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AMD Ryzen 9 7940HS vs AMD Ryzen 7 7840U

AMD Ryzen 9 7940HS

► remove from comparison AMD R9 7940HS

The Ryzen 9 7940HS is a powerful Phoenix family APU that saw the light of day in H1 2023. Its 8 cores are powered by the Zen 4 architecture and are SMT-enabled for a total of 16 processing threads. 4.0 GHz is the base clock speed and the highest Boost clock speed achievable is 5.2 GHz.

The 7940HS introduces Ryzen AI which is AMD's answer to Intel's DL Boost and GNA technologies. The Radeon 780M serves as the integrated graphics adapter.

Architecture & Features

Phoenix family chips are powered by the Zen 4 architecture, much like Dragon Range family chips are. The latter however lacks hardware AI workload acceleration capabilities that Phoenix has. Ryzen AI is set to give applications such as DaVinci Resolve and Photoshop quite a bit of generative AI magic.

More importantly, Zen 4 introduces AVX512 support (which Zen 3 chips did not have) and, thanks to a plethora of other improvements including larger caches/registers/buffers across the board, is slated to bring a double-digit IPC improvement.

The 7940HS has 16 MB of L3 cache and support for super-fast RAM (up to LPDDR5x-7500 or DDR5-5600, including ECC-enabled memory). The processor is compatible with USB 4 and thus with Thunderbolt; PCIe support is limited to the 4.0 spec for a throughput of 1.97 GB/s per lane.

OS support is limited to 64-bit editions of Windows 11 and Windows 10 and of course to Linux. Note that the chip isn't overclockable and neither is it user-replaceable as it gets soldered down for good (FP7, FP7r2, FP8 socket interfaces).

Performance

The average 7940HS in our database is in the same league as the Core i9-12900HK and also, somewhat disappointingly, the Ryzen 7 7840HS, as far as multi-thread benchmark scores are concerned.

Thanks to its decent cooling solution and a long-term CPU power limit of 80 W, the ROG Zephyrus G14 GA402XY is among the fastest laptops built around the 7940HS that we know of. It can be about 15% faster in CPU-bound workloads than the slowest system featuring the same chip in our database, as of August 2023.

Graphics

The Radeon 780M has 12 CUs (768 shaders) running at up to 2,800 MHz. This is a very fast iGPU, as of late 2023. It will let you use up to 4 monitors with resolutions as high as SUHD 4320p, and it is also capable of HW-encoding and HW-decoding most video codecs including AVC, HEVC and AV1, but more importantly it is fast enough for proper 1080p gaming as long as one is fine with low to medium detail settings.

Your mileage may vary depending on how high the CPU power limits are, how competent the cooling solution of the system is, how fast the RAM of the system is (there is no dedicated VRAM).

Power consumption

This Ryzen 9 series chip has a long-term power limit (default TDP) of 35 W to 54 W, giving laptop makers a choice between longer battery life and higher performance. Either way, an active cooling solution is a must for a system powered by this chip.

The 7940HS is built with TSMC's 4 nm process for high, as of late 2023, energy efficiency.

AMD Ryzen 7 7840U

► remove from comparison AMD R7 7840U

The Ryzen 7 7840U is a powerful laptop processor (APU) of the Phoenix product family. Its eight Zen 4 cores run at 3.3 GHz to 5.1 GHz and are SMT-enabled for a total of 16 processing threads. The great Radeon 780M is responsible for 3D processing and similar duties; the 7840U also features Ryzen AI which is AMD's answer to Intel's GNA and DL Boost.

Architecture & Features

Phoenix family chips are powered by the Zen 4 architecture, much like Dragon Range family chips are. The latter however lacks hardware AI workload acceleration capabilities that Phoenix has.

More importantly, Zen 4 introduces some rather solid AVX512 support (which Zen 3 chips did not have) and, thanks to a plethora of other improvements including larger caches/registers/buffers across the board, is set to bring a double-digit IPC improvement.

Elsewhere, the 7840U has 16 MB of L3 cache and support for super-fast DDR5-5600 and LPDDR5x-7500 RAM. The chip is compatible with USB 4 and thus with Thunderbolt. It comes with 20 PCIe 4 lanes for NVMe SSD speeds of up to 7.8 GB/s.

