I agree...515x7 would most likely require you to loosen timings. But if you read carefully...what I'm really after is the sweet spot: maximum bandwidth, the same Ram timings at 450 FSB as you would use at 400, and all on the 1067 strap. I believe that spot to be 450 x 8 if the OC target is 3.6 ghz.No higher bandwidth gain either, but rather less bandwidth as you're forced to loosen your RAM timings at the higher FSB.
Take a breath pal. We're just having a friendly discussion here and I certainly value your opinion and view.