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Asus ROG XG Mobile in review - Gaming convertible with AMD Ryzen 5980HS and GeForce RTX 3080

Full performance! We recently presented the Asus ROG Flow X13 in a detailed review. The external XG Mobile graphics card turns the compact convertible into a small gaming desktop PC. This review will reveal the performance that can actually be expected from the dedicated graphics card.
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The Asus ROG Flow X13 with the Asus ROG XG Mobile
The Asus ROG Flow X13 with the Asus ROG XG Mobile
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GPU-Z
GPU-Z

We recently reviewed the Asus ROG Flow X13 in detail. The device excelled with good connectivity and very good performance. The comprehensive review of the laptop can be found here.

In order to be able to use all the strengths of the Asus ROG Flow X13, the device can be expanded with the XG Mobile. This is an external graphics solution that turns the small convertible into a full-fledged gaming PC. The external graphics adapter is an Nvidia GeForce RTX 3080 laptop GPU with 16 GB of VRAM. It's connected to the device via the ROG XG Mobile Interface, and it also comes with a few other ports. As a result, there are four additional USB Type-A ports available to the user, and displays can also be directly connected via HDMI or DisplayPort. This already brings us to one conclusion, because Asus itself sees the intended use of the XG Mobile mostly in conjunction with an external display. At this point, we can also reveal that this combination is the better option in terms of performance.

The GeForce RTX 3080 laptop GPU is the mobile version of the RTX 3080, and with a maximum TGP of 150 watts, it hasn't been throttled as is often the case in laptops. We'll talk more about what this really means in terms of rates later on in the review. If you want to buy the Asus ROG Flow X13 with the XG Mobile, you'll have to dig deep into your pocket, because this combination is certainly no bargain at 3,500 Euros (~$4,230). Unfortunately, when it comes to availability, the situation still doesn't look much better than at the time of reviewing the Asus ROG Flow X13. From time to time, you can find devices listed at the mentioned price on various search engines.

Unfortunately, since Asus only allows the XG Mobile to be used in conjunction with the proprietary port, it can't be used with any other device. When we asked Asus whether other versions of the XG Mobile are planned, the answer was no. It surely isn't a problem for Asus to offer other GPUs in the form of an XG Mobile. However, costs and benefits probably have to be considered here.

The Asus ROG Flow X13 with the XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
ASUS ROG XG Mobile
The Asus ROG Flow X13 with the XG Mobile
ASUS ROG XG Mobile (GPU board)
ASUS ROG XG Mobile (GPU board)
ASUS ROG XG Mobile Mobile (PSU)

Synthetic benchmarks

The external graphics solution performs very well in the synthetic benchmarks. The ROG Flow X13 with the XG Mobile GPU wins the comparison against gaming laptops with an integrated GeForce RTX 3080 laptop GPU. Nevertheless, there are performance differences when using the XG Mobile with the Asus ROG Flow X13. If the convertible's display is used for image output, performance drops slightly. The performance loss is between 5 and 10%, which is due to the fact that the image signal has to be fed back to the device via the XG Mobile interface. This somewhat reduces the bandwidth. The same issue exists with the various eGPU docks that communicate via Thunderbolt. However, the bandwidth loss is even greater there. This is because the latter only use 4 PCIe lanes for data transfer. In contrast, the Asus ROG XG Mobile uses 8 PCIe lanes.

If we take another closer look at the synthetic tests, we can conclude that the combination of the Asus ROG Flow X13 and the Asus ROG XG Mobile is a serious candidate to take on even the fastest gaming laptops. If you use the device with an external display, you get a full-fledged desktop replacement with the compact convertible and the option to use the unit as a mobile work device as well. However, the Asus ROG XG Mobile can't reach the 3D performance of the Nvidia GeForce RTX 3080 for desktops. For comparison purposes, we have included the Asus GeForce RTX 3080 ROG Strix OC Gaming graphics card in order to better illustrate the performance difference in a visual way.