Systems built around the 7840U are designed to run 64-bit Windows 11, 64-bit Windows 10, or Linux. Please note that this processor is not overclockable and neither is it user-replaceable. It gets soldered down for good instead (FP7, FP7r2, FP8 socket interfaces).

Performance

The average 7840U in our extensive database is about as fast as the Core i7-12650H, as far as multi-thread benchmark scores are concerned. This means the Ryzen 7 APU packs quite a wallop, as of mid 2023.

Thanks to its decent cooling solution and a long-term CPU power limit of 35 W, the Framework Laptop 13.5 is among the fastest systems powered by the 7840U that we know of. It can be about 30% faster than the slowest system featuring the same chip in our database, as of December 2023.

Graphics

The Radeon 780M has 12 CUs (768 shaders) purring away at up to 2,700 MHz. This is exactly the right iGPU for people looking for a bit more horsepower than what Intel's aging Xe options can provide. The Radeon will let you use up to 4 monitors with resolutions as high as SUHD 4320p and it will also HW-decode and HW-encode the most widely used video codecs (including AV1, HEVC and AVC) without breaking a sweat. In terms of gaming, the thing is good enough for 1080p and medium-to-low settings, as of late 2023.

Your mileage may vary depending on how high the CPU power limits are, how competent the cooling solution of your system is, how fast the RAM of your system is (there is no dedicated VRAM here).

Power consumption

This Ryzen 7 series chip has a long-term power limit (default TDP) of 28 W. Laptop makers are free to change that value significantly, with values as low as 15 W and as high as 30 W greenlighted by AMD. Either way, an active cooling solution is a must for any system powered by this chip.

The 7840U is built with TSMC's 4 nm process for high, as of late 2023, energy efficiency.

ModelAMD Ryzen 9 7940HSAMD Ryzen 7 7840U
SeriesAMD Phoenix (Zen 4, Ryzen 7040)AMD Phoenix (Zen 4, Ryzen 7040)
CodenamePhoenix-HS (Zen 4)Phoenix-U (Zen 4)
Series: Phoenix (Zen 4, Ryzen 7040) Phoenix-U (Zen 4)
AMD Ryzen 9 7940HS « 4 - 5.2 GHz8 / 16 cores16 MB L3
AMD Ryzen 9 PRO 7940HS compare4 - 5.2 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 7840HS compare3.8 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 7840S compare3.8 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 PRO 7840HS compare3.8 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 5 7640HS compare4.3 - 5 GHz6 / 12 cores16 MB L3
AMD Ryzen 7 7840U « 3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 5 7640U compare3.5 - 4.9 GHz6 / 12 cores16 MB L3
Clock4000 - 5200 MHz3300 - 5100 MHz
L1 Cache512 KB512 KB
L2 Cache8 MB8 MB
L3 Cache16 MB16 MB
Cores / Threads8 / 168 / 16
TDP35 Watt28 Watt
Technology4 nm4 nm
Die Size178 mm2178 mm2
max. Temp.100 °C100 °C
SocketFP7/FP7r2/FP8FP7/FP7r2/FP8
FeaturesDDR5-5600/LPDDR5x-7500 RAM (incl. ECC), PCIe 4, Ryzen AI, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SMEDDR5-5600/LPDDR5x-7500 RAM, PCIe 4, Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
iGPUAMD Radeon 780M ( - 2800 MHz)AMD Radeon 780M ( - 2700 MHz)
Architecturex86x86
Announced
Manufacturerwww.amd.comwww.amd.com

