Sapphire 6850 Power Problem ?>

[barron14]

Hi,
Today I bought the Radeon 6850 1gb ddr5 model , and I have it installed into the pci x16 slot at the moment. I noticed once it was in the slot that I had no PCI power cable to go on top of the graphic card. So I got the adapter out of the graphic card box and connected it to the top of the graphic card. I noticed at the end of the adapter that it had a molex 3-pin connection and all I had coming out of my power supply was 4-pin molex connecters. I cant add pictures on this for some reason but I am wondering would that alright if I connected the 3 pin molex to the 4 pin ?

 

[barron14]

I have an un-named 500w psu but I beleive the 6850 uses a maximum of 180 watts so should that be alright to run the card ?

 

[barron14]

Wel I read the power supply on my pc and it says :

Dc output: +3.3v= 22a
+5v=25a
+12v=18a
+12v=16a
-12v=0.5a
+5VSB=2.5a

Is that not good enough for the 6850 ?

 

[barron14]

My PSU name is ATX-500

 

[barron14]

it's a roll of the dice. from your 12v rail it looks like a 450w PSU.[/quotemsg

Other people have been telling me that it should be fine. What is the worst thing possible that could happen? PSU stop working ?

 

[Deemo13]

it's a roll of the dice. from your 12v rail it looks like a 450w PSU.[/quotemsg

Other people have been telling me that it should be fine. What is the worst thing possible that could happen? PSU stop working ?

The worst possible thing that could happen is that the power supply could burst into sparks and die, and take some components, like your shiny new 6850, with it.

 

[barron14]

+1

more then likely it will just die a quick death but you (and we) don't know what safety circuits it has if any at all.

so what is the recommended amps for the 6850 if i were to buy a new power supply and also what are the minimum amps required?

 

[barron14]

it says exactly at the back of the PSU this:

Dc output:

[+3.3v= 22a ]
- Rated power= 130w max
[+5v=25a ]

[+12v1=18a ]
-- Rated power= 351w
[+12v2=16a ]

-12v=0.5a - Rated power= 6w

+5VSB=2.5a - Rated power= 12.5w

I would of thought 351w would be able to run the card with no problem?

 

[barron14]

Thanks for that info, so if I were to buy a new PSU what would be the minimum requirement of amps to run the 6850 would you say ?

 

[barron14]

30a on the 12v will do the job on a quality unit.

Alright thanks, thanks a million for your advice, your a great help!