AMD Ryzen 5 8645HS

The Ryzen 5 8645HS is an upper mid-range processor (APU) of the Hawk Point family. This isn't an entirely new chip; instead, the 8645HS is a rebadged Ryzen 5 7640HS with higher clock speeds on the Ryzen AI NPU. The 8645HS was brought to life in Q4 2023 and it has 6 SMT-enabled Zen 4 cores (12 threads) running at 4.3 GHz to 5.0 GHz. The Radeon 760M iGPU is responsible for carrying out 3D calculations and similar duties.

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 promised 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 across the board, is slated to bring a double-digit IPC improvement over the former.

Elsewhere, the 8645HS has 16 MB of L3 cache and a super-fast DDR5-5600 / LPDDR5x-7500 RAM controller. USB 4 (and thus Thunderbolt) is supported natively and so is PCIe 4. In fact, 20 PCIe 4 lanes are on offer; data transfer speeds of up to 7.8 GB/s will be possible provided a sufficiently fast NVMe SSD is used.

Systems powered by this Ryzen 5 series chip are expected to run 64-bit Windows 11, 64-bit Windows 10, or Linux. Please note that the APU is not overclockable and neither will you be able to replace it with a faster one as it gets soldered to the motherboard permanently (FP7, FP7r2, FP8 socket interfaces).

Performance

Since the 8645HX is an 7640HS in disguise, it is safe to expect the APU to be about as fast as the Ryzen 9 5900HX, Ryzen 7 6800H, Ryzen 7 7736U and also the Core i5-12500H, 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 system is.

Graphics

The Radeon 760M has 8 CUs (512 shaders) running at up to 2,600 MHz. While this is not the best graphics adapter for gaming as it's only just fast enough for low quality settings and resolutions such as 1600 x 900, it will let you connect up to four SUHD 4320p monitors and it also HW-encodes and HW-decodes the most widely used video codecs such as AV1, HEVC and AVC without breaking a sweat.

Power consumption

The 8645HS has a long-term power limit (default TDP) of 35 W to 54 W, giving laptop makers a choice between improving battery life and giving the system they are working on more oomph. Either way, an active cooling solution is a must for any system powered by the chip.

This Ryzen 5 series APU is built with 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	4300 - 5000 MHz
Level 1 Cache	384 KB
Level 2 Cache	6 MB
Level 3 Cache	16 MB
Number of Cores / Threads	6 / 12 6 x 5.0 GHz AMD Zen 4
Power Consumption (TDP = Thermal Design Power)	45 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

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