Is this psu enough for crossfire?

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itsdaywith

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Aug 27, 2014
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Hi all!
I recently purchased a thermaltake Berlin 630Watt psu max wattage is 700W but its stable at 80-86% so i wanna buy an asrock z77 extreme 4 (if i remember correctly this mobo can handle dual graphics card) and i wanna know do i need bigger psu for two MSI r9 270 Gaming edition gpu?
Rest of pc
(now:
i5 2500k
gigabyte hd6850
8gb kingmax 1333mhz RAM
1Tb 7200rpm 32mb HDD
asrock h61 m-ge
2 fan in the case)

later :
i5 2500k oc to 4.5-4.8Ghz
MSI r9 270 Gaming 2GB (2x)
Asrock z77 extreme 4
8gb RAM 1333mhz
7200 rpm HDD
CM Hyper 212 EVO

Thanks for your help ! i really appriciate it ^-^
 
Solution
jossrik
620W will handle almost any single card the only caveats are the beastly dual GPU cards, those tend to eat PSUs. I recommend the fastest single card you can buy. Then a couple years down the road add a second if performance is lagging, or buy a much newer card and go that route. Either way works.

I try to get my PSUs about 80% max at load. So if your system requires 600w you want something in the 675w range, give or take. Also, try and find a PSU that's rated as high as you can get, PSU is the one place you can't skimp, a good PSU will last you ten years or more, a couple of builds, maybe more. It's not about delivering energy, it's about delivering clean energy. The less ripple the parts have to contend with the longer they'll...
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jossrik

jossrik

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Recommended for 270s in crossfire is 620w, so you're cutting it close, though it should work. Personally, I had 2 7870s (same chip, well, one was an XT, so that one was a different chip, anyways), ran them on a 650w with no problems, everything OCed.
 
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Conor17777

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Aug 23, 2014
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You should be fine, you are cutting it a bit close, i would see about getting perhaps a 750w , when your spending as much as you are the jump of 100w is usually negligible to the final cost.

Ontop of that its healthier for your system and also reduces heat produced by the PSU.
 
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itsdaywith

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And how about a more powerful single card ? in here (hungary) everythings is much more expensive like a gtx 760 is 350-380 USD :/ so what gpu do u recommend ?

 
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jossrik

jossrik

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Sep 26, 2002
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620W will handle almost any single card the only caveats are the beastly dual GPU cards, those tend to eat PSUs. I recommend the fastest single card you can buy. Then a couple years down the road add a second if performance is lagging, or buy a much newer card and go that route. Either way works.

I try to get my PSUs about 80% max at load. So if your system requires 600w you want something in the 675w range, give or take. Also, try and find a PSU that's rated as high as you can get, PSU is the one place you can't skimp, a good PSU will last you ten years or more, a couple of builds, maybe more. It's not about delivering energy, it's about delivering clean energy. The less ripple the parts have to contend with the longer they'll last, in general, there's always good and bad luck when it comes to components.

https://community.newegg.com/eggxpert/computer_hardware/f/135081/t/45344.aspx?Redirected=true

http://www.realhardtechx.com/index_archivos/Page362.htm

These are general guides, but as it works, the better tiers are a higher quality in general, the wattage is for an average build, so if you have eleventy million HDDs, you might need a bigger PSU, Workstations tend to need more juice too, as do boards that are made for overclocking. But it's a good place to start, and it's where the know it alls go for their average information.
 
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