I have to say that even though OCZ say the modules are 7-8-7-20, we thought that it would take a bit of mucking around to get the modules to behave at this frequency. Pleasantly surprised, we moved to 1.66V (Our GIGABYTE board does 1.64v or 1.66v) adjusted our timings and we were in Windows and benchmarking at 2000MHz with the correct timings within minutes.
As for overclocking even further, we were able to boot around 1030MHz and 1040MHz, but performance was a bit flakey. With a bit more time we think you should be able to get the modules benching at these speeds.
Important Editor Note: Our maximum overclocking result is the best result we managed in our limited time of testing the memory. Due to time constraints we weren't able to tweak the motherboard to the absolute maximum and find the highest possible FSB, as this could take days to find properly. We do however spend at least a few hours overclocking every motherboard to try and find the highest possible overclock in that time frame. You may or may not be able to overclock higher if you spend more time tweaking, or as new BIOS updates are released. "Burn-in" time might also come into play if you believe in that.