What does Level 3 cache has to do with GPUs?

[MPDota]

I was watching some benchmark tests on youtube and the guy said "That said tho it does(Ryzen 1600) have twice as much cache on offer (than Ryzen 1400). However if you use a mid range graphics card, or anything less GTX 1080 then cache capacity makes little no no difference".


So can anyone explain this to me, since i don't get it? Do i need some specific cache capacity on a CPU for higher end GPUs and why?

 

[chemmajorp53]

The hardware unboxed video right? I'm not some hardware genius, but what I'd imagine is happening is that there are a few situations in that the extra 8mb can be used for a little extra boost in performance. Whether that performance increase comes from having 2 modules of L3 cache on the 1500X as opposed to 1 or the CPU actually using more than 8mb I don't know. However, the more and more CPU bound you get, the more evident that small difference is going to get. I'd imagine it's less about the specific GPU and more about how hard the CPU is working, the 1500X doesn't have to work as hard to keep up with an RX 480 at 1080p as it does a 1080 or 1080 ti. You'd probably get the same difference in FPS if you had a GTX 1060 and put the game on 720p low settings. No, you don't need a specific cache capacity. 8mb is fine, the 7700k only has 8 and it's the fastest gaming CPU on the market by a not insignificant margin. Extra L3 cache will primarily impact workstation performance