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Setting up 8800 GTX SLI... do i need a new PSU??

Forum Graphic & Displays : Graphics Cards - Setting up 8800 GTX SLI... do i need a new PSU??

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NXPS   08-19-2008 at 05:35:35 PM

Hi there,
I absolutely love my current 8800 GTX and am getting 25fps all high in 1900 x 1920 in Crysis which is reasonable, but by no means good. I want to get another one and SLI them up. I have the nvidia 590 mobo so thats all good, the only thing im concerned about is my PSU.. its 750w but it only has two 6 pins... do i need another PSU with at least 4 6 pins? or can i use some sort of module or adapter to get SLI working with my current PSU.

I bought a 9800gx2 but had to return it becuase it was performing so poorly with Crysis!! Much worse than my single 8800GTX.

If anyone has any other opinions on how i can gain more FPS in Crysis, this would be much appreciated. Iv played the game thro 3 times, but to say i am obsessed with it is an understatement!

Rig
XPS 710
Core 2 Duo E6600 2.40 Mhz
4 Gig ram 667Mhz
Nvidia 590i SLI MoBo
500 GB Raid 0 HDD
nVidia 8800 GTX - Driver 177.19
2 Optical Drives
750w Standard Dell PSU

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Kaldor   08-19-2008 at 09:41:53 PM
- 2 +

Power supply will probably run it. But no guarantees. New GTXs ship with adapters that will turn a standard 12v into a 6 pin PCI-E plug.

 

However Id be more concerned about the 590 SLI mobo.

 

Id be more inclined to sell the entire machine and build from scratch as relying on or upgrading a Dell is shakey at best.


Message edited by Kaldor on 08-19-2008 at 09:47:19 PM
Reply to Kaldor
outlw6669   08-19-2008 at 10:24:10 PM
- 0 +

What is the +12v amperage on your Dell PSU?
Assuming it is up to par, you will need a pair of These, assuming they don't already come with the GPU.

------------------------------ If the automobile had followed the same development cycle as the computer, a Rolls-Royce today would cost $100, get a million miles to the gallon, and explode once a year, killing everyone inside.
PSA
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iluvgillgill   08-19-2008 at 10:34:00 PM
- 0 +

i though Dell are build in a way that wouldnt let you upgrade?!no?

and i think you need to upgrade the PSU as dell only put in bare minimum for the PC to work.

Reply to iluvgillgill
Nik_I   08-19-2008 at 10:48:59 PM
- 0 +

from what i've heard, dell under-rates their psus, which may or may not still be true. i would honestly be more concerned about the motherboard. also, unless you're buying a used one for cheap, i would suggest getting rid of your current 8800GTX, possibly sell that one on ebay, and buy a 4870x2, or a 4850x2.

Reply to Nik_I
iluvgillgill   08-19-2008 at 10:53:10 PM
- 0 +

really i would just get a completely new rig instead!

Message quoted 1 times
Reply to iluvgillgill
Nik_I   08-19-2008 at 10:54:12 PM
- 0 +

iluvgillgill wrote :

really i would just get a completely new rig instead!



thats not a terrible idea either. it is a bit dated.

Reply to Nik_I
themyrmidon   08-19-2008 at 11:04:58 PM
- 0 +

Not everyone's made of money, that setup is still pretty darn good.
On the PSU, I would get a new one, maybe a Corsair TX750W, simply because I don't trust factory PSU's.

Reply to themyrmidon
outlw6669   08-19-2008 at 11:13:17 PM
- 0 +

Nothing wrong with that rig.
An E6600 might only be a midrange CPU today but it is still nothing to shake a stick at.
The 590i SLI offers full 16x 16x SLI so what's the problem upgrading it?

------------------------------ If the automobile had followed the same development cycle as the computer, a Rolls-Royce today would cost $100, get a million miles to the gallon, and explode once a year, killing everyone inside.
PSA
 Reply to outlw6669
jerreece   08-19-2008 at 11:38:51 PM
- -1 +

The biggest limiting factor is the fact that Crysis supposadly doesn't scale well with SLI. So this whole upgrade may or may not net a very big FPS boost.

------------------------------ i5-750 @ 2.66Ghz / Gigabyte GA-P55-UD4P / Xigmatek HDT-S1283 (Waiting for Bracket)
2 x MSI GTX 260 Core 216 SLI (655Mhz) / 4GB GSkill DDR3 1600 9-9-9-24 @1.5v
2 x WD Caviar Black 1TB / Thermaltake Armor BWS8003
Win 7 64bit / Antec TPQ-850
 Reply to jerreece
cjl   08-19-2008 at 11:50:53 PM
- 1 +

I thought crysis scaled quite well with SLI, it was CF that had trouble. Oh, and I'd tend to think that PSU would be fine, though if you do want to replace it, dell uses standard ATX units in the XPS gaming computers.


Message edited by cjl on 08-19-2008 at 11:51:25 PM
Reply to cjl
invisik   08-20-2008 at 12:48:47 AM
- 1 +

crysis scales pretty well with sli. @ 1680x1050, all very high, 16aa. my single gtx 260 get around 18-24fps with my 2 gtx260 in sli i get 28-35fps.
as for the psu if it has 40+amps on the 12vrail it should be fine.


Message edited by invisik on 08-20-2008 at 12:51:03 AM
------------------------------ intel core 2 quad q6600 @3.2ghz msi p6n diamond (X-FI Extreme sound) 6gig of OCZ+CoRSAIR oc 900mhz Nvidia gtx 260 sli @ 730/1465/1250
Lite-On Blue-ray Western Digital 7200rpm 500gb Antec 500 Earthwatt Window vista 64-bit
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Carlos_will   11-10-2008 at 03:14:37 PM
- 0 +

Hey guys, I was never too kean on trying out SLI, but lately I have taken interest in it, but I'm wondering on what to do really... These are my current specs:

- XFX 8800GTX XT edition 768mb
- Intel D975XBX2 (planning on replacing it with an MSI P7N SLI Platinum nForce 750i)
- Q6600 OC'ed to 3.0
- 4GB DDR2 PC6400 Corsair XMS2 DHX 834Mhz
- 500GB 7200rpm Maxtor
- 20" Samsung syncmaster 205bw

I game at the native resolution of 1680x1050 ofcourse. But the real question is:

'Would I get better fps with another 8800gtx and put that in SLI ?'

OR...

Should I just buy 2 260 gtx's and put them in SLI.

I would appreciate any opinions on this matter,

thanks people.

Reply to Carlos_will
L1qu1d   11-10-2008 at 03:23:03 PM
- 0 +

ur better off getting 1 GX2 for the price of the 8800 GTX :P. Crysis actually doesn't scale too well with sli or crossfire (it scales better in SLI though, thank Nvidia). I think its around 30% scaling but I'm not sure. :P Crysis warhead doesn't scale as well as Crysis though.

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