Out of the box this 12GB kit that consists of three 4GB modules carries with it a 2000MHz DDR clock and a 9-10-9-28 timings setup. We're not sure if the kit utilized a 1T or 2T setup since we couldn't find information outside of just the standard timings, but we tried 1T and we didn't run into any problems at 1.65v.
You can see the validation here.
When it came to overclocking we really had no luck. We started at 2100MHz and couldn't get a post, moved to 2050MHz DDR and had the same issue. At around the 2020MHz mark we could get into Windows, but such a small gain isn't worth worrying about.
It's important to remember that 4GB modules are in themselves harder to achieve greater speeds with. When you then combine that with the need to get that on three modules instead of two, the job becomes even more difficult. It would've been nice to see a few more MHz, but the fact that we had no problems at stock speed is the main thing.
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.