Quote Originally Posted by raju View Post
A fully loaded Xeon W3540 running Linx at 4.45GHz, EPS draw is around 21.5 amps. Around 250W of total draw on EPS 12V - 15~20% switching loss, 40w to VTT, around 160w to VCC. Do you think a 870 @ 4GHz pulls more to VCC than a Xeon W3540?
i dont know about an 870...
where do you get the 15-20% switching loss though?
the pwm engineers at foxconn told me the load efficiency of the p6t, gigabyte x58 extreme and BR are all around 90%

im sure the "24phase" thing from gigabyte has a worse efficiency though...
but this is a 1366 cpu, so i guess you meassured it on the evga 1366 digital pwm? if the efficiency is around 90% you get 25W more for vcc, around 185W...

even if the efficiency is really only 80-85%, i wouldnt be surprised if the low temperature is making quite a diference here, and current draw at higher temps is notably diferent.