Athlon 64 X2 5000+ (Socket AM2)
Posted on: 05/23/2006 05:00 AM

SiSoft Sandra 2007 (cont'd)

I have been a huge fan of Ace's precompiled Linpack binary for a long time. Recently though, we've started running into the limits of the benchmark as it only supports datasets out to 2MB. Since a lot of the modern processors we look at around here have L caches larger than 2MB, Linpack doesn't let us see how bandwidth scales all the way out to main memory. I think SiSoft saw an opening here, and while their Cache/Memory benchmark isn't Linpack, it does do what we need it to do.

Again, everything scales just as you would expect it to. The Athlon 64 has slightly faster cache speed due to its higher clock speed. Again we see that the performance benefits of DDR2 seem to be lost on the current K8, as performance falls right inline with the DDR equipped Opteron system.

What about latency?

When it comes to memory latency the Athlon 64 and its DDR2 appear to have a bit of an advantage once the block size moves out into main memory.

Now that we've gotten the synthetic tests out of the way, let's move on to the "real world" workloads and see if any of the performance trends carry-over.

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