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Advice/help for power supply

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September 11, 2012 12:20:30 AM

Hello,
I am looking for advice/support concerning the purchase of a power supply. I am not a total noob but have been out of the computer scene for several years. I recently purchased this for my gaming rig :
(was based on money limitations and not a fan of intel (personal issues with them))

m5a99x evo
amd phenom ii x4 965 3.4g
sapphire hd6850
8gig memory
western digital 1tb hdd

i am ordering another hd6850 to set up in crossfire. my mobo suggests a 1000w which i am currently researching. is there a clear winner on which to choose? any advice on this matter or build would be helpful.

thanks in advance (toms hardware has been a great help in catching up to speed with whats been going on since Ive been AWOL for the last 5 years)

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September 11, 2012 12:31:27 AM

Blue_Eagle_42 said:
Hello,
I am looking for advice/support concerning the purchase of a power supply. I am not a total noob but have been out of the computer scene for several years. I recently purchased this for my gaming rig :
(was based on money limitations and not a fan of intel (personal issues with them))

m5a99x evo
amd phenom ii x4 965 3.4g
sapphire hd6850
8gig memory
western digital 1tb hdd

i am ordering another hd6850 to set up in crossfire. my mobo suggests a 1000w which i am currently researching. is there a clear winner on which to choose? any advice on this matter or build would be helpful.

thanks in advance (toms hardware has been a great help in catching up to speed with whats been going on since Ive been AWOL for the last 5 years)


1000 watts is completely overkill for your current rig. Even at 500 watts is enough. Do you have a budget?
September 11, 2012 12:38:39 AM

no budget anymore. there was when I first ordered my parts. I have a 650 watt psu in my rig already (which is why i didnt buy another) however, the mobo suggests a 1000w power supply when running two gpus in crossfire. I am ordering the second hd6850 as soon as I get the power supply figured out. thanks for quick replies by the way :pt1cable: 
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September 11, 2012 12:39:10 AM

a nice old corsair cx500 can handle all those stuff and some extra more ^_^

but if your going for crossfire a 80plus bronze or silver at 600-700W is more than enough so you got some head room for efficiency.

since your on a budget how about those corsair TX600-700 V2 80plus bronze, should do the trick
September 11, 2012 12:46:32 AM

Blue_Eagle_42 said:
no budget anymore. there was when I first ordered my parts. I have a 650 watt psu in my rig already (which is why i didnt buy another) however, the mobo suggests a 1000w power supply when running two gpus in crossfire. I am ordering the second hd6850 as soon as I get the power supply figured out. thanks for quick replies by the way :pt1cable: 


A 650 watts power supply should be enough to power two HD 6850's in CrossfireX. I don't really think upgrading the power supply is needed.
a b ) Power supply
September 11, 2012 1:07:48 AM

Depends on make and model of psu, as to weather or not a 650 watt will handle the load. AMD website has a list of certified power supplies for AMD video cards, chech it out.
September 11, 2012 2:03:02 AM

thanks all for the comments! I intend to give the power supply I have to my dad so i am deff going to get another. I was just wondering if the number of 12v rails is important. It seems to me that having more than one rail is purely for saftey purposes? so that if one rail is maxed your system will shut down before it burns up. i am wondering if a psu with multiple rails will run each gpu on a seperate rail? i was only looking to get a 1000w just so i wouldnt have to upgrade that when upgrade time comes.....but it seems a smaller unit will do. I guess i am more concerned with how much amperage is provided on the 12v rail? ive bought corsair in the past and was pleased....anyone got a brand they trust the most? also the mobo suggests compliance with ATX 12V version 2.0 or higher.....is a PSU with just ATX 12v (not version 2.?) not gonna cut it?


!