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Bulldozer and RAM considerations?

post #1 of 4
Thread Starter 
So, with Bulldozer on the horizon i wanted to get your inputs on RAM.

Conventional wisdom has always been that AMD thrives on tighter timings and the clockspeed takes a back seat to lower CL. But considering that we're looking at an entirely new architecture from AMD (first time since 2003, mind you) I'm wondering if anyone has considered the need for greater bandwidth outstripping the need for lower timing?

I know we still havent seen any official benchmarks so this is probably all still speculation at this point, but we do have some idea of how Bulldozer is setup:

Its inheriting the same form of onboard memory controller;
Will have true SSE4 and AVX instruction sets (in fact a fuller instruction set than SB);
The new "module" configuration may have some bearing on this too, as each segment of L1 Cache is shared between 2 "cores" and is much smaller than the 64kb that the current AMD architecture. L2 Cache has the same application.


Now, i'm not a silicone architect, so i'm not sure how this will play out, but my thinking is that Memory bandwidth will be much more crucial with this proc. as it will be handling more threads and sharing less cache across more cores. your thoughts?
    
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post #2 of 4
Bulldozer is the first processor redesign since K8. Phenom II its predecessors have essentially been tweaks upon K8 with nothing major added. Given this fact, I think Bulldozer will actually perform better with higher frequency as opposed to tighter timings at a lower frequency for the memory. Bulldozer will have native 1866mhz support, so I would guess running higher frequency memory like 2133mhz shouldn't be too much of a problem. Phenom II memory controllers, especially on early C2 steppings, couldn't handle very high memory frequencies. Now it's going to change for the better
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post #3 of 4
1866 and at least 9-9-9-24, preferably lower
post #4 of 4
id wait till reviews are out to get a glimpse of how the memory controler works out in terms of timing and speed and its most effective zone of operation
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