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Do I need a more powerful power supply?

post #1 of 5
Thread Starter 
I had recently gotten a Xion 90+ Gold Series 700W power supply and I plan on doing some overclocking. I have an i7 920 I want to overclock to about 3.8Ghz, Crossfire 5870's that are running at 900mhz GPU clock and 1300mhz Memory clock. I also am going to watercool my system with 2 loops, 1 loop with dual 140mm's for the video cards and another dual 140mm loop for the processor and north bridge. Also I am going to either overclock my ram to 1600mhz or leave them at 1333mhz I do not know. Would you recommend upgrading to a 850w? Such as the KINGWIN LZG-850 Gold? I could still get my money back for my current power supply saying that it wasn't powerful enough for my system or something like that.

Motherboard: Asus Rampage ii Extreme

I plan on upgrading to the Asus Rampage iii Formula or go to the Sandy Bridge that use less power but are just as good if not better than the i7 920's. What would you do? I am not a huge techie guy but I know for the most part what I'm talking about.
post #2 of 5
700w is enough for 5870 crossfire but xion overrates their power supplies, I'd be doubtful it'd work. a kingwin lazer gold 750w will be more then enough for you.
post #3 of 5
Before buying a GTX470 SLI, i changed my PSU 700W to a 850W, your video cards, are a bit stronger than mine. I recommend an upgrade.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7 960 @3.8Ghz 1.16Vcore Asus P6X58D-E SLI GTX470 PNY XLR8 Edition 3 X 2GB Ballistix Tracer 1454Mhz 
Hard DriveOptical DriveOSMonitor
2 X 1TB Barracuda Sata II 32MB Bluray writer Win 7 X64 Ultimate SyncMaster 2232BW 22'' 
KeyboardPowerCaseMouse
Microsoft wireless 5000 GameXtream 850W NZXT Lexa Black (aluminium) Microsoft wireless 5000 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
I7 960 @3.8Ghz 1.16Vcore Asus P6X58D-E SLI GTX470 PNY XLR8 Edition 3 X 2GB Ballistix Tracer 1454Mhz 
Hard DriveOptical DriveOSMonitor
2 X 1TB Barracuda Sata II 32MB Bluray writer Win 7 X64 Ultimate SyncMaster 2232BW 22'' 
KeyboardPowerCaseMouse
Microsoft wireless 5000 GameXtream 850W NZXT Lexa Black (aluminium) Microsoft wireless 5000 
  hide details  
Reply
post #4 of 5
Quote:
Originally Posted by vsmith View Post
Before buying a GTX470 SLI, i changed my PSU 700W to a 850W, your video cards, are a bit stronger than mine. I recommend an upgrade.
Ati uses less power than NVidia
wayyyyyyy less
post #5 of 5
Quote:
Originally Posted by AK-47 View Post
Ati uses less power than NVidia
wayyyyyyy less
HE would have been fine with 750w with his 470 sli..
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