I love my current set, 16FD5, running them @ 1066Mhz -- 4-4-4-12 2T 2.17vDIMM (set 2.12 BIOS)

I could run mine @ 1008 Cas 4 2.13Volts, 1120 5-4-4-9 2T 2.15Volts and 1200 2T 5-5-5-15 2.17Volts.

Best freaking DDR2 set Ive ever used!!!