The pre-overclocked cards have some of that 'head room' already used up.
And the GTX 560 Ti has a LOT of room for overclocking.
You have to look at the company giving the rebates and the track record for coming through. Usually NewEgg customer Feedback shows when companies start playing games. XFX and PNY look OK to me. Fill out the forms - very carefully - and keep good records.
"windows ranks this cpu at 7.5. cpuz says it runs at 3.7 multiplier at 37x100. get this cpu is amazing even thought is no unlock you can still get up to 3.9 ghz not bad for a lock cpu."- Anonymous Poster on Newegg in the comments section of the I5 2400
there was another poster that said that Intel put a cap on this processor at 3.99, but he also stated it was for all 1155 processors and I know thats incorrect.