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Old 05-07-2010, 09:08 AM   #1
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Default will my corsair400w power a HD5870 ?

Hi guys,

I've been buying parts for a new computer over the last couple of months, and left the graphics card till last (I wanted a working computer but didn't have the money for the whole lot) and now my computers up and running, albeit with an old graphics card, and i've run into around 90 it's time to look at graphics cards.

The main purpose would be to play games such as MW2 or Just Cause 2 at 1980x1080 at 'hopefully' moderate - max settings. I am looking for the best graphics card under 100 and saw a 'XFX ATI Radeon HD 4870 512MB GDDR5 PCI-Express Graphics Card' for 90 and wondered if my computer could support it (mainly if the PSU could handle it).

My current AM3 setup is:

Enermax Pandora case,
MSI 770-C45 mainboard
AMD athlon x2 250 3ghz (with stock heatsink/fan)
Corsair cx400w psu (30A on a single 12v rail)
2x2GB G.Skill Ripjaw DDR3 1,600 Mhz (4GB total)
Nvidia Geforce 8600GT (this is what I want to replace)
Windows 7 - 64bit

The cards I was looking at originaly were GT 240s and HD 4670s and HD 5850s but closer to 100 I can get either a GT 250 or a HD 5870. The HD 5870 aparently requires a minumum of 450w with 2 6pin PCIe plugs.

My question is could my system support such a card (will my Corsair 400w be able to run it). I would have to use a 4pin molex to 6pin PCIe adapter I think because I have only 1 on my PSU. Would it be a case of my system would run it but barely or would it keep freezing or going black?

Any input would be aprecciated, especially if anyone has a similer setup themselves. I would like to think the minumum 450w value on XFXs website is exagerated for the purpose of covering rubbish/unbranded PSUs and that my Corsair one should be able to do the job.

If not, would you suggest something a little less powerfull like the GT250 or HD 5850 perhaps? Also if I had to use the 4pin molex to 6pin PCIe adapter, would I have to use 2 instead of 1 and 1 actual PCIe lead fromt he PSU to make the power more even between the 2 plugs (sorry if that question is nooby, im not overly sure on this topic)

Thanks again and I look forward to hearing from you
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Old 05-07-2010, 03:26 PM   #2
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Default Re: will my corsair400w power a HD5870 ?

A HD 57xx card should be okay. As far as the ones you listed, I say no. You are pushing it way too far.

Btw, a 5770 will run the games you listed at or near max. No need for any more power.
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Old 05-07-2010, 05:58 PM   #3
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Default Re: will my corsair400w power a HD5870 ?

Thanks for the info, unfortunately the 57xx cards are all above 100, the 5770 being around 130 (sad face). Would the HD 5850, which only requires 1 6pin, be supported as well by the PSU and if so, is it a suitable replacement.

The only other alternative would be to go with GTS 250 or the 56xx series I think. Any input would be appreciated, cheers.
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Old 05-07-2010, 10:58 PM   #4
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Default Re: will my corsair400w power a HD5870 ?

Quote:
Originally Posted by Capiech View Post
Thanks for the info, unfortunately the 57xx cards are all above 100, the 5770 being around 130 (sad face). Would the HD 5850, which only requires 1 6pin, be supported as well by the PSU and if so, is it a suitable replacement.

The only other alternative would be to go with GTS 250 or the 56xx series I think. Any input would be appreciated, cheers.
The 5770 is a cheaper card than the 5850, which is cheaper than the 5870. You have your numbers all screwy O_o


The GTS250 is a long shot from the 5850 and 5870, I would recommend just getting a 5770 and then another one later on if you need more power and have a better PSU. Two 5770's will outrun a 5850 in most cases anyhow.
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Old 05-08-2010, 08:32 AM   #5
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Default Re: will my corsair400w power a HD5870 ?

Oh Lol I just realised: Iv'e been writing the wrong cards. When I said 5870 or 5850 I meant 4870 and 4850

oops that might clear up a few things...
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Old 05-08-2010, 09:42 AM   #6
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Default Re: will my corsair400w power a HD5870 ?

Look around on eBay and you'll find HD4890's for very near to 100 and for that your getting a card that will soak a HD5770 all day every day. In fact it can get cloudy around the HD5850 too.

The downside, to a few, will be the lack of DX11 on the HD4870/HD4890's but I think 'meh' when your engrossed in your favourite game at a smooth high FPS.
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