Geez.. Why would anyone buy these new E6X50 chips? My E6600 from week 26th of 2006 does 3.60GHz with 1.31V (BIOS) - 1.27~1.29V (Windows). Yeah maybe X6850 is binned better and could do ~4.0GHz, but at what vCore? Is it worth it? Plus the lower multiplier and looser strap... The only thing going for them looks like lower temps to me.

Anyone who already has an E6x00 and wants to upgrade has only 1 choice - Q6600.