I wouldn't be suprised if Chumly or One4 popped their heads up in this thread.
DDR2 had a bad rap at it's release due to nothing more than the high CAS timmings that DDR users were use to having so low. Not that it mattered, but even that is gone. People saw that DDR2 had 4 where their DDR could have 2 in those mysterious digits and simply said it sucked and never grounded the thought that it really didn't matter in this comarison. That's my opinion anyway. But standard DDR in use is 3200, and if you ramp it to DDR2's 4200, you'd find you're using looser timings too.Driver Heaven
DDR2 had quite an uneventful impact onto the scene with poor latencies and results compared to tighter performing DDR, all this has changed since the recent release of the wonderful corsair 5400 sticks.
So with all these high figures, why isnt DDR2 outperforming its older DDR counterpart? Well basically this is all down to latencies of the ram. tight DDR400 memory can operate at 7-2-2 CAS 2 while most 533mhz DDR2 operated at 12-4-4-CAS 4. The looser (higher) latencies have been counterbalancing the effective clock gains.
As OCZ state these modules post at 8-2-2-3 at 533mhz. slowly raising ram speeds i was able to maintain tight timings right up to 720mhz at 7-2-3-4! an awesome overclock for 533mhz rated ram. Higher speeds were possible but I found this figure gave the highest scores. In the picture below you can see a shot of mid testing results with memtest.
You can guess which brand I use