Notebookcheck Logo

AMD Ryzen 9 9955HX vs AMD Ryzen 9 8945HX

AMD Ryzen 9 9955HX

► remove from comparison AMD R9 9955HX

The AMD Ryzen 9 9955HX is a high-end notebook processor from the Fire Range series with 16 cores and hyperthreading (SMT), which means it can process up to 32 threads simultaneously. Unlike the Ryzen 9 9955HX3D, the chip does not offer a 3D V-Cache. The chip was presented at CES in early 2025 and is intended for fast and expensive gaming laptops.

Thanks to the high-clocked 16 Zen 5 cores, the performance of the CPU should be excellent and only be outperformed by the 9955HX3D thanks to the 3D V-Cache. Together with the Intel Core Ultra 9 285HX at the top of the mobile CPUs.

The 9955HX is intended for large and heavy gaming notebooks and is therefore configurable from 55-75 watts TDP (default 55 watts). The SoC is manufactured in the modern 4nm FinFET process at TSMC (both compute dies, I/O die in 6nm) and should therefore have very good energy efficiency.

AMD Ryzen 9 8945HX

► remove from comparison Ryzen 9 7945HX Dragon Range CPU

The AMD Ryzen 9 8945HX is the top 16-core Dragon Range refresh lineup laptop processor that debuted in April 2025. The product offers 16 SMT-enabled Zen 4 cores (32 threads) running at 2.5 GHz to 5.4 GHz, along with a rather basic Radeon 610M RDNA 2 architecture iGPU. This Ryzen 9 8000 APU is essentially a rebadged Ryzen 9 7945HX.

The 8945HX is composed of three dies made on two different nodes (5 nm for CPU cores; 6 nm for other componentry). It features a very healthy 28 PCIe 5 lanes for connecting graphics cards and SSDs as fast as 15.75 GB/s. The RAM controller is limited to DDR5-5200 or slower; there is no NPU and no Thunderbolt support, the product page on amd.com indicates, but the clock multiplier is unlocked for easy overclocking.

Performance

While we have not tested a single system featuring the 8945HX as of April 2025, we have reviewed multiple systems built around the 7945HX. In Cinebench benchmarks, it has no trouble leaving the mighty Ryzen AI Max+ 395 behind by a few percentage points.

With this many cores, the APU will probably do a much better job serving content creators rather than gamers.

Power consumption

Much like the 7945HX, the 8945HX has a base TDP (long-term power limit) of 55 watts that can officially be jacked up to as high as 75 watts. However, most of the 7945HX systems tested by Notebookcheck had an even higher value of 100+ watts. To dissipate this much heat, a couple of high-RPM fans are a must.

ModelAMD Ryzen 9 9955HXAMD Ryzen 9 8945HX
CodenameFire Range-HX (Zen 5)Dragon Range refresh (Zen 4)
SeriesAMD Dragon Range (Zen 4, Ryzen 7X4X/8X4X)AMD Dragon Range (Zen 4, Ryzen 7X4X/8X4X)
Series: Dragon Range (Zen 4, Ryzen 7X4X/8X4X) Dragon Range refresh (Zen 4)
AMD Ryzen 9 9955HX3D compare - 5.4 GHz16 / 32 cores128 MB L3
AMD Ryzen 9 9955HX « - 5.4 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 9850HX compare3 - 5.2 GHz12 / 24 cores64 MB L3
AMD Ryzen 9 8945HX « 2.5 - 5.4 GHz16 / 32 cores64 MB L3
AMD Ryzen 9 8940HX compare2.4 - 5.3 GHz16 / 32 cores64 MB L3
AMD Ryzen 7 8840HX compare2.9 - 5.1 GHz12 / 24 cores64 MB L3
AMD Ryzen 7 8745HX compare3.6 - 5.1 GHz8 / 16 cores32 MB L3
Clock <=5400 MHz2500 - 5400 MHz
L1 Cache1.3 MB1 MB
L2 Cache16 MB16 MB
L3 Cache64 MB64 MB
Cores / Threads16 / 32
16 x 5.4 GHz AMD Zen 5
16 / 32
16 x 5.4 GHz AMD Zen 4
TDP55 Watt55 Watt
iGPUAMD Radeon 610M ( - 2200 MHz)AMD Radeon 610M ( - 2200 MHz)
Architecturex86x86
Announced
Manufacturerwww.amd.comamd.com
TechnologyCCD = 5nm, I/O = 6 nm
max. Temp.100 °C
SocketFL1
FeaturesDDR5-5200 RAM, PCIe 5, 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, SME

