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Is 600w enough for 2 graphics cards radoen 5450, 4670

Last response: in Graphics & Displays
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March 13, 2012 8:24:27 PM

Hello, i recently purchased a second graphics card for my pc for a second display. however when i installed it my pc wont even boot up, no post screen, but if i remove it it will boot up just fine. i have read some forums were they suggest that this might be caused by a defective graphics card or it might be insufficient power supply.
a b U Graphics card
March 13, 2012 8:38:32 PM

We are going to need your full system specs (makes and models) of everything including PSU.
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March 13, 2012 9:01:30 PM

I have a gigabyte motherboard ga-m61pme-s2p. AMD x2 Cpu. 2 kingston 2gb hyperx. amd radeon 4670. PSU 600W brand? it says apevia on the psu thats all i know. my real question is it not enough power to run both or is it a defective card. and if i dont have enough power what size should i buy
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a b U Graphics card
March 13, 2012 9:06:41 PM

Any PSU with Apevia on the label is trash. Knowing that, it is hard to speculate if you have a defective graphics card or if your generously rated PSU is hitting its limit.

I have another question for you. What is your first graphics card if the 4670 is your second?
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March 13, 2012 9:17:24 PM

no i already have the 4670 im installing a second graphics cards which is a radeon 5450
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a b U Graphics card
March 13, 2012 9:23:45 PM

Both the HD5450 and the HD4670 can do dual monitors on their own. You only need one or the other. You cannot crossfire them, they do not have that feature this low in the product line. Your motherboard also only has 1 PCI-E slot, which leads me to the question: where are you plugging in the 2nd card?!
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March 13, 2012 9:33:32 PM

the 4670 is pluged into the pci-express 16 lane. the 5450 is plugged into the pci-express 1 lane. that is the default pci slot for the 5450 by the way. i know that is possible i dont want to do that this way i prefer the two completely separate graphics cards. i would like to know what is the minuim power supply size/brand and recomended size/brand
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March 13, 2012 9:35:33 PM

ps 4670 does alow crossfire just for your information, it is not my intetion
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a b U Graphics card
March 13, 2012 9:46:55 PM

This PSU is more than enough for your setup. Its $30 after coupon and rebate - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Not every version of the HD4670 is crossfire capable, none of the ones available for sale, now, have it that I see. It looks like the original ones did have crossfire.

Also, I guess your HD5450 is one of the special PCI-E 1x editions. That should work just fine. If you are able to use each card, individually, without problems, then I bet your PSU is at fault here.
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a b U Graphics card
March 13, 2012 9:48:16 PM

Yes you can crossfire with the 4670 but the second card needs to be a 46xx series, as you have it not there is no possible way to crossfire them, sorry. You will want to return the second card. I would suggest upgrading to a better card such as the 6870 which is more powerful than two 4670's combined, that can also run dual screens.

Your current setup can run on even 430w of power.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
But if you upgrade to the 6870 (best option) then you should stay with the new 500w model.
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March 13, 2012 9:51:13 PM

What I would do if i were you is try the new card in by itself just to make sure it isn't a bad card.

For PSU suggestions, I would agree that PSU probably is not adequate. Your going to want to spend between like $60-100 on a good brand PSU that sli/crossfire ready good brand names are ones like Thermaltake, Antec, Corsair, OCZ

hers a decently priced suggestion


http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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March 13, 2012 9:51:47 PM

thank you i know how to fix it good information just what i was looking for. andrewcarr i know that and am not tring to crossfire
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March 13, 2012 9:53:27 PM

Best answer selected by WalterDurin.
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