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - R9 7940HS
46.2 pt (64%)
Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - R7 7840U
41.9 pt (58%)
Cinebench 2024 - CB24 CPU Single Core
min: 104     avg: 106     median: 106 (74%)     max: 108 Points
min: 81     avg: 89     median: 89 (62%)     max: 97 Points
Cinebench 2024 - CB24 CPU Multi Core
min: 824     avg: 912     median: 937.5 (17%)     max: 972 Points
min: 609     avg: 670     median: 669.5 (12%)     max: 730 Points
Cinebench R23 - Cinebench R23 Multi Core
min: 15556     avg: 16952     median: 16985 (16%)     max: 18131 Points
min: 11739     avg: 12865     median: 12385 (12%)     max: 15074 Points
Cinebench R23 - Cinebench R23 Single Core
min: 1733     avg: 1787     median: 1791 (76%)     max: 1832 Points
min: 1581     avg: 1673     median: 1683 (72%)     max: 1742 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 680     avg: 701     median: 702 (78%)     max: 714 Points
min: 533     avg: 640     median: 655 (73%)     max: 677 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 6277     avg: 6635     median: 6640 (16%)     max: 7111 Points
min: 4469     avg: 5034     median: 4853 (12%)     max: 5917 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 2470     avg: 2687     median: 2663 (17%)     max: 2848 Points
min: 1024.7     avg: 1930     median: 1986 (13%)     max: 2439 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 277     avg: 283.7     median: 284 (86%)     max: 288 Points
min: 217     avg: 255.1     median: 264 (80%)     max: 272 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 29.8     avg: 30.3     median: 30.3 (39%)     max: 30.88 Points
min: 20.46     avg: 22.6     median: 22.6 (29%)     max: 24.8 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 3.34     avg: 3.4     median: 3.4 (85%)     max: 3.46 Points
min: 2.6     avg: 2.8     median: 2.8 (69%)     max: 2.97 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 7798     avg: 7881     median: 7880.5 (48%)     max: 7963 Points
min: 5996     avg: 6669     median: 6669 (40%)     max: 7342 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 47982     avg: 48914     median: 48913.5 (35%)     max: 49845 Points
min: 36812     avg: 38490     median: 38489.5 (28%)     max: 40167 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 84721     avg: 86625     median: 86625 (60%)     max: 88529 Points
min: 59874     avg: 63534     median: 63533.5 (44%)     max: 67193 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 14300     avg: 14516     median: 14515.5 (18%)     max: 14731 Points
min: 11172     avg: 12089     median: 12089 (15%)     max: 13006 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 66.801     avg: 82.5     median: 82.5 (1%)     max: 98.222 s
87.1 s (1%)
wPrime 2.10 - wPrime 2.0 32m *
min: 2.648     avg: 2.7     median: 2.7 (1%)     max: 2.698 s
3.5 s (1%)
wPrime 1.55 - wPrime 1.55 1024m *
565 s (2%)
wPrime 1.55 - wPrime 1.55 32m *
17.8 s (9%)
WinRAR - WinRAR 4.0
min: 7439     avg: 7465     median: 7464.5 (12%)     max: 7490 Points
min: 5629     avg: 5723     median: 5723 (9%)     max: 5817 Points
7-Zip 18.03 - 7-Zip 18.03 Multli Thread 4 runs
min: 66408     avg: 70832     median: 70707 (41%)     max: 73434 MIPS
min: 50087     avg: 55578     median: 54022 (31%)     max: 62156 MIPS
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 6417     avg: 6643     median: 6642 (79%)     max: 6776 MIPS
min: 4657     avg: 5802     median: 5964 (71%)     max: 6408 MIPS
X264 HD Benchmark 4.0 - x264 Pass 2
min: 140.8     avg: 145.8     median: 145.8 (51%)     max: 150.8 fps
min: 105.52     avg: 108.8     median: 108.8 (38%)     max: 112.1 fps
X264 HD Benchmark 4.0 - x264 Pass 1
min: 292.5     avg: 298.5     median: 298.5 (69%)     max: 304.5 fps