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3DMark
Fire Strike Extreme Graphics
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
20861 Points ∼100% +56%
Asus ROG Flow X13 with XG Mobile (external Display)
14480 Points ∼69% +8%
Average NVIDIA GeForce RTX 3080 Laptop GPU (12027 - 15128, n=4)
13758 Points ∼66% +3%
Asus ROG Flow X13 with XG Mobile (internal Display)
13397 Points ∼64%
3840x2160 Fire Strike Ultra Graphics
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
10793 Points ∼100% +45%
Asus ROG Flow X13 with XG Mobile (external Display)
7787 Points ∼72% +5%
Asus ROG Flow X13 with XG Mobile (internal Display)
7441 Points ∼69%
Asus ROG Zephyrus Duo 15 SE GX551QS
7435 Points ∼69% 0%
Average NVIDIA GeForce RTX 3080 Laptop GPU (5987 - 8293, n=14)
7403 Points ∼69% -1%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
6865 Points ∼64% -8%
2560x1440 Time Spy Graphics
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
17467 Points ∼100% +55%
Asus ROG Flow X13 with XG Mobile (external Display)
12394 Points ∼71% +10%
Asus ROG Zephyrus Duo 15 SE GX551QS
11407 Points ∼65% +1%
Asus ROG Flow X13 with XG Mobile (internal Display)
11276 Points ∼65%
Average NVIDIA GeForce RTX 3080 Laptop GPU (9023 - 13210, n=23)
11237 Points ∼64% 0%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
10898 Points ∼62% -3%
Gigabyte Aero 17 HDR YC
9646 Points ∼55% -14%
1280x720 Cloud Gate Standard Graphics
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
202725 Points ∼100% +422%
Asus ROG Flow X13 with XG Mobile (external Display)
166651 Points ∼82% +329%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
149262 Points ∼74% +285%
Average NVIDIA GeForce RTX 3080 Laptop GPU (38816 - 192950, n=18)
127675 Points ∼63% +229%
Asus ROG Zephyrus Duo 15 SE GX551QS
97176 Points ∼48% +150%
Gigabyte Aero 17 HDR YC
71670 Points ∼35% +85%
Asus ROG Flow X13 with XG Mobile (internal Display)
38816 Points ∼19%
1280x720 Sky Diver Graphics
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
123435 Points ∼100% +286%
Asus ROG Flow X13 with XG Mobile (external Display)
94199 Points ∼76% +195%
Average NVIDIA GeForce RTX 3080 Laptop GPU (31963 - 94199, n=2)
63081 Points ∼51% +97%
Asus ROG Flow X13 with XG Mobile (internal Display)
31963 Points ∼26%
3DMark 11
1280x720 Performance GPU
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
47287 Points ∼100% +17%
Asus ROG Flow X13 with XG Mobile (external Display)
42753 Points ∼90% +6%
Asus ROG Flow X13 with XG Mobile (internal Display)
40414 Points ∼85%
Average NVIDIA GeForce RTX 3080 Laptop GPU (32521 - 43744, n=19)
39586 Points ∼84% -2%
Asus ROG Zephyrus Duo 15 SE GX551QS
38532 Points ∼81% -5%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
37171 Points ∼79% -8%
1280x720 Performance
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
32211 Points ∼100% +12%
Asus ROG Flow X13 with XG Mobile (external Display)
30535 Points ∼95% +6%
Average NVIDIA GeForce RTX 3080 Laptop GPU (24180 - 32922, n=19)
29530 Points ∼92% +2%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
29409 Points ∼91% +2%
Asus ROG Zephyrus Duo 15 SE GX551QS
29192 Points ∼91% +1%
Asus ROG Flow X13 with XG Mobile (internal Display)
28853 Points ∼90%
Unigine Superposition
1920x1080 1080p Extreme
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
10572 Points ∼100% +36%
Asus ROG Flow X13 with XG Mobile (internal Display)
7752 Points ∼73%
Average NVIDIA GeForce RTX 3080 Laptop GPU (7622 - 7752, n=2)
