Got my DFI Infinity 975 since the end of august and I'm using it with a B2 retail E6600 Core 2 Cpu. It feels hard to push. The motherboard dislikes my teamgroup ddr667 sticks with official bios if i select 4:3 mode in setup (no boot at all), but it can use that divider with 823 beta release. I must also bring down northbridge temp (i'm changing the heatsink), too much heat for my taste. For now, I tested at 371x9 with ram divider at 4:3, vcore 1.45. It ran orthos for 6h45', next I stopped because it was near midnight and I decided to get to bed. Hope to run benches tomorrow and make an entry in the database.