min: 232     avg: 237.3     median: 237.3 (55%)     max: 242.64 fps
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 20.1     avg: 21.1     median: 20.9 (37%)     max: 22.6 fps
min: 14.4     avg: 15.6     median: 15 (26%)     max: 18.6 fps
TrueCrypt - TrueCrypt Serpent
min: 1.3     avg: 1.4     median: 1.4 (0%)     max: 1.4 GB/s
min: 0.953     avg: 1     median: 1 (0%)     max: 1 GB/s
TrueCrypt - TrueCrypt Twofish
2.1 GB/s (36%)
min: 1.5     avg: 1.6     median: 1.6 (27%)     max: 1.6 GB/s
TrueCrypt - TrueCrypt AES
min: 14.8     avg: 15     median: 15 (39%)     max: 15.1 GB/s
min: 6.1     avg: 8.5     median: 8.5 (22%)     max: 10.8 GB/s
Blender - Blender 3.3 Classroom CPU *
min: 287     avg: 306.9     median: 305 (4%)     max: 331 Seconds
min: 332     avg: 419.7     median: 423.5 (5%)     max: 503 Seconds
Blender - Blender 2.79 BMW27 CPU *
min: 182     avg: 190.4     median: 188.5 (1%)     max: 202 Seconds
min: 208     avg: 251.3     median: 262 (2%)     max: 270 Seconds
R Benchmark 2.5 - R Benchmark 2.5 *
min: 0.4159     avg: 0.4     median: 0.4 (9%)     max: 0.4467 sec
min: 0.4559     avg: 0.5     median: 0.5 (10%)     max: 0.581 sec
3DMark 06 - CPU - 3DMark 06 - CPU
min: 14891     avg: 15553     median: 15689 (33%)     max: 15851 Points
min: 12402     avg: 12635     median: 12482 (27%)     max: 13021 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 7.058     avg: 7.3     median: 7.3 (2%)     max: 7.442 s
min: 7.238     avg: 8.3     median: 8.3 (2%)     max: 9.397 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 17.513     avg: 18     median: 18 (1%)     max: 18.402 s
min: 18.168     avg: 20.9     median: 20.9 (1%)     max: 23.633 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 529.929     avg: 531     median: 531.4 (2%)     max: 532.8 s
min: 626.26     avg: 706     median: 705.7 (3%)     max: 785.226 s
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 74246     avg: 80834     median: 80476.5 (70%)     max: 86583 Points
min: 60726     avg: 63048     median: 63563 (56%)     max: 64340 Points
3DMark 11 - 3DM11 Performance Physics
min: 16799     avg: 22601     median: 22587.5 (61%)     max: 25006 Points
min: 12375     avg: 16687     median: 16426 (44%)     max: 19923 Points
3DMark - 3DMark Ice Storm Physics
min: 79935     avg: 88670     median: 89772 (73%)     max: 96559 Points
min: 64410     avg: 71391     median: 72497 (59%)     max: 76886 Points
3DMark - 3DMark Ice Storm Extreme Physics
min: 79450     avg: 88483     median: 89602 (73%)     max: 96418 Points
min: 64515     avg: 70689     median: 72428 (59%)     max: 75123 Points
3DMark - 3DMark Ice Storm Unlimited Physics
min: 85305     avg: 91108     median: 92030 (78%)     max: 96047 Points
min: 65423     avg: 72363     median: 74802 (63%)     max: 76863 Points
3DMark - 3DMark Cloud Gate Physics
min: 13400     avg: 19703     median: 21112 (53%)     max: 21353 Points
min: 9655     avg: 15027     median: 15932.5 (40%)     max: 17714 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 24034     avg: 28329     median: 28504 (51%)     max: 30876 Points
min: 17823     avg: 21701     median: 21733 (39%)     max: 25050 Points
3DMark - 3DMark Time Spy CPU
min: 10388     avg: 11211     median: 11210 (47%)     max: 12212 Points
min: 6548     avg: 8147     median: 8030 (34%)     max: 9501 Points
Geekbench 6.2 - Geekbench 6.2 Single-Core
min: 2426     avg: 2618     median: 2630 (80%)     max: 2746 Points
min: 1982     avg: 2350     median: 2389 (73%)     max: 2562 Points
Geekbench 6.2 - Geekbench 6.2 Multi-Core
min: 9899     avg: 12185     median: 12249 (48%)     max: 13470 Points
min: 7310     avg: 9616     median: 10405 (41%)     max: 11489 Points
Geekbench 5.5 - Geekbench 5.1 - 5.4 64 Bit Single-Core
min: 1823     avg: 1982     median: 1994.5 (84%)     max: 2032 Points
