ezaleina..could you please post your batch# for your 9550? Mine is a C1 also...just got it ~6 weeks ago, and just got my UD3P(rev1.6) <3 weeks ago. You wouldn't believe the voltages i need to get >4.2, i've tried low, medium, and high MCH/VTT/PLL/vCore..and only high gets me there. Only GTLref of .633 will get me there, any higher is a no-go. Here's mine.




My specs:

- Q9550 C1(TRUE-2x Scythe SlipStream-1200rpm{68cfm/ea} push/pull) auxillary fans cooling RAM/NB/VRMs (open bench right now).
- TRUE- slight lapping, washer-shim mod. Temps aren't a problem(21C-22C ambient-28C idle..60C load @ 4.25/1.425v{CPU-Z} )
- EP45-UD3P (r1.6)
- 2x2GB Mushkin XP PC2 8500
- BFG 9800 GTX+ OC(760/2250/1885- factory clocks)stock cooling
- EA650 or VX550.. alternating
- Seagate 500GB 7200.12
- XP Pro SP2(32)
- CM RC690(5x120mm fans+ 2 on TRUE), once serious benching is done