Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Powering 8800 GT in SLI
Ask the community Add a reply
Word :    Username :           
 
Veralix   11-19-2007 at 08:52:04 PM

Hello,

I'm just a tad new to the 'build it yourself PC' scene, and I'm a bit confused as to how to power my dual 8800 GTs.

EVGA's website recommends 22Amps on the +12 volt rail, or 24 in sli mode. Is that total, or each card in SLI mode?

Also, how do rails work? I can't find almost any PSU that has more than 20A's in any single +12V rail, how am I going to power both cards without dropping a lot of money.

Add a reply
Sponsored Links
Register or log in to remove.
lostandwandering   11-19-2007 at 09:05:26 PM
- 0 +

The amps is for the whole system, not just the cards. They are looking for the 24amps on the combined +12v rails. Usually there is a sticker on the PSU that lists watts and amps to each rail. If you find the watts supplied to the +12v rail, divide that by 12 to get your amp rating. What PSUs are you looking at?

------------------------------ LAPTOP: Sager NP5760|T7200|2gb DDR2-667| 100gb 7200rpm HDD| 512mb 7950GTX|17'' WUXGA

Desktop: Core2 E7200 | Corsair 2gb DDR2-800 | Gigabyte EP35-DS3L | 250gb Seagate Barracuda | MSI GTX260 (192 SP) | Corsair VX550 | Antec 300 case
Reply to lostandwandering
Veralix   11-19-2007 at 09:25:23 PM
- 0 +

http://www.newegg.com/Product/Prod [...] ower%2b600

Is the PSU I was looking at, and says it has 18 Amps on 2 +12V rails.

Reply to Veralix
kpo6969   11-19-2007 at 09:31:02 PM
- 0 +

Cooler Master eXtreme Power RP-600-PCAR/PCAP NG

http://forums.guru3d.com/showthread.php?t=205763

I'd look some more, just my opinion.

------------------------------ P35-DS3L Rev 2 bios F9C l E8400 @ 3.6Ghz @ 1.232v l OCZ Vendetta 2 /LGA775 Bolt-Thru l 4GB G.Skill 8800PI@1000mhz 4:5 @ 1.87v l WD3200AAKS 320GB l Evga 8800GTS 512 l X-Fi Xtreme Music l Corsair HX520 l Antec Sonata III 500 l Vista32 SP2 l Win7 X64 7600
 Reply to kpo6969
Delluser1   11-19-2007 at 09:43:08 PM
- 0 +

jonnyguru did a review on that and it turned out to be a 500 watt psu.
As long as you dont have a dozen drives and watercooling this would work ;
http://www.zipzoomfly.com/jsp/Prod [...] e=10006757

Message quoted 1 times
------------------------------ q9650 @ 4.050 | Asus Rampage Formula | 2x2 & 2x1 Corsair Dominators | WD Black 640 x2
EVGA GTX260 Core216 @ 686/1479/1103 | Antec TPN 750

 

Reply to Delluser1

itotallybelieveyou   11-19-2007 at 09:48:40 PM
- 0 +

I wouldn't do anything with a decent brand and 550-600W. I don't skimp on power suppies either should you

Message quoted 1 times
------------------------------ It's a theater of love stories.
 Reply to itotallybelieveyou
Veralix   11-19-2007 at 09:55:22 PM
- 0 +

Delluser1 wrote :

jonnyguru did a review on that and it turned out to be a 500 watt psu.
As long as you dont have a dozen drives and watercooling this would work ;
http://www.zipzoomfly.com/jsp/Prod [...] e=10006757




That PSU says it only has one 6 pin PCI-E connection. I'd need 2.

Message quoted 1 times
Reply to Veralix
Veralix   11-19-2007 at 09:58:01 PM
- 0 +

itotallybelieveyou wrote :

I wouldn't do anything with a decent brand and 550-600W. I don't skimp on power suppies either should you



But I'm looking to purchase a powersupply I need for my system, not one with oodles of power that rapes in the power.

Reply to Veralix
Delluser1   11-19-2007 at 10:13:15 PM
- 0 +

Veralix wrote :

That PSU says it only has one 6 pin PCI-E connection. I'd need 2.



It also has a 6+2 8pin PCI-E connector, this is clearer
http://www.corsairmicro.com/products/vx.aspx

------------------------------ q9650 @ 4.050 | Asus Rampage Formula | 2x2 & 2x1 Corsair Dominators | WD Black 640 x2
EVGA GTX260 Core216 @ 686/1479/1103 | Antec TPN 750

 

Reply to Delluser1

Spitfire7   12-02-2007 at 03:59:07 AM
- 0 +

I would say get this one. I have this one and am very satisfied and impressed. Good price, great company, plenty of power to cover you for the next 5 years of upgrades, and plenty of rails and options and I bet you will never run out.

http://www.newegg.com/Product/Prod [...] 700w%2bOCZ


Message edited by Spitfire7 on 12-02-2007 at 03:59:32 AM
Reply to Spitfire7
Ask the community Add a reply
Tom's Hardware > Forum > Graphic & Displays > Graphics Cards > Powering 8800 GT in SLI
Go to:

There are 1325 identified and unidentified users. To see the list of identified users, Click here.

Forum map
Bestofmedia Forum ©
2000-2009 Bestofmedia Group
Page generated in 0.357 seconds
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
Related Topics
See all relatives topics
They won a badge
Join us in greeting them