min: 1355     avg: 1700     median: 1723 (73%)     max: 1933 Points
Geekbench 5.5 - Geekbench 5.1 - 5.4 64 Bit Multi-Core
min: 11207     avg: 11870     median: 11837.5 (21%)     max: 12500 Points
min: 7399     avg: 9014     median: 9248 (17%)     max: 10558 Points
Geekbench 5.0 - Geekbench 5.0 64 Bit Single-Core
min: 1764     avg: 1874     median: 1906 (8%)     max: 1918 Points
min: 1411     avg: 1488     median: 1487.5 (6%)     max: 1564 Points
Geekbench 5.0 - Geekbench 5.0 64 Bit Multi-Core
min: 11232     avg: 11567     median: 11454 (36%)     max: 12127 Points
min: 8055     avg: 8417     median: 8417 (27%)     max: 8779 Points
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Single-Core
min: 7410     avg: 7856     median: 7904 (79%)     max: 8253 Points
6140 Points (61%)
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Multi-Core
min: 45905     avg: 46966     median: 46270 (52%)     max: 48723 Points
min: 30359     avg: 32401     median: 32400.5 (36%)     max: 34442 Points
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 481     avg: 497.2     median: 499 (1%)     max: 515 ms
min: 509     avg: 566     median: 543 (1%)     max: 746 ms
Octane V2 - Octane V2 Total Score
89067 Points (80%)
min: 81820     avg: 82676     median: 82676 (74%)     max: 83532 Points
WebXPRT 4 - WebXPRT 4 Score
min: 234     avg: 261.2     median: 263 (76%)     max: 271 Points
min: 196.4     avg: 225.1     median: 231 (66%)     max: 256 Points
WebXPRT 3 - WebXPRT 3 Score
min: 302     avg: 319.9     median: 317 (66%)     max: 349 Points
min: 188.4     avg: 262.1     median: 260.5 (54%)     max: 322 Points
CrossMark - CrossMark Overall
min: 1674     avg: 1784     median: 1792 (69%)     max: 1861 Points
min: 1256     avg: 1501     median: 1533.5 (59%)     max: 1804 Points
Power Consumption - Prime95 Power Consumption - external Monitor *
min: 70     avg: 103.1     median: 105.2 (18%)     max: 130.1 Watt
min: 33.1     avg: 45.7     median: 47.2 (8%)     max: 54.7 Watt
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
min: 73     avg: 107.5     median: 110.4 (20%)     max: 134 Watt
min: 36.2     avg: 42.6     median: 41.4 (8%)     max: 50.4 Watt
Power Consumption - Idle Power Consumption - external Monitor *
min: 4.81     avg: 13.3     median: 15.5 (10%)     max: 20.1 Watt
min: 3.38     avg: 8.7     median: 7.2 (5%)     max: 14.9 Watt
Power Consumption - Idle Power Consumption 150cd 1min *
min: 9.82     avg: 15.9     median: 15.6 (17%)     max: 21.5 Watt
min: 3.99     avg: 7.9     median: 6.9 (8%)     max: 15.1 Watt
Power Consumption - Cinebench R15 Multi Power Efficiency - external Monitor
min: 21.9     avg: 26.5     median: 25.5 (19%)     max: 33.8 Points per Watt
min: 42.1     avg: 48     median: 47.1 (35%)     max: 55.1 Points per Watt

Average Benchmarks AMD Ryzen 9 7940HS → 100% n=53

Average Benchmarks AMD Ryzen 7 7840U → 83% n=53

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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v1.26
log 28. 23:44:07

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#1 checking url part for id 15023 +0s ... 0s

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#3 did not recreate cache, as it is less than 5 days old! Created at Thu, 28 Mar 2024 05:35:32 +0100 +0.001s ... 0.001s

#4 composed specs +0.029s ... 0.03s

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#6 getting avg benchmarks for device 14946 +0.022s ... 0.051s

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#8 getting avg benchmarks for device 15023 +0.02s ... 0.133s

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#11 min, max, avg, median took s +0.407s ... 0.58s

#12 return log +0.033s ... 0.613s

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Redaktion, 2017-09- 8 (Update: 2023-07- 1)