7687 Points ∼73% -1%
Asus ROG Flow X13 with XG Mobile (external Display)
7622 Points ∼72% -2%
3840x2160 4k Optimized
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
13984 Points ∼100% +47%
Asus ROG Flow X13 with XG Mobile (external Display)
9929 Points ∼71% +5%
Average NVIDIA GeForce RTX 3080 Laptop GPU (9483 - 9929, n=2)
9706 Points ∼69% +2%
Asus ROG Flow X13 with XG Mobile (internal Display)
9483 Points ∼68%
7680x4320 8k Optimized
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
6243 Points ∼100% +44%
Asus ROG Flow X13 with XG Mobile (internal Display)
4335 Points ∼69%
Average NVIDIA GeForce RTX 3080 Laptop GPU (4280 - 4335, n=2)
4308 Points ∼69% -1%
Asus ROG Flow X13 with XG Mobile (external Display)
4280 Points ∼69% -1%
LuxMark v2.0 64Bit
Room GPUs-only
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
5112 Samples/s ∼100% +4%
Asus ROG Flow X13 with XG Mobile (internal Display)
4912 Samples/s ∼96%
Average NVIDIA GeForce RTX 3080 Laptop GPU (4895 - 4912, n=2)
4904 Samples/s ∼96% 0%
Asus ROG Flow X13 with XG Mobile (external Display)
4895 Samples/s ∼96% 0%
Sala GPUs-only
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
12797 Samples/s ∼100% +14%
Asus ROG Flow X13 with XG Mobile (internal Display)
11251 Samples/s ∼88%
Average NVIDIA GeForce RTX 3080 Laptop GPU (11220 - 11251, n=2)
11236 Samples/s ∼88% 0%
Asus ROG Flow X13 with XG Mobile (external Display)
11220 Samples/s ∼88% 0%
ComputeMark v2.1
1024x600 Normal, Score
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
39924 Points ∼100% +62%
Asus ROG Flow X13 with XG Mobile (external Display)
28376 Points ∼71% +15%
Average NVIDIA GeForce RTX 3080 Laptop GPU (24646 - 28376, n=2)
26511 Points ∼66% +8%
Asus ROG Flow X13 with XG Mobile (internal Display)
24646 Points ∼62%
1024x600 Normal, Fluid 3DTex
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
4417 Points ∼100% +62%
Asus ROG Flow X13 with XG Mobile (internal Display)
2725 Points ∼62%
Average NVIDIA GeForce RTX 3080 Laptop GPU (2709 - 2725, n=2)
2717 Points ∼62% 0%
Asus ROG Flow X13 with XG Mobile (external Display)
2709 Points ∼61% -1%
1024x600 Normal, Fluid 2DTexArr
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
4087 Points ∼100% +55%
Asus ROG Flow X13 with XG Mobile (internal Display)
2634 Points ∼64%
Average NVIDIA GeForce RTX 3080 Laptop GPU (2603 - 2634, n=2)
2619 Points ∼64% -1%
Asus ROG Flow X13 with XG Mobile (external Display)
2603 Points ∼64% -1%
1024x600 Normal, Mandel Vector
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
7148 Points ∼100% +62%
Asus ROG Flow X13 with XG Mobile (external Display)
5231 Points ∼73% +18%
Average NVIDIA GeForce RTX 3080 Laptop GPU (4416 - 5231, n=2)
4824 Points ∼67% +9%
Asus ROG Flow X13 with XG Mobile (internal Display)
4416 Points ∼62%
1024x600 Normal, Mandel Scalar
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
9554 Points ∼100% +70%
Asus ROG Flow X13 with XG Mobile (external Display)
6769 Points ∼71% +21%
Average NVIDIA GeForce RTX 3080 Laptop GPU (5610 - 6769, n=2)
6190 Points ∼65% +10%
Asus ROG Flow X13 with XG Mobile (internal Display)
5610 Points ∼59%
1024x600 Normal, QJuliaRayTrace
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
14718 Points ∼100% +59%
Asus ROG Flow X13 with XG Mobile (external Display)
11065 Points ∼75% +19%
Average NVIDIA GeForce RTX 3080 Laptop GPU (9260 - 11065, n=2)
10163 Points ∼69% +10%
Asus ROG Flow X13 with XG Mobile (internal Display)
9260 Points ∼63%

