this post was submitted on 21 Nov 2023
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For much of the 2010s, we were stuck with mainly dual-core and quad-core CPUs in PCs. However the arrival of Ryzen shook the PC industry, causing a rapid increase in core counts. At the time, there was fervent discussion on this matter, with many questioning if more cores were worth it, and how many cores are more than enough?

So how do things stand today? The latest Intel and AMD consumer processors top out at 24 and 16 cores respectively. What extent of modern software can take advantage of all those cores? What modern workloads are still bottlenecked by single threaded performance?

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[–] [email protected] 1 points 11 months ago (16 children)

Gaming still heavily prefers single threaded performance.

[–] [email protected] 1 points 11 months ago (8 children)

People keep saying this, but does it tho? I've seen multiple benchmarks where 8 slower cores are faster than 6 high speed cores. I would say cache is more important that single threaded performance in 2023.

[–] [email protected] 1 points 11 months ago (2 children)

One thing that gets constantly overlooked in these scenarios is the fact that 8 core CPU's have more L3 cache than 6 core CPU's. so if a game uses 6 threads, an 8 core CPU of the same architecture with the same clock speed will potentially perform better than it's 6 core counterpart.

[–] [email protected] 1 points 11 months ago

That's only true for intel, who disable part of the L3 along with the cores. AMD however has the full L3 enabled on their 6-cores.

The marketing folks love to add up the L2 cache as well, but since that is not shared cache, each core still has the exact same amount of cache available to it, in spite of having a lower number on the spec sheet.

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