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - R9 9955HX
50 pt (83%)
Restrict / Search: Model: Max. age: years
Cinebench 2024 - Cinebench 2024 CPU Single Core
min: 125.3     avg: 128.6     median: 129.5 (73%)     max: 130 Points
Cinebench 2024 - Cinebench 2024 CPU Multi Core
min: 1775     avg: 1982     median: 2041.5 (38%)     max: 2069 Points
Cinebench R23 - Cinebench R23 Multi Core
min: 36078     avg: 38701     median: 39518 (37%)     max: 39690 Points
Cinebench R23 - Cinebench R23 Single Core
min: 1828     avg: 2090     median: 2174 (91%)     max: 2183 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 819     avg: 844     median: 851 (93%)     max: 853 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 14166     avg: 15105     median: 15364.5 (37%)     max: 15524 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 5671     avg: 5985     median: 6083 (38%)     max: 6103 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 320     avg: 332.5     median: 336.5 (93%)     max: 337 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 65.35     avg: 68.3     median: 69.5 (90%)     max: 69.87 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 3.72     avg: 3.9     median: 3.9 (93%)     max: 3.97 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 8710     avg: 9022     median: 9148 (55%)     max: 9209 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 73626     avg: 76988     median: 77186 (56%)     max: 80152 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
138015 Points (88%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
17343 Points (21%)
wPrime 2.10 - wPrime 2.0 1024m *
min: 33.917     avg: 119.1     median: 119.1 (1%)     max: 204.3 s
wPrime 2.10 - wPrime 2.0 32m *
min: 2.244     avg: 3.9     median: 3.9 (1%)     max: 5.6 s
WinRAR - WinRAR 4.0
min: 9033     avg: 27340     median: 27340 (43%)     max: 45647 Points
7-Zip 18.03 - 7-Zip 18.03 Multi Thread 4 runs
min: 132435     avg: 139974     median: 141698 (81%)     max: 144064 MIPS
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 7061     avg: 7286     median: 7309.5 (86%)     max: 7462 MIPS
X264 HD Benchmark 4.0 - x264 Pass 2
233.5 fps (78%)
X264 HD Benchmark 4.0 - x264 Pass 1
359 fps (83%)
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 38.9     avg: 41.9     median: 42.8 (75%)     max: 43 fps
TrueCrypt - TrueCrypt Serpent
min: 3.1     avg: 3.1     median: 3.1 (91%)     max: 3.4 GB/s
TrueCrypt - TrueCrypt Twofish
4.9 GB/s (84%)
TrueCrypt - TrueCrypt AES
27.9 GB/s (73%)
Blender - Blender 3.3 Classroom CPU *
min: 122     avg: 128.8     median: 124 (2%)     max: 145 Seconds
Blender - Blender 2.79 BMW27 CPU *
min: 80     avg: 84.5     median: 83.5 (1%)     max: 91 Seconds
R Benchmark 2.5 - R Benchmark 2.5 *
min: 0.3517     avg: 0.4     median: 0.4 (8%)     max: 0.3618 sec
3DMark 06 - CPU - 3DMark 06 - CPU
min: 19498     avg: 20060     median: 19791 (42%)     max: 20890 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 7.701     avg: 8     median: 8 (2%)     max: 8.2 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 16.472     avg: 17     median: 17 (1%)     max: 17.5 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
375.8 s (2%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 98094     avg: 99402     median: 98457 (76%)     max: 101654 Points
3DMark 11 - 3DM11 Performance Physics
min: 29429     avg: 31835     median: 32753 (81%)     max: 32984 Points
3DMark - 3DMark Ice Storm Physics
min: 78557     avg: 80812     median: 80812 (66%)     max: 83067 Points
3DMark - 3DMark Ice Storm Extreme Physics
min: 78596     avg: 80117     median: 80117 (65%)     max: 81638 Points
3DMark - 3DMark Ice Storm Unlimited Physics
min: 81426     avg: 81504     median: 81504 (68%)     max: 81582 Points
3DMark - 3DMark Cloud Gate Physics
min: 23962     avg: 23963     median: 23962.5 (61%)     max: 23963 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 37802     avg: 41522     median: 42890 (76%)     max: 44312 Points
3DMark - 3DMark Time Spy CPU
min: 9758     avg: 12274     median: 12782 (54%)     max: 13188 Points
Geekbench 6.4 - Geekbench 6.4 Single-Core
min: 3175     avg: 3217     median: 3224.5 (81%)     max: 3244 Points
Geekbench 6.4 - Geekbench 6.4 Multi-Core
min: 16313     avg: 18544     median: 19137 (74%)     max: 19587 Points
Geekbench 6.0 - Geekbench 6.0 Single-Core
3105 Points (99%)
Geekbench 6.0 - Geekbench 6.0 Multi-Core
21003 Points (86%)
Geekbench 5.5 - Geekbench 5.1 - 5.5 64 Bit Single-Core
min: 2307     avg: 2385     median: 2405 (94%)     max: 2423 Points
Geekbench 5.5 - Geekbench 5.1 - 5.5 64 Bit Multi-Core
min: 20576     avg: 21803     median: 22114 (40%)     max: 22406 Points
Geekbench 5.0 - Geekbench 5.0 64 Bit Single-Core
2233 Points (10%)
Geekbench 5.0 - Geekbench 5.0 64 Bit Multi-Core
20686 Points (65%)
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Single-Core
9140 Points (91%)
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Multi-Core
87050 Points (87%)
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
min: 397     avg: 405.3     median: 403 (0%)     max: 418 ms
WebXPRT 4 - WebXPRT 4 Score
min: 297.6     avg: 308.2     median: 306.5 (84%)     max: 322 Points
WebXPRT 3 - WebXPRT 3 Score
min: 315     avg: 338     median: 338 (61%)     max: 361 Points
CrossMark - CrossMark Overall
min: 2176     avg: 2210     median: 2202 (82%)     max: 2259 Points
Power Consumption - Prime95 Power Consumption - external Monitor *
min: 122.3     avg: 175.7     median: 175.7 (30%)     max: 229 Watt
Power Consumption - Cinebench R15 Multi Power Consumption - external Monitor *
min: 143.7     avg: 182.4     median: 182.4 (33%)     max: 221 Watt
Power Consumption - Idle Power Consumption - external Monitor *
min: 19.3     avg: 21.9     median: 21.9 (14%)     max: 24.5 Watt
Power Consumption - Idle Power Consumption 150cd 1min *
25.2 Watt (28%)
Power Consumption - Power Efficiency - Cinebench R15 Multi external Monitor
39.5 Points per Watt (29%)

