[Jade_Monkey]

On BFG's website it says if you want to SLI 2 7900GTX's you need a minimum 500 watt PSU with a 12v+ rating of 34 amps or higher. My question is my PSU is a 500 watt with 33 amps on the 12v+ line, will it be safe to SLI 2 7900GTX's ? The only other thing hooked up to the 12v line is a floppy, 1 hdd, 1 dvd rom, and 2 fans.

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[oOgA]

u got to see wat brand ur psu is..,..if it is those ulu ulu brand...500W stated on the label is definitely overrated...it wldnt be enuff..

[Jade_Monkey]

It is a Seasonic S12 500 Watt. Here is a link:

http://www.seasonic.com/product/pc_atx.jsp

it's at the bottom. But the box says it should be up to 80% efficient which would be 400 Watts. After reading that I am thinking of upgrading the PSU, which sucks because I just bought this one a few days ago.

[Mohawks]

if you are going to spend US$1000 on 2x 7900GTX SLI, you better invest a little more on a good PSU rated at least 550W... confirm at least US$100+

in the first place, why would you need 2x 7900GTX SLI???

[Jade_Monkey]

n the first place, why would you need 2x 7900GTX SLI???

Simply because I can. That and they can run FEAR maxed out at 1680*1200 at an avg of 69 FPS. Although you do post a good question, i'll check into other cards just to see if I can get similar performance with less power and money.

[oOgA]

Mohawks alreadi said it and i tink anyone will agree..., if u are gonna get high quality products...u need a a solid foundation.. i.e the psu and cpu in this case imo

[jsy982002]

the PSU may also save you the trouble of ruining your whole rig just because the power fails now and then....ouch!

[peacewayne]

and PSU can last u for a veri veri veri long time among all the PC parts. so might as well invest in a big 1, and use long long

[Jade_Monkey]

As much as I would like to get a new PSU, the one I have is a new one. I don't want to go buy another one just days after buying this one. I have decided to just go with 2 7900GT's which my current PSU will have ample room to power. I read some reviews and will he happy with how they will run FEAR and other games like it.

[syscev]

All this talk about AMP and volts made me worried becuase my new Acbel PSU 12 volt AMP rating does not fit the requirement set by nvidia.

( don't really understand this AMPs, 12 volts rails stuff. Always thought wattage was the main considered factor)

I am asking Acbel customer service the question directly. Hope they reply to me.

Hi Acbel CS,

I bought your LCD 550 watt PSU quite recently (have not used it yet though), I am also planning buy the undermentioned GPU. However I am worried about the following requirement mentioned below for the Nvidia 7950x2 "(with 12V current rating of 27A)."

1) Is your PSU able to support its power requirements ?
2) How do I tell from the LCD screen if facing problems ?
a) Should base it solely on the watts used ?

I kindly seek your advice on the issues.

Addtiontal info: I will importing devices from my old rig. The new rig would have, 1 dvd-writer, x4 HDDs, 1 sould card, planning to be used with an MSI P965 motherboard, with an Intel E6700.

I hope your PSU is able to cater the power requirements of all these devices together.

http://www.msi.com.tw/program/produc...il.php?UID=752

<qoute>
System Requirements:

To install the VGA card, your computer system needs to meet the following requirements:

* A compatible PCI Express motherboard and SBIOS. Please visit www.nvidia.com/GX2 for a list of compatible motherboards and SBIOS.
* A 6-pin PCI Express supplementary power connector.
* A minimum recommended 400W system power supply (with 12V current rating of 27A).

Note: The Geforce 7950 GX2 graphics card may require an updated System BIOS(SBIOS) for certain motherboards in order to boot and operate reliably in your system.Please contact your motherboard manufacturer for an updated SBIOS or visit www.nvidia.com/GX2 for a list of compatible motherboards and SBIOS.
</quote>

[elu]

http://www.slizone.com/object/slizon..._powersupplies

[syscev]

Originally Posted by elu

http://www.slizone.com/object/slizon..._powersupplies

Thanks.

I other words I got tricked.. Damn Acbel sales guy at the Corbell show. Him ->

They SLI certified themselves.

[weixiang]

Originally Posted by syscev

Thanks.



They SLI certified themselves.

corbell certified..!

[Jade_Monkey]

I am going to answer a few questions here. First, I think amps on the 12v rails are more important than wattage. Furthermore the amps would of been available when you bought it, and they can be SLI certified without being able to run the 7950 GX2's. I am not trying to be mean, but just to point out facts. On a more jolly note, I got my 7900GT's in SLI right now and have run FEAR. I used to get 40FPS average when at Medium and AA at 2X and AF at 4X. Now I get 80FPS average with absolutley everything maxed out at 1024*768 (same as before). I will run further tests later.