Voltage maximum for Corsair TWINX1024XLPRO

Does anyone have any experience using these sticks? I have been able to get my system stable ~PLL 240 and the memory 1:1 @ 2-3-3-5 w/2.8V. Beyond 240 I have to feed the ram 2.9V and relax the timings to 2.5-3-3-5. Is 2.9 safe for these sticks for extended periods of time?

I believe 2.9v would be fine. In fact Corsair's warranty backs up its's sticks up to 2.9v. You can check out alot stuff on Corsair RAM specifically at the Corsair Help Forums.