Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Settiing up 8800GTX in SLI - need help!

Settiing up 8800GTX in SLI - need help!

Forum Graphic & Displays : Graphics Cards - Settiing up 8800GTX in SLI - need help!

Tom's Hardware: Over 1.4 million members in 6 different countries available to answer all your high-tech questions. Sign up now! Its free!
Word :    Username :           
 

I have had a single Asus EN8800GTX for wile. Just picked up a used one on ebay so I set it up in SLI.

My issue is with the power supply. My power supply only has 2 PCI-E cords. Each EN8800GTX requires 2 for a total of 4 required.

what do I do?

Sponsored Links
Register or log in to remove.

Buy a new power supply? Seriously, it depends on how powerful is your power supply, because even if you use the Molex-to-PCIE adapter, it might not be powerful enough to support such a power consuming setup,

------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
Reply to emp

What's your total PSU wattage? Well what maker/model.

From there you can take standard 12V molex's and go to your local store and pick up 2 molex to 1 pci connector if you have to power available.



EDIT: ^ Beat me, he's pretty much right though, you probably don't have enough power to run the setup if your PSU doesn't have all the connections.


Message edited by bruce555 on 09-25-2008 at 10:57:56 PM
Reply to bruce555

hope you get yours running, SLI is really nice, must be had to be appreciated. With the right CPU the combo it is so good you will be very hesitant to upgrade for a long while.

------------------------------ Evga X58 3XSLI : i7 920 @ 4.2Ghz :GTX295+ x 2 :12GB XMS3 Dominator 8-8-8-21 1600 :XFi Fatal1ty:150GB WD VelociRaptor: 150GB Raptor: 4TB WD 32MB x4: Monsoon Vigor III: Lian Li P80 (black): BFG 1Kw PS: 37" Westinghouse 1080p 8ms :Vista64bit
Reply to warezme

avi8tir wrote :

this is the PS I have:

http://www.newegg.com/Product/Prod [...] 6817159058

700w should be enough, right?




Should be plenty all you need is some adapters then.

------------------------------ Evga X58 3XSLI : i7 920 @ 4.2Ghz :GTX295+ x 2 :12GB XMS3 Dominator 8-8-8-21 1600 :XFi Fatal1ty:150GB WD VelociRaptor: 150GB Raptor: 4TB WD 32MB x4: Monsoon Vigor III: Lian Li P80 (black): BFG 1Kw PS: 37" Westinghouse 1080p 8ms :Vista64bit
Reply to warezme

Barely cutting it with "supposedly" 41A on the 12V rails. Coolmax is not a reliable brand to be honest, I suppose you could try if you want with some adapters, but I wouldn't use it if it was my PC.

------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
Reply to emp

I run 2 overclocked 8800gtx's off of a 700watt thermaltake toughpower, I run just fine and im overclocked to ultra speeds.

------------------------------ "Since the dawn of time, man has dreamed of blotting out the Sun." - J. Montgomery Burns
Reply to hypocrisyforever

hypocrisyforever wrote :

I run 2 overclocked 8800gtx's off of a 700watt thermaltake toughpower, I run just fine and im overclocked to ultra speeds.

 

You are aware that first of all, thermaltake is leaps and bounds above Coolmax in terms of quality, right? Plus their rail ratings are pretty accurate, which is more than I can say about lower quality PSUs. I've seen cheap 650W PSUs rated for 40A get fried when put under a 20-25A test.

 

I am not saying not to use it, I am saying that *I* personally wouldn't use it and if you do decide to use it, then you should investigate the quality of that particular model before making a move.

 

EDIT: Done the research for you, here's a jonnyguru review about your particular PSU. (In case you didn't know, jonnyguru reviews are extremely detailed, respected, and accurate as far as PSUs go)

 

http://www.jonnyguru.com/modules.p [...] ry&reid=68


Message edited by emp on 09-25-2008 at 11:27:46 PM
------------------------------ Anxiously awaiting the Hydra 100 and the Hydra Engine...
www.lucidlogix.com
Reply to emp

ok, got it set up with my current PS. Will consider a new one if I have any issues.

I have turned SLI on in the nVidia control panel, but how do I know if SLI id working?

Reply to avi8tir

download gpuz and it should say 2 gpu enabled. or boot up a game and ull see a difference in performance.

------------------------------ 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
Reply to invisik

ok, all is working now. I ran gpuz and it looks like the used one I bought on Ebay has been overclocked. GPU Clock is 576 Mhz on my old one and the one from Ebay is 612 Mhz.

What should I do about this? do they both have to be at the same clock speed?

Reply to avi8tir

No, just put the faster card into the PCIe 1 slot.

------------------------------ [:mousemonkey:1] http://img29.imageshack.us/img29/5041/vr2009champ.jpg
Reply to mousemonkey
Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Settiing up 8800GTX in SLI - need help!
Go to:

There are 455 identified and unidentified users. To see the list of identified users, Click here.

Please mind

You are about to answer a thread that has been inactive for more than 6 months.
If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.

Add a reply Cancel
Sponsored links
  • Ask the community now
  • Publish
Ad
They won a badge
Join us in greeting them