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Old 15-06-18, 01:13 PM
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AMD's Ryzen 2300X and 2500X CPUs appear on Geekbench

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.

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Old 15-06-18, 01:55 PM
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I wonder why they would half the cache from the 1500X?
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Old 15-06-18, 03:34 PM
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Quote:
Originally Posted by demonking View Post
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.
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Old 16-06-18, 03:14 PM
tgrech tgrech is offline
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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.
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