Quote Originally Posted by Fuji
wait hold up. If DDR2 has the same latency as DDR why does performance go down with AMD with AM2? Cause on paper, they have the same latency, but in reality it's different.

And 12ns is the actual time your CPU waits for ram right? Not the total latency it takes to make it's way to the CPU yes? Cause I heard that Opteron had a total latency of like 80ns.
there are many ways of measuring latency.
DDR2-800@4-4-4-10 and DDR-400@2-2-2-5 on AMD System, performance goes up with the move from DDR to DDR2.
The reason you heard about AMD's losing performance on DDR2 is because they were using Memory with worse latency. The latency for DDR2-800@4-4-4-10 is about equal to DDR-400@2-2-2-5