Gaming benchmarks

A similar picture is seen in the gaming tests as previously in the synthetic benchmarks. Nonetheless, the performance difference is sometimes significantly bigger when using an external display. If you want to use the Asus ROG Flow X13 together with the Asus ROG XG Mobile without sacrificing performance, you should avoid using the internal display. However, we didn't experience unplayable frame rates in the native Full HD resolution with the 13-inch device.

The gap to the desktop counterpart of the GeForce RTX 3080 is similarly wide as in the test before. However, the mobile version scores points with 6 GB more of VRAM. Consequently, VRAM critics can sit back and relax, because the Asus ROG XG Mobile is more than adequately equipped with 16 GB.

We logged the frame times and the frame progression with the game The Witcher 3 (Ultra preset, 1080p). We used the Asus ROG Flow X13's display once and an external 4K monitor once. When using the internal display of the convertible, the frame times showed slightly higher latencies after a while, which were accompanied by a slight drop in FPS. The frame times stabilized after about two minutes. However, we can't speak of a noticeable performance loss here. When using the external monitor, the CapFrameX log shows a more stable result without performance loss.

The Witcher 3 frame times (Ultra preset) - Internal display
The Witcher 3 frame times (Ultra preset) - Internal display
The Witcher 3 frame progression (Ultra preset) - Internal display
The Witcher 3 frame progression (Ultra preset) - Internal display
The Witcher 3 frame times (Ultra preset) - External display
The Witcher 3 frame times (Ultra preset) - External display
The Witcher 3 frame progression (Ultra preset) - External display
The Witcher 3 frame progression (Ultra preset) - External display
The Witcher 3
1920x1080 Ultra Graphics & Postprocessing (HBAO+)
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
152 (138min - 171max) fps ∼100% +37%
Asus ROG Flow X13 with XG Mobile (external Display)
116 (104min - 132max) fps ∼76% +5%
Asus ROG Flow X13 with XG Mobile (internal Display)
111 (102min - 125max) fps ∼73%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
108.3 (98min - 117max) fps ∼71% -2%
Asus ROG Zephyrus Duo 15 SE GX551QS
104.6 (97min - 110max) fps ∼69% -6%
Gigabyte Aero 17 HDR YC
96.1 (74min) fps ∼63% -13%
3840x2160 High Graphics & Postprocessing (Nvidia HairWorks Off)
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
115 (107min - 124max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
82.2 (76min - 90max) fps ∼71%
Asus ROG Zephyrus Duo 15 SE GX551QS
80.4 (74min - 87max) fps ∼70%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
80 (74min - 88max) fps ∼70%
Gigabyte Aero 17 HDR YC
67.5 (55min) fps ∼59%
Far Cry 5
1920x1080 Ultra Preset AA:T
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
145 (112min - 200max) fps ∼100% +93%
Asus ROG Zephyrus Duo 15 SE GX551QS
107 (85min - 140max) fps ∼74% +43%
Asus ROG Flow X13 with XG Mobile (external Display)
100 (77min - 134max) fps ∼69% +33%
Asus ROG Flow X13 with XG Mobile (internal Display)
75 (56min - 96max) fps ∼52%
3840x2160 Ultra Preset AA:T
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
