
We’ve already talked about the complicated situation with the AMD Ryzen processor family. Despite being in the same generation or having similar nomenclature, the red side of the force eventually reduces some specifications too much in some models.
The AMD Ryzen 5 8500G fits well in this area. It still maintains the six cores and 12 threads like the Ryzen 5 8600G, it still has good RDNA 3 integrated graphics… but it has some big gotchas.
Pitfalls of the AMD Ryzen 5 8500G
The first problem with the Ryzen 5 8500G is that it doesn’t have all of its cores based on Zen4, like the 8600G. The 8500G has just two Zen4 cores combined with another type of core, Zen4c.
This Zen4c core was made to optimize space, so it has a much reduced area compared to the traditional Zen4:
This technology was introduced together with AMD Epyc processors, with the aim of enabling servers with higher core densities. But this reduction is not without consequences. The first is a reduction in the amount of L3 cache.

This doesn’t affect the 8500G as much compared to the 8600G because both only have 16MB of L3 cache. But the difference that affects the most is the clocks. Zen4c cores operate at slightly lower clocks. The Zen4 base on this processor is 4.1GHz with a boost to 5.0GHz, while the Zen4c cores operate at 3.2GHz with a boost of up to 3.7GHz, an important difference that is evident in performance tests focused on the CPU.
In the single-thread test this is not evident, after all the 8500G can use its faster Zen4 core. But it is necessary to force the use of all cores to see the performance drop caused by the 4 Zen4c cores.

CineBENCH
In CineBENCH the result is not so bad, after all it is still in the ballpark of a Core i5-12400F, but in other tests where the smaller amount of cache impacts more, we see it starting to fall between the Core i3-13100 and the Core i5 -12400. Detail: the Core i3-13100 has fewer cores and threads, but makes up for it with superior thread performance.

3DMark em CPU
Although not extraordinary, the processor performance still seems sufficient. And what does the integrated graphics look like? The AMD Radeon 740M drops the RDNA 3 computational unit count from 8 to just 4, compared to the Ryzen 5 8600G’s Radeon 760M. This has a significant impact on performance, but looking at tests with games, it doesn’t seem to be a problem:

3DMark em iGPU

Counter Strike 2 em iGPU

Call of Duty Modern Warfare III iGPU

Cyberpunk 2077 iGPU
The performance is cool, with several moments where this processor is better than the best product in the 5000G series, the Ryzen 7 5700G. In practice it also performed well, being quite possible to play Fortnite and Counter Strike 2, as we tested live.
Installing a video card
But perhaps the most critical is the reduction in PCIe lines. The Ryzen 5 8500G has PCIe 4.0 lines reduced from the 16 usable on the Ryzen 5 8600G to just 10. And of those, only x4 can be dedicated to graphics cards!
This creates a serious problem of limiting the bandwidth available for video card communication, and leaves a serious “bouncing” bottleneck to occur. This problem is partially alleviated if you use PCI Express 4.0 technology, which has twice the bandwidth per channel compared to PCIe 3.0, but is still in a risk area.
But better than theory is seeing it in practice. And the results… are not that alarming.

3DMark com RTX 4090

Assassin’s Creed Valhalla com RTX 4090

Baldur’s Gate 3 com RTX 4090

Call of Duty Modern Warfare III com RTX 4090

Counter Strike 2 com RTX 4090

Cyberpunk 2077 com RTX 4090

Red Dead Redemption 2 com RTX 4090
The low bandwidth does not have a much greater influence than we would expect from the fact that the processor is less powerful. Much of the time it surprises in the opposite direction, with performance almost equal to that of the Ryzen 5 8500G.
And when the system’s performance depreciates further, as in COD MW III, it is 20% behind the 8600G but is still tied with the Core i5-12400F and delivering an average of 190FPS. In other words, even when it’s bad, it’s not that bad!
Source: https://www.adrenaline.com.br/videos/nao-sei-se-deviamos-recomendar-esse-amd-ryzen-5-8500g/