Can I run 9800 GTX SLI with this PSU?

[zephurus]

With this PSU: http://www.bfgtech.com/bfgr650wpsu.aspx

my full specs are: AMD 6400+ n750 Tpower, 9800GTX 1066 Corsair 4096MB RAM. three 80 mm fans (including the rear one) and one 120 mm fan, 1 hard drive and one DVD-RW drive.

 

[geofelt]

Your link does not work.

No, that psu will not work.
A 9800GTX requires 24a on the 12v rail, and two 6 pin pcie connectors.
Multiply that by two for sli, and you are nowhere close.

Here is a good unit that will:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703009

 

[br3nd064]

No, it won't be enough. The one in the link that geofelt posted will.

 

[zephurus]

What about this one?

http://www.bfgtech.com/bfgr800wpsule.aspx

 

[invisik]

the 1st psu u posted will work perfectly fine. 800w would be overkill.

 

[br3nd064]

I'd get the PC Power & Cooling one over that.

 

[cow_moo]

no it won't I have a 650w like that and it can't handle it u have to get 700-750 MIN

 

[t85us]

goddamn, my microwave owen needs 800W )

 

[shine]

Nope

 

[geofelt]

What about this one?

http://www.bfgtech.com/bfgr800wpsule.aspx

The specs on that one says certified for 8800GTS and below, not 9800GTX.
If it was good enough for 80+ efficience, it would say so.
A PSU is not the place to cut corners.

 

[doomsdaydave11]

In reality, a 550-watt power supply should be plenty, but that unit you have doesn't have enough amperage on the 12v rail. Bummer dude.

 

[Shadow703793]

The specs on that one says certified for 8800GTS and below, not 9800GTX.
If it was good enough for 80+ efficience, it would say so.
A PSU is not the place to cut corners.

+1. I recommend a PC Power & Cooling 750 or a Corsair 750TX.

 

[invisik]

no it won't I have a 650w like that and it can't handle it u have to get 700-750 MIN

are you kidding that psu has enough watt and amps on the rails to run 2 9800gtx. your psu probably was faulty or something. Im running 2 gtx260 in sli with a quad core with a 500w there is no way 650w wouldnt work.

 

[n00bcpu]

I am a n00b builder. I am trying to build a new CPPU with quad core, 790i Ultra mobo and tri-sli 9800GTX wat power source should i buy can i use this one?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703009

 

[geofelt]

I am a n00b builder. I am trying to build a new CPPU with quad core, 790i Ultra mobo and tri-sli 9800GTX wat power source should i buy can i use this one?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817703009

The PSU is a very god one, and would work, BUT I don't think it is a good idea to try to use tri-sli unless you already have the cards. It would be much better to get a single good card like the GTX295.

 

[JohnnyLucky]

A single 9800 GT video card uses 132 watts and 11 amps at full load.

Two 9800 GT video cards in SLI mode use 258 watts and 22 amps at full load.

Tom's Hardware recently published an article about video cards and actual power requirements. There is a link to the article on the home page. Most people asking about power supply requirements usually overestimate power requirements. It happens all the time at this forum.

doomsdaydave11 posted the correct answer. A high quality, efficient 550 watt power supply with sufficient amperage can handle two 9800GTX video cards in SLI mode.

invisik posted that he is running 2 gtx260 in sli with a quad core with a 500 watt power supply. I'll bet he is using a high quality psu.

Corsair, PC Power & Cooling, and Seasonic all have a solid reputation for high quality psu's that are very stable and reliable. They consistently earn high marks in technical reviews and comparisons. They are the brands most often recommended by veteran posters at this forum.

For example, the Corsair 550VX 550 watt power supply has a 12 volt rail rated at 41 amps:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139004

There are a lot of cheap low quality psu's with on the market. They are not worth the risk.