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AMD Ryzen 9 7940HS

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.

SeriesAMD Phoenix (Zen 4, Ryzen 7040)
CodenamePhoenix-HS (Zen 4)

Series: Phoenix (Zen 4, Ryzen 7040) Phoenix-HS (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
Clock Rate4000 - 5200 MHz
Level 1 Cache512 KB
Level 2 Cache8 MB
Level 3 Cache16 MB
Number of Cores / Threads8 / 16
Power Consumption (TDP = Thermal Design Power)35 Watt
Manufacturing Technology4 nm
Die Size178 mm2
Max. Temperature100 °C
SocketFP7/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, SME
GPUAMD Radeon 780M ( - 2800 MHz)
64 Bit64 Bit support
Architecturex86
Announcement Date01/05/2023
Product Link (external)www.amd.com

Benchmarks

Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU
46.2 pt (64%)
Cinebench 2024 - Cinebench 2024 CPU Single Core
min: 104     avg: 106.3     median: 107 (74%)     max: 108 Points
Cinebench 2024 - Cinebench 2024 CPU Multi Core
min: 824     avg: 917     median: 946 (18%)     max: 972 Points
Cinebench R23 - Cinebench R23 Multi Core
min: 15556     avg: 16867     median: 16946 (16%)     max: 18131 Points
Cinebench R23 - Cinebench R23 Single Core
min: 1733     avg: 1788     median: 1790 (76%)     max: 1832 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 680     avg: 701     median: 702 (78%)     max: 714 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 6277     avg: 6604     median: 6605.5 (16%)     max: 7111 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 2470     avg: 2673     median: 2661 (17%)     max: 2848 Points
01452904355807258701015116013051450159517401885203021752320246526102755Tooltip
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 277     avg: 283.4     median: 283.5 (85%)     max: 288 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 29.8     avg: 30.4     median: 30.5 (40%)     max: 30.88 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 3.34     avg: 3.4     median: 3.4 (84%)     max: 3.46 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 7798     avg: 7866     median: 7837 (47%)     max: 7963 points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 47982     avg: 48859     median: 48751 (35%)     max: 49845 points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
min: 84721     avg: 86849     median: 87296 (61%)     max: 88529 Points
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
min: 14232     avg: 14421     median: 14300 (17%)     max: 14731 Points
wPrime 2.10 - wPrime 2.0 1024m *
min: 66.801     avg: 87.3     median: 97 (1%)     max: 98.222 s
wPrime 2.10 - wPrime 2.0 32m *
min: 2.648     avg: 2.7     median: 2.7 (1%)     max: 2.699 s
WinRAR - WinRAR 4.0
min: 7439     avg: 7503     median: 7490 (12%)     max: 7580 points
7-Zip 18.03 - 7-Zip 18.03 Multli Thread 4 runs
min: 66408     avg: 70912     median: 71085.5 (41%)     max: 73434 MIPS
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 6417     avg: 6645     median: 6651.5 (80%)     max: 6776 MIPS
X264 HD Benchmark 4.0 - x264 Pass 2
min: 140.8     avg: 145.3     median: 144.2 (50%)     max: 150.8 fps
X264 HD Benchmark 4.0 - x264 Pass 1
min: 288     avg: 295     median: 292.5 (67%)     max: 304.5 fps
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 20.1     avg: 21.1     median: 20.9 (37%)     max: 22.6 fps
05101520253035Tooltip
TrueCrypt - TrueCrypt Serpent
min: 1.3     avg: 1.4     median: 1.4 (0%)     max: 1.4 GB/s
TrueCrypt - TrueCrypt AES
min: 14.8     avg: 15     median: 15.1 (39%)     max: 15.2 GB/s
Blender - Blender 3.3 Classroom CPU *
min: 287     avg: 307.6     median: 308 (4%)     max: 331 Seconds
Blender - Blender 2.79 BMW27 CPU *
min: 182     avg: 191.1     median: 189 (1%)     max: 202 Seconds
R Benchmark 2.5 - R Benchmark 2.5 *
min: 0.4159     avg: 0.4     median: 0.4 (9%)     max: 0.4467 sec
3DMark 06 - CPU - 3DMark 06 - CPU
min: 14891     avg: 15630     median: 15689 (33%)     max: 16149 Points
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
min: 7.058     avg: 7.2     median: 7.2 (2%)     max: 7.442 s
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
min: 17.513     avg: 17.9     median: 17.9 (1%)     max: 18.402 s
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
min: 529.929     avg: 572     median: 532.8 (2%)     max: 653.976 s
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
min: 74246     avg: 81139     median: 81099.5 (71%)     max: 86583 Points
3DMark 11 - 3DM11 Performance Physics
min: 16799     avg: 22367     median: 22422 (61%)     max: 25006 Points
3DMark - 3DMark Ice Storm Physics
min: 79935     avg: 88924     median: 89772 (73%)     max: 96559 Points
3DMark - 3DMark Ice Storm Extreme Physics
min: 79450     avg: 88753     median: 89602 (73%)     max: 96418 Points
3DMark - 3DMark Ice Storm Unlimited Physics
min: 85305     avg: 91061     median: 91304.5 (77%)     max: 96047 Points
3DMark - 3DMark Cloud Gate Physics
min: 13400     avg: 19897     median: 20990 (53%)     max: 21353 Points
3DMark - 3DMark Fire Strike Standard Physics
min: 24034     avg: 28183     median: 28247 (50%)     max: 30876 Points
3DMark - 3DMark Time Spy CPU
min: 10388     avg: 11222     median: 11210 (47%)     max: 12212 Points
Geekbench 6.2 - Geekbench 6.2 Single-Core
min: 2426     avg: 2628     median: 2661.5 (72%)     max: 2746 points
Geekbench 6.2 - Geekbench 6.2 Multi-Core
min: 9899     avg: 12333     median: 12348 (49%)     max: 13470 points
Geekbench 5.5 - Geekbench 5.1 - 5.4 64 Bit Single-Core
min: 1823     avg: 1983     median: 1986 (84%)     max: 2032 points
Geekbench 5.5 - Geekbench 5.1 - 5.4 64 Bit Multi-Core
min: 11207     avg: 11902     median: 12111 (22%)     max: 12500 points
Geekbench 5.0 - Geekbench 5.0 64 Bit Single-Core
min: 1764     avg: 1880     median: 1905 (8%)     max: 1918 points
Geekbench 5.0 - Geekbench 5.0 64 Bit Multi-Core
min: 11232     avg: 11682     median: 11526 (36%)     max: 12141 points
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Single-Core
min: 7410     avg: 7923     median: 8014.5 (80%)     max: 8253 points
Geekbench 4.4 - Geekbench 4.1 - 4.4 64 Bit Multi-Core
min: 45905     avg: 47560     median: 47496.5 (52%)     max: 49341 points