Performance @ Highest Stable Clock Speed
For our next set of numbers, we focused on the overclockability of Corsair's TWINX1024-3200XLPRO modules on our Intel test bed. Using an unlocked Pentium 4 3.2GHz CPU, we raised the Front Side Bus speed while concurrently lowering our processor's multiplier. We tried to keep the CPU as close to it's stock 3.2GHz clock speed as possible. For these tests, we locked the AGP/PCI speeds at 66MHz/33MHz, raised the CPU voltage to 1.65v, and raised the memory voltage to 2.9v.
These scores illustrate the highest stable clock speeds we were able to hit with the Corsair modules configured with 2-2-2-5 timings, and then again with 2.5-3-3-8 timings. The "stock" scores are the DDR400 numbers with timings set to 2-2-2-5. With the fastest timings, we were able to take these Corsair sticks all the way up to 220MHz (DDR440). At DDR440, bandwidth scores in SANDRA jumped by about 9% in both the ALU and FPU tests. With less aggressive timings, the Corsair sticks actually hit 247MHz (DDR494), which resulted in roughly a 19% increase in bandwidth. With even less aggressive timings, DDR500+ speeds are a definite possibility with these modules.