I am having major probs with my 3200l ch5l and IS7.. i booted into windows at 250 fsb with 3v and ran 3dmakr with 236 fsb 2.8v with these sticks on an nf7.. on my is7 i can't pass 250 fsb no matter what with any ratio timings or anything. I suspect it has to be the ch5's so i am getting some bh5.. I dug up an old thread somewhere where macci was getting stuck around 255 fsb with any settings with 2 different types of ch5 when he could go 300+ fsb with bh5 sticks.