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Simple Question: Can Underpowered PSU Kills a GPU?

post #1 of 11
Thread Starter 
Hi, I think i've been running on an PSU with insufficient wattage.

Is it possible that an underpowered PSU kills the video card? I feel like it happened to me once (to my GeForce 6800Ultra that ran with Pentium 4 and 6 Harddisks but 500W of power)

Thanks sniper.gif
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post #2 of 11
the simple answer is YES
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post #3 of 11
The answer is yes it can.
post #4 of 11
Yes, Underpowered PSU means the thing will run hot and be more likely to fail, surging and cooking some of the nice components that it is plugged into.
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post #5 of 11
Yes.
post #6 of 11
I never quite understood why this causes any issues to the GPU.

After all, why do we have things like OCP and OVP?
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post #7 of 11
Under powered PSUs usually don't have many safety features, so if they are pushed too hard they will just take it. Good, right? No. When that happens, the PSU will most likely have a failure of something critical to regulating power, and can give overdoses (or shorts bursts) of voltage to everything. It' kind of like a Brown-out, you know, when all the lights start flickering? That's what happens to you components.
    
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post #8 of 11
A good PSU will shut down over and over again indicating something is wrong.

The bad ones will work and work and work with excessive ripple and out-of-spec voltage until something pops/explodes/catches fire.
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post #9 of 11
The answer is no.

Or kinda.



It's a lot more complicated than all that, and anyone who tries to boil it down to just yes/no shouldn't be giving out advice.
post #10 of 11
Quote:
Originally Posted by snelan;13866832 
Under powered PSUs usually don't have many safety features, so if they are pushed too hard they will just take it. Good, right? No. When that happens, the PSU will most likely have a failure of something critical to regulating power, and can give overdoses (or shorts bursts) of voltage to everything. It' kind of like a Brown-out, you know, when all the lights start flickering? That's what happens to you components.

Underpowered doesn't mean low quality. I mean you could try to run a pair of GTX480s on an Antec SG-650, which is underpowered for that job, but the Antec will just shut down safely without harming anything.

On the other hand, you could run a single GTX480 on a Linkworld 750W and the Linkworld would probably explode and fry the system.
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