PSU + 12V Rail + 7900GT

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pramz

n00b
Joined
Nov 28, 2004
Messages
2
Hello everyone,

I'm not sure whether this should be in Power Supplies or the video card forum but here it goes:

I have an AMD 3200+ system with 1Gb of Ram and a BFG 7900GTOC video card. The card was having issues (corrupted images, protruding sticks from models in games) , so I RMA'd it and got it replaced. Now the card is consistently having corrupt screens and locking up.

When i spoke to BFG tech support, they asked me to install and run PC Wizard 2007 to see the voltage on my 12V rail. PC Wizard reports it at 11.39V, where as in the BIOS it is reported at 12.1 volts.

I picked up a RaidMax Volcano 630W PSU and the 12V rail voltage has not changed. The tech support person told me that the 12V rail should not fluctuate below 11.9V or above 12.1V.

Any suggestions on what should be done? I can always exchange it from Frys for another one.
 
The ATX spec is 11.4 to 12.6v so tech support person is incorrect there.

Software isn't going to be very accurate (BIOS either) so stike two on support guy.

The Raidmax Volcano is if you are lucky a lower end Topower. Personally I would usea different PSU. Assuming the issue is the PSU.
 
Well since i just bought the PSU yesterday, I'll drop by at Frys and return it. I went and checked the ATX specs and you are right, the variance is +/- 5%.

I ended up calling BFG again and the tech I spoke with said that the other tech should _not_ have told me that. Assuming that the BIOS reading is more accurate the output voltage is within spec and should be fine. I'll check out the recommended PSU thread and pick up a better one than what I have now.

In summary I should do more research before I depend on tech support from the manufacturer. She could very have been trying to put the blame on me and avoid giving me another RMA. (This card was a replacement for another card).
 
pramz said:
Hello everyone,

I'm not sure whether this should be in Power Supplies or the video card forum but here it goes:

I have an AMD 3200+ system with 1Gb of Ram and a BFG 7900GTOC video card. The card was having issues (corrupted images, protruding sticks from models in games) , so I RMA'd it and got it replaced. Now the card is consistently having corrupt screens and locking up.
Click to expand...

That may not very well be due to the card itself. A BFG 7900GT OC, according to BFG themselves, should have at least 20 amps available on that 12 volt rail. Given Raidmax's rather unfavorable reputation, I wouldn't doubt if their so-called 630 watt power supply were unable to provide 20 clean amps from the combined 12 volt rails.

Any suggestions on what should be done? I can always exchange it from Frys for another one.
Click to expand...

Get a high quality power supply. Raidmax isn't exactly in most folks' favorite lists here.

Something like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371002

would have done much, much better, and only for a few dollars more.
 
Unabomber said:
That may not very well be due to the card itself. A BFG 7900GT OC, according to BFG themselves, should have at least 20 amps available on that 12 volt rail. Given Raidmax's rather unfavorable reputation, I wouldn't doubt if their so-called 630 watt power supply were unable to provide 20 clean amps from the combined 12 volt rails.



Get a high quality power supply. Raidmax isn't exactly in most folks' favorite lists here.

Something like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371002

would have done much, much better, and only for a few dollars more.
Click to expand...

Niether is Antec...lol
 
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