Average Benchmarks AMD Ryzen 9 9955HX → 0% n=0

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

Add one or more devices and compare

In the following list you can select (and also search for) devices that should be added to the comparison. You can select more than one device.

restrict list:
v1.33
log 27. 10:20:01

#0 ran 0s before starting gpusingle class +0s ... 0s

#1 checking url part for id 18731 +0s ... 0s

#2 checking url part for id 19594 +0s ... 0s

#3 redirected to Ajax server, took 1753604401s time from redirect:0 +0s ... 0s

#4 did not recreate cache, as it is less than 5 days old! Created at Fri, 25 Jul 2025 05:17:52 +0200 +0s ... 0s

#5 composed specs +0.005s ... 0.005s

#6 did output specs +0s ... 0.005s

#7 getting avg benchmarks for device 18731 +0.004s ... 0.009s

#8 got single benchmarks 18731 +0.009s ... 0.017s

#9 getting avg benchmarks for device 19594 +0.001s ... 0.018s

#10 got single benchmarks 19594 +0s ... 0.018s

#11 got avg benchmarks for devices +0s ... 0.018s

#12 min, max, avg, median took s +0.028s ... 0.046s

#13 return log +0.001s ... 0.047s

Please share our article, every link counts!
Mail Logo
> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2023-07- 1)