95 (85min - 107max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
62 (52min - 76max) fps ∼65%
Asus ROG Zephyrus Duo 15 SE GX551QS
59 (50min - 71max) fps ∼62%
Far Cry New Dawn
1920x1080 Ultra Preset
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
115 (77min - 195max) fps ∼100% +85%
Gigabyte Aero 17 HDR YC
100 (72min) fps ∼87% +61%
Asus ROG Flow X13 with XG Mobile (external Display)
81 (55min - 131max) fps ∼70% +31%
Asus ROG Flow X13 with XG Mobile (internal Display)
62 (44min - 94max) fps ∼54%
3840x2160 Ultra Preset
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
89 (72min - 108max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
65 (54min - 80max) fps ∼73%
Gigabyte Aero 17 HDR YC
58 (49min) fps ∼65%
F1 2020
1920x1080 Ultra High Preset AA:T AF:16x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
185 (158min - 218max) fps ∼100% +25%
Asus ROG Flow X13 with XG Mobile (external Display)
180 (150min - 209max) fps ∼97% +22%
Asus ROG Zephyrus Duo 15 SE GX551QS
150 (129min - 174max) fps ∼81% +1%
Asus ROG Flow X13 with XG Mobile (internal Display)
148 (128min - 168max) fps ∼80%
3840x2160 Ultra High Preset AA:T AF:16x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
118 (102min - 137max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
83.5 (71min - 97max) fps ∼71%
Asus ROG Zephyrus Duo 15 SE GX551QS
73 (64min - 81max) fps ∼62%
Shadow of the Tomb Raider
1920x1080 Highest Preset AA:T
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
185 fps ∼100% +142%
Asus ROG Flow X13 with XG Mobile (external Display)
119 fps ∼64% +55%
Asus ROG Zephyrus Duo 15 SE GX551QS
116 fps ∼63% +51%
Asus ROG Flow X13 with XG Mobile (internal Display)
76.6 fps ∼41%
3840x2160 Highest Preset AA:T
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
83.9 fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
56.3 fps ∼67%
Asus ROG Zephyrus Duo 15 SE GX551QS
55 (45min - 78max) fps ∼66%
GTA V
3840x2160 High/On (Advanced Graphics Off) AA:FX AF:8x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
136 (2.5min, 111P1 - 361max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
112 (9.66min, 83.3P1 - 193max) fps ∼82%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
106 (9.14min, 76.9P1 - 197max) fps ∼78%
Gigabyte Aero 17 HDR YC
88 (24.7min, 62.5P1 - 169max) fps ∼65%
1920x1080 Highest Settings possible AA:4xMSAA + FX AF:16x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
130 (5.89min, 76.9P1 - 233max) fps ∼100% +55%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
99.5 (5.74min, 71.4P1 - 185max) fps ∼77% +18%
Gigabyte Aero 17 HDR YC
90.7 (10.4min, 62.5P1 - 166max) fps ∼70% +8%
Asus ROG Flow X13 with XG Mobile (external Display)
87.2 (6.63min, 62.5P1 - 160max) fps ∼67% +4%
Asus ROG Flow X13 with XG Mobile (internal Display)
84 (27.2min, 58.8P1 - 156max) fps ∼65%
Dota 2 Reborn
3840x2160 ultra (3/3) best looking
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
159.1 (125.2min) fps ∼100%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
128 (107.9min) fps ∼80%
Asus ROG Flow X13 with XG Mobile (external Display)
111 (97.3min) fps ∼70%
Gigabyte Aero 17 HDR YC
101 (85.4min) fps ∼63%
Asus ROG Zephyrus Duo 15 SE GX551QS
99.9 (89.6min) fps ∼63%
1920x1080 ultra (3/3) best looking
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
