Sign in with
Sign up | Sign in
Your question

PSU for Q6600 OC'd, SLi 9800gtx

Last response: in Components
Share
November 14, 2008 2:59:01 PM

Ok, I'm in the middle of piecing some parts together and I'm stumped. I currently have the following:

Asus P5N-D Mobo
Q6600 (hoping to push it to 3.2 GHZ)
8GB OCZ Reaper HPC Edition PC2 6400
2x BFG GeForce 9800 GTX (SLi)
2x WD500GB SATA 3.0Gb/s Drives
2x IDE Drives
2x ASUS 20X DVD±R DVD Burners

I did some reading and found that the 8800gtx takes like 330 watts at extreme load which I'm not sure if thats true. However, I really cannot decide on a PSU to support all the hardware along with being OC'd. Currently I'm debating on a Thermaltake 1200W PSU http://www.newegg.com/Product/Product.aspx?Item=N82E168... but I'm thinking it is a little over kill and I don't want to spend that much on a PSU. Any suggestions or recommendations?

TIA


*Edit

According to the PSU calculator its recommending a 757 watt PSU and with it OC'd its recommending a 988 watt PSU. From what I read on here, http://www.extreme.outervision.com/PSUEngine results would be in extreme/rare occurrences. So Maybe a http://www.newegg.com/Product/Product.aspx?Item=N82E168... will work?

More about : psu q6600 sli 9800gtx

November 14, 2008 4:09:37 PM

i dunno if the 25A 12v rails would make the 8800gtx sli happy. The Thermaltake has 30A which is a slightly noticeable amount more. Hrm, event the 1000W Thermaltake ranked higher then the one you posted (http://www.jonnyguru.com/modules.php?name=NDReviews&op=...). So I wouldn't say the antec is the highest ranked one.
Related resources
November 14, 2008 6:53:58 PM

Even with adding cooling and extra cards on that PSU calculator i only get ~600w i dont know how you got 750w

8800GTX comes in at 231w full load
http://archive.atomicmpc.com.au/forums.asp?s=2&c=7&t=9354

So at 12v they might use 20amp...

Corsair 620HX would run that rig without a hitch, majoity of the time (idle) it would actually sit in the best efficientcy range for the PSU which means less heat and power wastage. If you want something with a bit more left in the tank a solid 750w would be good. 850-1000w is just overkill, 1000w will run TRI SLIed 280gtx with power left just to give you an idea
a b ) Power supply
November 14, 2008 7:11:58 PM

The PC Power & Cooling 750W is actually certified by nVidia for 8800GTX dual SLI. If you buy it today you pay something like $110 - 15%.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703019&Tpk=750W%20Silencer

Here's the complete list, just make sure you pick the right dropdown from it:
http://www.slizone.com/object/slizone_build_psu.html

There's no way an 8800GTX can take 330W. Even the HD 4870 X2 tops at 270W or something like that IIRC.
November 14, 2008 7:13:12 PM

haha just realized something. I went with 2 9800gtx cards not 8800gtx.
November 14, 2008 7:14:28 PM

aevm said:
The PC Power & Cooling 750W is actually certified by nVidia for 8800GTX dual SLI. If you buy it today you pay something like $110 - 15%.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703019&Tpk=750W%20Silencer

Here's the complete list, just make sure you pick the right dropdown from it:
http://www.slizone.com/object/slizone_build_psu.html

There's no way an 8800GTX can take 330W. Even the HD 4870 X2 tops at 270W or something like that IIRC.


decent price. Never even heard of that company before.
November 14, 2008 9:59:18 PM

doublejz said:
haha just realized something. I went with 2 9800gtx cards not 8800gtx.


9800GTX's are actually slightly more power efficient than 8800GTX's...

Aevm's suggestion is a good one, only heard good things about PCP&C
November 15, 2008 12:28:17 AM

Good 500-550w psu would be enough.
November 15, 2008 7:04:58 AM

Definitely go with the PC P&C 750. It's Seasonic built with a single rail at 60A.

$100 after rebate at Newegg.
!