Oddly this still seems to be somewhat unanswered.
If this is an answer to my question - I was asking about BIOS upgrade 😉
Quick question - what version of the BIOS should I install for x5650 ??
OK, I'll answer to myself 🙂
Updated today to A16 - the latest version - and was able to post to BIOS with 1x x5650.
Haven't tried to go all the way to Windows 7 - just in case 1x CPU will do something bad to OS.
Right now - the same 2x x5570 as before the update - are still working perfectly fine 🙂
Motherboard - D881F.
T021F is the Aluminum Heatsink and its not for higher power processors. More specific information would come from Dell.
I'm not Dell.
U106F is for the 3500 5500 7500
W715F is the Shroud/Fan over the Heatsink on the 5500.
"W715F is the Shroud/Fan over the Heatsink on the 5500"
Yeah that's for the riser board cpu. I got the performance heatsink U016F on order so will see if that will fix the problem. Too bad there is no shroud around the primary heatsink like on the 7500.