AMD Ryzen 5 8640HS

The Ryzen 5 8640HS is a mid-range, Hawk Point family processor that was unveiled in Q4 2023. The 8640HS isn't actually a new chip; instead, it's a rebadged Ryzen 5 7640U with a slightly higher wattage as well as higher clock speeds on the Ryzen AI NPU. The 8640HS 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 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 processors are set to deliver an up to 40% increase in generative AI performance over 7040 series APUs.

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

Elsewhere, the 8640HS 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 late 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 8640HS is neither overclockable nor user-replaceable. It gets soldered to the motherboard for good (FP7, FP7r2, FP8 socket interfaces).

Performance

It's safe to expect the APU to be at least 15% faster than the Zen 3 Plus-powered Ryzen 5 6600U (6 cores, 12 threads, up to 4.5 GHz), as far as multi-thread performance is concerned.

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. While not great for gaming (unless you are fine with resolutions such as 900p and low detail settings), the iGPU will let you use up to 4 monitors with resolutions as high as SUHD 4320p. It also HW-decodes and HW-encodes the most widely used video codecs including AV1, HEVC, AVC without breaking a sweat.

Power consumption

The 8640HS has a long-term power limit (default TDP) of 28 W that laptop makers are free to change to anything between 20 W and 30 W. Most companies will probably go for a higher value to get better performance. Either way, an active cooling solution is a must for any system powered by the chip.

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

Codename	Hawk Point-HS (Zen 4)
Series	AMD Hawk Point (Zen 4/4c)
Series: Hawk Point (Zen 4/4c) Hawk Point-HS (Zen 4) AMD Ryzen 9 270 4 - 5.2 GHz 8 / 16  16 MB L3 AMD Ryzen 9 8945H 4 - 5.2 GHz 8 / 16  16 MB L3 AMD Ryzen 9 8945HS 4 - 5.2 GHz 8 / 16  16 MB L3 AMD Ryzen 9 PRO 8945HS 4 - 5.2 GHz 8 / 16  16 MB L3 AMD Ryzen 7 260 3.8 - 5.1 GHz 8 / 16  16 MB L3 AMD Ryzen 7 8845HS 3.8 - 5.1 GHz 8 / 16  16 MB L3 AMD Ryzen 7 8745HS 3.8 - 4.9 GHz 8 / 16  16 MB L3 AMD Ryzen 7 8840HS 3.3 - 5.1 GHz 8 / 16  16 MB L3 AMD Ryzen 7 PRO 8840HS 3.3 - 5.1 GHz 8 / 16  16 MB L3 AMD Ryzen 5 240 4.3 - 5 GHz 6 / 12  16 MB L3 AMD Ryzen 5 8645HS 4.3 - 5 GHz 6 / 12  16 MB L3 AMD Ryzen 5 8640HS « 3.5 - 4.9 GHz 6 / 12  16 MB L3
Clock Rate	3500 - 4900 MHz
Level 1 Cache	384 KB
Level 2 Cache	6 MB
Level 3 Cache	16 MB
Number of Cores / Threads	6 / 12 6 x 4.9 GHz AMD Zen 4
Power Consumption (TDP = Thermal Design Power)	28 Watt
Manufacturing Technology	4 nm
Die Size	178 mm2
Max. Temperature	100 °C
Socket	FP7/FP7r2/FP8
Features	DDR5-5600/LPDDR5x-7500 RAM, PCIe 4, Ryzen AI, AES, AVX, AVX2, AVX512, FMA3, MMX (+), SHA, SSE, SSE2, SSE3, SSE4.1, SSE4.2, SSE4A, SSSE3
GPU	AMD Radeon 760M ( - 2600 MHz)
64 Bit	64 Bit support
Architecture	x86
Announcement Date	12/06/2023
Product Link (external)	www.amd.com

Benchmarks