Ok so I got bored... Figured I'd try to kill something. P4 640 @ 4.65ghz.
This done on air with a MSI P35 Neo2-FR, Noctua C14, and some budget Crusial 2x1gb stick or 800 mhz ddr2. I was trying to get to 300fsb (4.8) but I had the voltage in the bios pushed to 2.1 and I could barely get it to boot 290 fsb.