168.7 (132.8min) fps ∼100% +55%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
134 (115.1min) fps ∼79% +23%
Gigabyte Aero 17 HDR YC
122 (105.3min) fps ∼72% +12%
Asus ROG Zephyrus Duo 15 SE GX551QS
119 (105.6min) fps ∼71% +9%
Asus ROG Flow X13 with XG Mobile (external Display)
110.7 (97.8min) fps ∼66% +2%
Asus ROG Flow X13 with XG Mobile (internal Display)
108.9 (96.5min) fps ∼65%
Final Fantasy XV Benchmark
1920x1080 High Quality
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
156 fps ∼100% +49%
Asus ROG Flow X13 with XG Mobile (external Display)
111 fps ∼71% +6%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
109 fps ∼70% +4%
Asus ROG Zephyrus Duo 15 SE GX551QS
105 fps ∼67% 0%
Asus ROG Flow X13 with XG Mobile (internal Display)
105 fps ∼67%
3840x2160 High Quality
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
76.1 fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
53.2 fps ∼70%
Asus ROG Zephyrus Duo 15 SE GX551QS
49.5 fps ∼65%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
49.3 fps ∼65%
X-Plane 11.11
1920x1080 high (fps_test=3)
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
123 fps ∼100% +88%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
92.3 fps ∼75% +41%
Gigabyte Aero 17 HDR YC
83.8 fps ∼68% +28%
Asus ROG Zephyrus Duo 15 SE GX551QS
77 fps ∼63% +17%
Asus ROG Flow X13 with XG Mobile (external Display)
69 fps ∼56% +5%
Asus ROG Flow X13 with XG Mobile (internal Display)
65.6 fps ∼53%
3840x2160 high (fps_test=3)
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
105 fps ∼100%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
79 fps ∼75%
Gigabyte Aero 17 HDR YC
63.5 fps ∼60%
Asus ROG Flow X13 with XG Mobile (external Display)
61.3 fps ∼58%
Asus ROG Zephyrus Duo 15 SE GX551QS
60.9 fps ∼58%
Strange Brigade
1920x1080 ultra AA:ultra AF:16
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
289 (116min, 212P1 - 510max) fps ∼100% +71%
Asus ROG Flow X13 with XG Mobile (external Display)
209 (69.5min, 158P1 - 322max) fps ∼72% +24%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
197 (81.6min, 149P1 - 298max) fps ∼68% +17%
Asus ROG Zephyrus Duo 15 SE GX551QS
174 (106min, 124P1 - 346max) fps ∼60% +3%
Asus ROG Flow X13 with XG Mobile (internal Display)
169 (64.2min, 119P1 - 319max) fps ∼58%
3840x2160 ultra AA:ultra AF:16
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
135 (96.6min, 111P1 - 312max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
91.7 (71.6min, 78.9P1 - 119max) fps ∼68%
Asus ROG Zephyrus Duo 15 SE GX551QS
84.2 (56.4min, 70P1 - 126max) fps ∼62%
Razer Blade Pro 17 2021 Touch 4K, i7-10875H RTX 3080
84.1 (69.5min, 72.1P1 - 112max) fps ∼62%
Metro Exodus
3840x2160 Ultra Quality AF:16x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
64.1 (36.54min - 108.57max) fps ∼100%
Asus ROG Flow X13 with XG Mobile (external Display)
45.1 (28.36min - 78.45max) fps ∼70%
Gigabyte Aero 17 HDR YC
38.2 (24min) fps ∼60%
1920x1080 Ultra Quality AF:16x
ASUS GeForce RTX 3080 ROG STRIX OC GAMING
111 (57.16min - 183.25max) fps ∼100% +29%
Asus ROG Flow X13 with XG Mobile (external Display)
87.9 (45.07min - 140.25max) fps ∼79% +2%
Asus ROG Flow X13 with XG Mobile (internal Display)
85.9 (41.99min - 132.61max) fps ∼77%
Gigabyte Aero 17 HDR YC
74.2 (39min) fps ∼67% -14%

