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AMD Ryzen 5 8640U

AMD R5 8640U

The Ryzen 5 8640U is a Hawk Point family processor that was unveiled in Q4 2023. This is not a new chip; instead, it's a rebadged Ryzen 5 7640U with higher clock speeds on the Ryzen AI NPU. Just like the 7640U, the R5 8640U has 6 SMT-enabled cores (12 threads) running at 3.5 GHz to 4.9 GHz. Those Zen 4 architecture cores are mated to the Radeon 760M integrated graphics adapter.

Architecture & Features

Hawk Point family chips are powered by the Zen 4 architecture, much like Phoenix and Dragon Range family chips are. That's not to say there is no difference between the three. With Hawk Point, AMD is betting big on generative AI; these chips are said to deliver an up to 40% increase in generative AI performance over 7040 series APUs making apps like DaVinci Resolve and Adobe Photoshop even more powerful.

Unlike Zen 3, Zen 4 features AVX512 support and, thanks to a plethora of other improvements including larger caches/registers/buffers, is slated to bring a double-digit IPC improvement over the former.

Elsewhere, the 8640U has 16 MB of L3 cache and USB 4 support (therefore, Thunderbolt is supported as well). The chip is compatible with DDR5-5600 and LPDDR5x-7500 RAM which is still impressive as of H2 2023.

A system powered by this Ryzen 5 will have access to twenty PCIe 4 lanes; this means a speedy enough NVMe SSD will be able to deliver speeds up to 7.8 GB/s.

Systems powered by this APU are expected to run 64-bit Windows 11, 64-bit Windows 10, or Linux. Like most laptop chips, the 8640U is neither overclockable nor user-replaceable. It gets soldered down for good (FP7, FP7r2, FP8 socket interfaces).

Performance

It's safe to expect the chip to be at least 10% faster than the Zen 3 Plus-powered Ryzen 5 6600U (6 cores, 12 threads, up to 4.5 GHz).

Your mileage may vary depending on how high the CPU power limits are and how competent the cooling solution of your laptop is.

Graphics

The Radeon 760M has 8 CUs (512 shaders) running at up to 2,600 MHz. This iGPU will happily drive up to 4 monitors with resolutions as high as SUHD 4320p and it also will HW-decode and HW-encode AV1, HEVC, AVC without breaking a sweat. VP9 videos can be decoded but not encoded. As far as gaming is concerned, the average 760M in our database is reasonably close to the GeForce MX550 and the Radeon 680M. In early 2024, this means the latest games can only be played at 1600x900 with most settings set to Low.

Power consumption

The 8640U has a long-term power limit (default TDP) of 28 W that laptop makers are free to change to anything between 15 W and 30 W. Either way, an active cooling solution is a must for any system powered by the chip.

Last but not the least, the 8640U is manufactured on TSMC's 4 nm process for high, as of late 2023, energy efficiency.

CodenameHawk Point-U (Zen 4)
SeriesAMD Hawk Point (Zen 4/4c)

Series: Hawk Point (Zen 4/4c) Hawk Point-U (Zen 4)

AMD Ryzen 7 250 compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 PRO 250 compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 7 8840U compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen Z2 compare3.3 - 5.1 GHz8 / 16 cores16 MB L3
AMD Ryzen 5 230 compare3.5 - 4.9 GHz6 / 12 cores16 MB L3
AMD Ryzen 5 PRO 230 compare3.5 - 4.9 GHz6 / 12 cores16 MB L3
AMD Ryzen 5 8640U « 3.5 - 4.9 GHz6 / 12 cores16 MB L3
Clock Rate3500 - 4900 MHz
Level 1 Cache384 KB
Level 2 Cache6 MB
Level 3 Cache16 MB
Number of Cores / Threads6 / 12
6 x 4.9 GHz AMD Zen 4
Power Consumption (TDP = Thermal Design Power)28 Watt
Manufacturing Technology4 nm
Die Size178 mm2
Max. Temperature100 °C
SocketFP7/FP7r2/FP8
FeaturesDDR5-5600/LPDDR5x-7500 RAM, PCIe 4, Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
GPUAMD Radeon 760M ( - 2600 MHz)
64 Bit64 Bit support
Architecturex86
Announcement Date12/06/2023
Product Link (external)www.amd.com

Benchmarks

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* Smaller numbers mean a higher performance

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Reviews for the AMD Ryzen 5 8640U processor

HP EliteBook 635 Aero G11: AMD Radeon 760M, 13.30", 1 kg
  External Review » HP EliteBook 635 Aero G11

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Benchmarklist of all known CPUs that are used in laptops (desktop and laptop CPUs)

Other CPUs of the series Hawk Point (Zen 4/4c)

» AMD Ryzen 9 270
   8x 4 GHz - 5.2 GHz
» AMD Ryzen 9 8945H
   8x 4 GHz - 5.2 GHz
» AMD Ryzen 9 8945HS
   8x 4 GHz - 5.2 GHz
» AMD Ryzen 9 PRO 8945HS
   8x 4 GHz - 5.2 GHz
» AMD Ryzen 7 260
   8x 3.8 GHz - 5.1 GHz
» AMD Ryzen 7 8845HS
   8x 3.8 GHz - 5.1 GHz
» AMD Ryzen 7 8840HS
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen 7 PRO 8840HS
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen 5 240
   6x 4.3 GHz - 5 GHz
» AMD Ryzen 5 8645HS
   6x 4.3 GHz - 5 GHz
» AMD Ryzen 5 8640HS
   6x 3.5 GHz - 4.9 GHz
» AMD Ryzen 7 250
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen 7 PRO 250
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen 7 8840U
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen Z2
   8x 3.3 GHz - 5.1 GHz
» AMD Ryzen 5 230
   6x 3.5 GHz - 4.9 GHz
» AMD Ryzen 5 PRO 230
   6x 3.5 GHz - 4.9 GHz
» AMD Ryzen 5 8640U
   6x 3.5 GHz - 4.9 GHz
» AMD Ryzen 5 220
   6x 3.2 GHz - 4.9 GHz
» AMD Ryzen 5 PRO 220
   6x 3.2 GHz - 4.9 GHz
» AMD Ryzen 5 8540U
   6x 3.2 GHz - 4.9 GHz
» AMD Ryzen 3 210
   4x 3 GHz - 4.7 GHz
» AMD Ryzen 3 PRO 210
   4x 3 GHz - 4.7 GHz
» AMD Ryzen 3 8440U
   4x 3 GHz - 4.7 GHz

Surrounding CPUs

+ AMD Ryzen 5 PRO 7640U
   6x 3.5 GHz - 4.9 GHz
+ Intel Core Ultra 5 125U
   12x 3.6 GHz - 4.3 GHz
+ Intel Core Ultra 5 134U
   12x 3.6 GHz - 4.4 GHz
+ AMD Ryzen 5 230
   6x 3.5 GHz - 4.9 GHz
+ AMD Ryzen 5 PRO 230
   6x 3.5 GHz - 4.9 GHz
» AMD Ryzen 5 8640U
   6x 3.5 GHz - 4.9 GHz
- AMD Ryzen 5 7640U
   6x 3.5 GHz - 4.9 GHz
- Intel Core Ultra 5 115U
   8x 0.7 GHz - 4.2 GHz
- AMD Ryzen 5 PRO 7540U
   6x 3.2 GHz - 4.9 GHz
- AMD Ryzen 5 220
   6x 3.2 GHz - 4.9 GHz
- AMD Ryzen 5 PRO 220
   6x 3.2 GHz - 4.9 GHz
Klaus Hinum (Update: 2023-12- 9)