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Power and 5870

Last response: in Graphics & Displays
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April 15, 2010 3:33:40 PM

i got an 5870. i got one 400w and another 400w psu. One psu give power to hdd, modercard, processor (one hdd and a dual-core 3.0Ghz). The other one has 3 power things and the card requires 4 is it ok to connect same card to 2 different PSUs? Btw i dont want my card to blow up!

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a c 140 U Graphics card
April 15, 2010 3:36:28 PM

3 power things? can you be more specific? Is the 2nd 400W a dedicated powersupply for video cards? Or are these 2 normal PSU's? DO you currently have them both hooked up and running a graphics card?

My opinion is, if you are going to spend $400 USD on a video card, get a real PSU to run it. For $80 you can get something that will do what you need and be safe about it. It sounds like you want to use a cheaped out power solution to run a high end card. Not a good idea.
April 15, 2010 3:39:15 PM

jay2tall said:
3 power things? can you be more specific? Is the 2nd 400W a dedicated powersupply for video cards? Or are these 2 normal PSU's? DO you currently have them both hooked up and running?

My opinion is, if you are going to spend $400 USD on a video card, get a real PSU to run it. For $80 you can get something that will fit the bill.


3x 4pins?

These are one corsair and one other old psu, normal PSUs. They works and i currently use one psu. In a week im going to but a new psu.
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a c 140 U Graphics card
April 15, 2010 3:50:12 PM

The 400W Corsair is a nice PSU but won't handle the 5870. I am assuming you mean 3x 4pin molex connectors. My assumption is that like PSU won't be able to handle the current draw. I wouldn't chance it. The worst thing you can do is not have enough power. It puts a hard load on the components.
a c 189 U Graphics card
April 15, 2010 4:26:05 PM

Yup, u will better with a single powerful PSU, u can buy an expensive GPU but u can't afford a "cheap" high quality PSU?
Don't take a risk, u have a great GPU on your case... :D 
April 15, 2010 4:39:20 PM

wa1 said:
Yup, u will better with a single powerful PSU, u can buy an expensive GPU but u can't afford a "cheap" high quality PSU?
Don't take a risk, u have a great GPU on your case... :D 


i got 2 PSUs and im going to buy like a 850w next week, the question was can i use 2 psu to same graphic cards or is that a stupid thing to do (different voltage and ***?) - if i dont want my 5870 blown up?
a c 140 U Graphics card
April 15, 2010 5:53:23 PM

850W is total overkill. The requirement is 600W and 40A (on 12V rails) You can calculate this by getting the 12V wattage. For example if it says max 480w on 12V it would be 480/12v= 40A

So you need a 600W PSU with at least 480 watts combines on 12v rails.
!