Gaming benchmarks (internal display)

low med. high ultra
GTA V (2015) 164 137 84 fps
The Witcher 3 (2015) 309 190 111 fps
Dota 2 Reborn (2015) 133.3 129 113.2 108.9 fps
Final Fantasy XV Benchmark (2018) 158 134 105 fps
X-Plane 11.11 (2018) 93.7 81.1 65.6 fps
Far Cry 5 (2018) 94 84 79 75 fps
Strange Brigade (2018) 318 196 181 169 fps
Shadow of the Tomb Raider (2018) 89.3 81.6 79.4 76.6 fps
Far Cry New Dawn (2019) 80 70 68 62 fps
Metro Exodus (2019) 147 125 104 85.9 fps
F1 2020 (2020) 235 182 178 148 fps

Gaming benchmarks (external display)

low med. high ultraQHD4K
GTA V (2015) 173 167 150 87.2 82.2 112 fps
The Witcher 3 (2015) 346 295 212 116 82.2 fps
Dota 2 Reborn (2015) 132.7 122.2 116.9 110.7 111 fps
Final Fantasy XV Benchmark (2018) 165 140 111 87.4 53.2 fps
X-Plane 11.11 (2018) 98.4 85.4 69 61.3 fps
Far Cry 5 (2018) 129 115 109 100 98 62 fps
Strange Brigade (2018) 388 292 240 209 156 91.7 fps
Shadow of the Tomb Raider (2018) 131 125 122 119 102 56.3 fps
Far Cry New Dawn (2019) 106 92 90 81 80 65 fps
Metro Exodus (2019) 162 132 109 87.9 45.1 45.1 fps
F1 2020 (2020) 268 220 215 180 140 83.5 fps

Emissions of the Asus ROG XG Mobile

The Asus ROG Flow X13 with the XG Mobile in the stress test
The Asus ROG XG Mobile in the stress test
The Asus ROG XG Mobile in the stress test
The Asus ROG XG Mobile in the stress test

Asus's external graphics solution for the ROG Flow X13 is equipped with a 280-watt power supply. Fortunately, it's located in the case so that a separate power adapter doesn't have to be lugged around. The GPU itself consumes 150 watts in Turbo mode. At the same time, the Asus ROG Flow X13 is also supplied with power. The eGPU dock can supply up to 100 watts.

You can see in the pictures above in the review that one fan extracts the waste heat from the case. It works hard under load, something that can't be ignored. We measured 53.8 dB(A) at a short measuring distance. Nonetheless, the noise of 48 dB(A) at a distance of one meter is much lower. This is also the more realistic scenario when using an external display or even the TV in the living room. Due to the relatively high-frequency fan noise, the measured noise levels still seem a bit louder from a subjective standpoint. However, the mobile comparison devices weren't able to score much better in terms of volume in our tests. In 2D mode, the Asus ROG XG Mobile is even silent thanks to its fan-stop mode.

As mentioned before, the small fan has quite a bit of work to do under load, which is also evident in the stress test. We registered a maximum of 86 °C (~187 °F) for the GeForce RTX 3080 laptop GPU in the FurMark test. However, the prolonged load didn't have a lasting impact on performance.

Compared to the review of the Asus ROG Flow X13, the system with the ROG XG Mobile consumes almost 150 watts more. This is exactly the power that is available to the mobile GPU in Turbo mode. To be more precise, 220 watts (FurMark) and 223 watts (gaming), respectively, are shown on our measuring device. This is roughly on par with the gaming laptops from Asus and Gigabyte used in this comparison.

The Asus ROG Flow X13 with the XG Mobile (FurMark)
The Asus ROG Flow X13 with the XG Mobile (FurMark)
The Asus ROG Flow X13 with the XG Mobile (while gaming - The Witcher 3 Ultra preset)
The Asus ROG Flow X13 with the XG Mobile (while gaming - The Witcher 3 Ultra preset)
FurMark stress test (PT 100%)
FurMark stress test (PT 100%)
Noise level when gaming (The Witcher 3 Ultra preset) - Distance of 20 centimeters
Noise level when gaming (The Witcher 3 Ultra preset) - Distance of 20 centimeters
Noise level when gaming (The Witcher 3 Ultra preset) - Distance of 1 meter
Noise level when gaming (The Witcher 3 Ultra preset) - Distance of 1 meter
 

Pros

+ very good gaming performance
+ modern architecture (8 nm)
+ DLSS plus ray tracing
+ zero-fan mode
+ plenty of ports (USB, HDMI, DisplayPort, Ethernet, SD card reader)

Cons

- high heat development
- loud under load
- very expensive

Verdict - Reasonable expansion for the ROG Flow X13

In review: Asus ROG FXG Mobile, provided by Asus Germany.
In review: Asus ROG FXG Mobile, provided by Asus Germany.
In review: Asus ROG FXG Mobile, provided by Asus Germany.

