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PSU for an AMD 7870 and my current rig? - Page 2

post #11 of 23
Quote:
Originally Posted by xutnubu View Post

I already sent the email to my brother. If it's cheap we'll buy that one. Thanks.
What's the disadvantage of dual +12V rails vs singles?

600W is quite overkill for what you want. You could easily get by with a much higher quality 450W PSU, instead of getting a "decent" quality 600W. Read this concerning multiple rails:
Quote:
Originally Posted by Phaedrus2129 
So final verdict? Single rail or multi rail? Well, with low-wattage units it doesn't matter. OCP on a single rail is useful up to about 40A or thereabouts, which is where most 550W power supplies fall. So with 550W and under power supplies, it's a moot point. However, with high wattage units, >45A on the +12V (650W and higher) picking a multi-rail unit will provide you with an extra layer of protection. It isn't essential, and it has no impact on the power supply's performance. However, it does provide an extra layer of safety in case you get a short circuit. And I would consider it a must for >1000W power supplies; [H] recently tested the single rail Corsair AX1200, but they had an accidental short circuit, and since the PSU's OCP is set for over 100A, the short overloaded and destroyed most of their testing equipment. So there is a danger with single rail units over 1000W.
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post #12 of 23
400W is enough, but get any 500W unit in that price range and you just cannot go wrong thumb.gif
post #13 of 23
Quote:
Originally Posted by iinversion View Post

Quote:
Originally Posted by xutnubu View Post

I already sent the email to my brother. If it's cheap we'll buy that one. Thanks.
What's the disadvantage of dual +12V rails vs singles?

600W is quite overkill for what you want. You could easily get by with a much higher quality 450W PSU, instead of getting a "decent" quality 600W. Read this concerning multiple rails:

If you looked at the psu I linked him, the 550w xfx unit is a solid quality unit from seasonic. you arent going to find "much higher quality" in that price range.
 
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post #14 of 23
Quote:
Originally Posted by Biorganic View Post

If you looked at the psu I linked him, the 550w xfx unit is a solid quality unit from seasonic. you arent going to find "much higher quality" in that price range.

I didn't look at it. The only one I looked at was the GS 600W by Corsair because that is what he seemed leaning towards buying. The XFX is a good PSU for the price. He should get that one for sure. thumb.gif


And, 550W is way more than enough. So no need to get the 650W XFX PSU. wink.gif
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post #15 of 23
Do you realize that your graphics only uses 110w in gaming at 1080p?

Seriously, you should be looking at 350-400w PSUs
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post #16 of 23
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post #17 of 23

How is that a favor? That's double what he needs.
post #18 of 23
Quote:
Originally Posted by bR0ken_pr0Jector View Post

How is that a favor? That's double what he needs.

It's a bit more yah? From his high mark of 70 its only 30 bucks. Buy a lil more, maybe a bit more psu than you need now so when upgrade you don't have to upgrade the psu too or whatever combination. 30 bucks, no beer for two weeks, done.
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post #19 of 23

I lol'd at this. If i was in the market I would jump on that deal, but saddly that is a bit much for our 7870 buyer...
 
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Xonar Dg Superlux HD 668B 
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post #20 of 23
It's ironic we're all batting for the same team at different power levels, lol.
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