AMD's Ryzen 2300X and 2500X CPUs appear on Geekbench

[WYP]

More Ryzen 2nd Gen processors are on the way! Will these CPUs be budget gaming champions?



Read more about AMD's Ryzen 2300X and 2500X CPUs.

 

[demonking]

I wonder why they would half the cache from the 1500X?

 

[WYP]

I wonder why they would half the cache from the 1500X?

Hard to know, though I guess we will find out soon enough. It would be cool if all four cores ran on a single CCX, that would force AMD to lower the L3 Cache size.

 

[grec]

Presumably the performance impact of the inter-CCX communication(And lack of cache coherency) introduced by a 2+2 layout is greater than the impact of halving the L3 cache. I guess having twice the amount of L3 isn't that useful when half the cores have a far higher L3 retrieval latency than the other half, must be an issue in applications that share data access across more than 2 cores. In theory you could make both 8MB chunks of the L3 fully coherent but then you also effectively half the cache size anyway.

I'm pretty sure the 2+2 layout of previous years was purely for yield reasons than performance, with the higher end 2+2 models using the full 16MB more as damage limitation.