Those who are already proud owners of the Asus ROG Flow X13 can turn it into a gaming powerhouse in a flash with the Asus ROG XG Mobile. The dedicated GeForce GTX 1650 Mobile GPU is deactivated when using the ROG XG Mobile, and the full power of the GeForce RTX 3080 laptop GPU becomes available. There's no restriction to 80 or 100 watts as with some compact gaming laptops. Conversely, this means a maximum of 150 watts for the mobile GeForce RTX 3080. Compared to the desktop variant, the mobile RTX 3080 differs significantly. Fewer shader units limit performance a bit. In return, the RTX 3080 laptop version scores points with more VRAM. The graphics adapter offers a full 16 GB, which should please many users.

However, the Asus ROG XG Mobile offers even more advantages for the Flow X13. Additional USB ports as well as two more ports to connect external monitors are included in the expansion. We also have to take the addition of the Ethernet port and the SD card reader into account. The latter was a point of criticism in the review of the Asus ROG Flow X13, but this becomes somewhat relative with the use of the ROG XG Mobile. The slightly below-average Wi-Fi performance of the convertible can also be compensated for with the Ethernet connection.

The Asus ROG XG Mobile kills two birds with one stone. The GeForce RTX 3080 laptop GPU transforms the Asus ROG Flow X13 from a work device into a full-fledged gaming laptop without having to make any sacrifices.

It's important to know that the XG Mobile's 3D performance is slightly lower when using the internal display in conjunction with the Asus ROG Flow X13. The eGPU can only deliver its full performance when an external display is used. This is due to technical reasons and can't be avoided. Other eGPU solutions that communicate via Thunderbolt have similar difficulties here. Compared to the ROG XG Mobile Interface, which has 8 PCIe lanes, Thunderbolt only communicates with 4 lanes. Performance drops by 5 to 10%, but this is bearable. None of the tested games suffered to the point of resulting in unplayable frame rates.

The high performance also takes its toll in the form of heat. Asus integrated a small fan to dissipate this heat from the case. It's clearly audible and high-frequency under load, which makes the subjective perception of the noise level even higher. Furthermore, many buyers will probably be deterred by the very high price. The complete set will set you back 3,500 Euros (~$4,230). Comparable gaming laptops are similarly expensive, though. However, the Asus ROG Flow X13 can stand out with the plus point of its convertible characteristics. This expands the use cases of the compact companion enormously.

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Sebastian Bade
Editor of the original article: Sebastian Bade - Senior Tech Writer - 262 articles published on Notebookcheck since 2012
I was already interested in technology from an early age, and I was able to study for my dream job as an IT Systems Electronics Engineer. Subsequently, I started 12 years of military service, during which I learned a lot about technology and constantly kept my knowledge up to date with the latest developments. As I like to share my knowledge, I found Notebookcheck was a very good opportunity for this. In addition, I also work a lot with water cooling and network security.
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Stephanie Chamberlain
Translator: Stephanie Chamberlain - Translator - 337 articles published on Notebookcheck since 2020
I've been fascinated with technology ever since I got my very first Android smartphone, which was quite a while ago. The power packed into such a small footprint still amazes me. Learning to program made my understanding of technology deeper, and at the same time, it expanded my interest to the area of desktop computers and laptops. All this led me to enjoy reading and watching reviews of new devices, and that's how I stumbled upon Notebookcheck. I immediately found their reviews to be very comprehensive, and luckily, I've even had the chance of translating them since 2019. When it comes to the huge field of technology, I'm currently also interested in specializing in Java programming.
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> Notebook / Laptop Reviews and News > Reviews > Asus ROG XG Mobile in review - Gaming convertible with AMD Ryzen 5980HS and GeForce RTX 3080
Sebastian Bade, 2021-03- 3 (Update: 2021-04-17)