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  #1  
Old 01-08-2009
janbak janbak is offline
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Default PSU & VGA

Until now I was unable to know the minimum amp requirements on the +12v rail of the psu for the nVidia GTX 260 GPU, could you help me to find it?

Do you yhink that the LC Power Silent Giant v2.3 600W
Green Power (Ampere +12V +12V1: 17A / +12V2: 18A) is able to support a PC equipped with an nVidia GTX 260?

If the answer to the previous question is NO ... could you suggest some alternatives with a good price/quality ratio?

My new PC has both a LC Power Silent Giant v2.3 600W Green Power and a nVidia GTX 260 GPU ... but I've a crazy problem ... randomly when I'm playing the display freezes, the audio loops ... and my PC is totally blocked ... sometimes a message error appear saying that the nv4_disp driver doesn't work or is blocked in an infinite loop ... do you think that tha cause of this issue could be the PSU?

Thank you very much
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Old 01-08-2009
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MrWicked1968 MrWicked1968 is offline
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I'm no expert, but if that's a 600w PSU, I'll eat my shirt.

3.3v 24a, 5v 24a and 17 and 18a on 121 and 2 respectively.

I'm pretty sure it's at least part of your problem

btw, nvidia recommends a 500w PSU with 36a on the 12v rail for the GTX260 core 216. The video card doesn't need all of that, it's just a recommendation.

what's your location? it helps to know where you're at and what resources are available to you.
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Last edited by MrWicked1968; 01-08-2009 at 05:44 AM.
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Old 01-08-2009
janbak janbak is offline
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Quote:
Originally Posted by MrWicked1968 View Post
what's your location? it helps to know where you're at and what resources are available to you.
My location is ... Italy

Thank you very much
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Old 01-08-2009
janbak janbak is offline
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Could anyone else give me his advice?

Thank you very much
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Old 01-08-2009
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Your LC Power is definitely false labeling. It might be a 400W Huntkey, or 350W or so.
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Old 01-08-2009
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try some decent unit.
corsair vx450 might be enough, and I think it is the cheapest and the quietest (concidering the price) solution out there.
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Old 01-08-2009
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Quote:
Originally Posted by MrWicked1968 View Post
btw, nvidia recommends a 500w PSU with 36a on the 12v rail for the GTX260 core 216.
17+18=35, which isn't enough even if it is additive (which it isn't).
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Old 01-09-2009
janbak janbak is offline
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What kind of problem could I experience with my VGA if the PSU doesn't satisfy the minimum requirements of 12V current rating of 36A?

Thank you
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Old 01-09-2009
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Instability or crashes due to power sags, or a better case scenario would be the video card throttling (GTX 260 goes down to as low as 300MHz). Most extreme case would be no picture.
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Old 01-09-2009
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IMHO, the effect on the peripherals which getting a regulated power input won't be fatal initially -VGA card, MoBo, CPU, but i must say HDDs would be among the first victim out of a bad, underpowered PSU.
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