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IS 650W enough for 2x6870's? - Page 3

post #21 of 57
You will be able to just fine, that setup draws maybe 550w.
 
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post #22 of 57
From HARDOCP:

Quote:
The Bottom Line

The Cooler Master GX 650W is a mediocre power supply for couple of years ago, and an outright failure today. The Build Quality of the unit is nothing to write home about (unless it is a warning), the topology is old and outdated, and the exterior is flash over substance. Coupled with this we have mediocre voltage, poor by today's standards efficiency, and out of specification DC Output Quality. One upping this poor showing is that fact that the unit was completely unable to complete our load tests at 100v AC input. That makes the GX 650W not just a failure by our standards, but rather a double failure and an ugly one at that. Making matters worse is the fact that this unit is priced at up to $100 in retail and $70 online.
Yikes. It even failed during their load testing.
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post #23 of 57
Quote:
Originally Posted by obsidian86 View Post
not even close to that he'll be lucky if it even breaks 400 watts gaming
I've had bad experience with CM psu so i tend to think those psu are -150 watts then what there really rated, but thats only IMO
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post #24 of 57
Don't worry you'll be fine
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post #25 of 57
Quote:
Originally Posted by Darksoul844 View Post
I've had bad experience with CM psu so i tend to think those psu are -150 watts then what there really rated, but thats only IMO
yeah they kinda iffy

crossfire 6870's actually draw just a bit more then a single gtx580

a good 650 watt will do fine even amd themselves reccomend an inflated figure of 600 watts for 2 6870's
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post #26 of 57
Thread Starter 
so I asked this in another thread but think i'll get more notice here.... but I noticed my PSU doesnt even have 4x6-pins. so I couldnt Crossfire unless I used 2xmolex-> 2x6pin. would that be ok or would it not be advisable?
     
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post #27 of 57
I have never encountered a problem with that (using molex to 6 pin) How long have you had that GX PSU? Because If Im reading reviews on the right one.. That thing is garbage.
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post #28 of 57
Thread Starter 
purchase date was 6/16/2011

How is XFX? they have a 650Wfor $60 (after rebate) HERE

or their semi modular 650 for $100 (after rebate) Here
     
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post #29 of 57
Quote:
Originally Posted by remnant View Post
so I asked this in another thread but think i'll get more notice here.... but I noticed my PSU doesnt even have 4x6-pins. so I couldnt Crossfire unless I used 2xmolex-> 2x6pin. would that be ok or would it not be advisable?
You're asking the wrong question.. read the thread again and among the endless spam you'll find some informed advice that says something along these lines: your PSU is trash, your PSU can hardly output 400W, your PSU cannot run a 6870 CFX setup safely and in a stable manner.
You don't need Molex to PCIe adapters, you need a new PSU.

edit:
XFX Core line is Seasonic SS-xxxAT internally, they're very good units and the 650W version is an excellent deal @ 60$, also comes with enough PCIe connectors for two 6870s.
Edited by Original Sin - 11/7/11 at 10:41am
post #30 of 57
Thread Starter 
So a 650W from a good company,
such as XFX or ... um how do you know if they are good or not? I know OCZ puts the "sustained power" so thats seems trustworthy?
should be able to run 2x6870 (no overclocking) just fine?
     
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