I've set AI tuning to manual, CPU freq to 334 and RAM to DDR2 668. BIOS boot screen shows 3.01 GHZ as expected, but also shows dual channel DDR2-4300(533) instead of DDR2 668. In memtest, I get 4198 MB/sec for RAM speeds. I've set CAS 4, RAS-to-CAS 4, RAS precharge 4, RAS activate to prefetch 12, Write recovery of 4, TRFC of 42, TRRD 10, write to read delay 10, read to precharge delay 10, write to precharge delay 11, Static read control to auto.
Let me know, if there's a way to optimize this setup any further. I'd like higher cpu, fsb+memory settings, preferably 400 fsb with DDR2-800 RAM speed, as RAM can run at 800 with 5-5-5-12 comfortably, so motherboard NB and cpu only could need some tweaking of voltages. How high can I raise the CPU+NB voltages on air with default hsf?