AMD Ryzen 5 5600G vs AMD Ryzen 5 8640HS

AMD Ryzen 5 5600G

The AMD Ryzen 5 5600G is a Zen 3-based, desktop-grade APU featuring the Radeon Vega 7 graphics adapter. This Ryzen 5 was unveiled in H1 2021. It features six SMT-enabled CPU cores for 12 threads in total, running at 3.9 GHz to 4.4 GHz.

The CPU ships with AMD's Wraith Stealth cooler (as long as it's not an OEM version).

Architecture

Zen 3-based processors bring a moderate performance boost over Zen 2 generation CPUs. Core counts are left where they were before, while per-MHz performance is getting several percentage points higher.

Ryzen 5 5600G's CPU cores have access to 16 MB of L3 cache. The processor is compatible with DDR4-3200 RAM and has plenty of PCI-Express 3.0 lanes for connecting graphics cards, SSDs and other devices. Four PCI-Express 3.0 lanes allow for read/write rates of up to 3.9 GB/s, provided a sufficiently fast NVMe SSD is used. PCI-Express 4.0 spec is not supported here, since Ryzen 5 5600G is pretty much a laptop-grade SoC in disguise rather than a "proper" desktop chip, like a Ryzen 5 5600X.

You can replace this Ryzen with a faster CPU easily as it uses AMD's AM4 socket interface. Another way to get a performance boost would be to overclock the CPU, which is easy to do with AMD's very own software (many motherboard vendors offer overclocking software of their own as well).

Performance

The six Zen 3 cores will rip through most workloads rutlessly, more demanding ones included (like gaming and high-res video editing). Multi-thread benchmarks put the R5 5600G in the same league as the Core i5-10600K, Core i7-10700, Core i5-11600K, Core i7-11850H. A huge advantage of the Ryzen over the aforementioned alternatives is its decent integrated graphics adapter - more on this below.

Graphics

The Radeon RX Vega 7 iGPU has seven Compute Units (= 448 shaders) and runs at up to 1,900 MHz. It is casual gaming-friendly, allowing one to play most games at 900p / Low quality preset. On the other hand, there is no SUHD 4320p monitor support here, nor can the graphics adapter HW-decode AV1, the latest video codec.

Fast RAM is a prerequisite for decent gaming performance as the Vega has no memory of its own.

Power consumption

This Ryzen 5 is manufactured on TSMC's 7 nm process for great, as of early 2022, energy efficiency.

The chip has a default TDP of 65 W (also known as the long-term Power Limit). According to AMD's guidelines, that 65 W value can be reduced by PC makers significantly, the lower limit being 45 W, resulting in lower temperatures, lower clock speeds and lower performance. Either way, an active cooling solution is a must for a system built around this Ryzen.

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.