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Undervolted i7 920 power usage

post #1 of 3
Thread Starter 
I'm RMA'ing my PSU and have to use an old unit ripped from an HP, so I need to tune everything down for a week or two. Is there a formula I can use to determine the CPU's power draw, or maybe someone here has done this before and has numbers?

Right now it's at .88v (from stock 1.18v). I also got rid of the OC and turned off HT. Also, I'm assuming power usage wouldn't decrease with a further lowered clock, only stability?
post #2 of 3
Im not sure the minimum power draw, just the max which is 130W. I would say you not going to get much lower than 70 - 90W tho regardless of what you do...

If you downclock and lower voltage it will be best, but I would be more worried about your GPU which needs around 140W to run idle and 240 to run load...


What PSU are you going to use?
also consider taking out your 3 x 2TB drives if need be...
The Money Pit
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-950 - 4.24 @ 1.40v Batch #3941B089 EVGA X58 SLI LE MSI 580 GTX Lightning - 950/1900/2200 @ 1.1v 6GB Mushkin @ 1475 - 6-8-6-24 
Hard DriveHard DriveOptical DriveCooling
120GB Vertex Plus 2 x 500GB WD Blues RAID0 Lite-On DVD/CD Custom H20 Loop 
OSMonitorPowerCase
Win 7 Ulti-64 25" I-Inc iH253 Antec TruePower New TP-750 CoolerMaster HAF 932 
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The Money Pit
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-950 - 4.24 @ 1.40v Batch #3941B089 EVGA X58 SLI LE MSI 580 GTX Lightning - 950/1900/2200 @ 1.1v 6GB Mushkin @ 1475 - 6-8-6-24 
Hard DriveHard DriveOptical DriveCooling
120GB Vertex Plus 2 x 500GB WD Blues RAID0 Lite-On DVD/CD Custom H20 Loop 
OSMonitorPowerCase
Win 7 Ulti-64 25" I-Inc iH253 Antec TruePower New TP-750 CoolerMaster HAF 932 
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post #3 of 3
Thread Starter 
Yeah it's cool though, I don't do any 'real' gaming - just emulation

And hey now that I think about it, the stock 920 d0 idles somewhere around ~0.9v, so I guess my max draw now would be 90W? Sounds good to me

Of course I'll turn off the extra HDDs and all the intake fans too, since this PSU I'll be using has very short cables and I gotta keep side panel off... It's a Delta 380W btw
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