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(noob) underpowered PSU issues ?

post #1 of 14
Thread Starter 
Hi guys,

i would know what happens when your PSU can't provide enough power to your system...

- Does the system shut down and restart ?
- Can it break any part of the computer ?

I'm asking this, because i bought a new graphic card, removing a 8800 GTS for a GTX 560 ti OC ; but since it didn't provided any improvement in the games i play, my cpu is the bottleneck.

So, now i plan to upgrade it to a new generation one, (from Athlon 64 X2 to Phenom II X4 955 or 965), but i may already be borderline in power consumption.

I have a 500W PSU (don't know if it's branded or generic), 3 years old, and would like to know...

Thanks
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post #2 of 14
When your PSU doesn't provide enough power it blows. Sometimes it can burn a little inside and rarely it can damage your components. Use a PSU calculator online if you want to be sure.
post #3 of 14
Never use an unbranded PSU. A good 500W will power that lot no problem. An unbranded one would be just silly. I'd get a branded one as soon as possible. If you can post a picture of the PSU, particularly the label (there should be a table on it somewhere with the ratings per line)

If a PSU goes it can sometimes take components with it.
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post #4 of 14
Thread Starter 
Quote:
Originally Posted by Plooto View Post

When your PSU doesn't provide enough power it blows. Sometimes it can burn a little inside and rarely it can damage your components. Use a PSU calculator online if you want to be sure.

Burn ? god...
seriously ?

PSUCalc gives me 500W
http://extreme.outervision.com/PSUEngine gives me :
Minimum PSU Wattage: 424 W
Recommended PSU Wattage: 474 W

Pretty close if my PSU is 3 years old...
Quote:
Originally Posted by Zorginator View Post

Never use an unbranded PSU. A good 500W will power that lot no problem. An unbranded one would be just silly. I'd get a branded one as soon as possible. If you can post a picture of the PSU, particularly the label (there should be a table on it somewhere with the ratings per line)
If a PSU goes it can sometimes take components with it.

I will check tonight.
I can't remember because it was my friend's computer, and he built it.
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post #5 of 14
Quote:
Originally Posted by Plooto View Post

When your PSU doesn't provide enough power it blows. Sometimes it can burn a little inside and rarely it can damage your components. Use a PSU calculator online if you want to be sure.

Only the crappy ones do that, decent and good quality PSU's just shut down, they don't cause any harm to the system.
post #6 of 14
Quote:
Originally Posted by bR0ken_pr0Jector View Post

Only the crappy ones do that, decent and good quality PSU's just shut down, they don't cause any harm to the system.

I've had an Antec 380 actually pop a cap and take out the motherboard and processor. It can happen on any PSU, just less likely on the higher quality ones.
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post #7 of 14
How about looking up and seeing the no. of amps under the 12v+ rail?
That gives a general idea of the wattage, and since its not branded, it might be a little less than that, or incase they got careless it might be more.

You plan to to go on the 560ti, so you might as well O/C the new CPU, I'd definitely say a new PSU, HX-650 (Its modular, neat) or TX-650V2 is what you're looking at (From corsair). If you are low on budget you should be able to get away with Coolermaster GX-550.
And the 560ti does take in a significant amount of power.

p.s. it doesn't hurt to have a few extra watts up the sleeve

edit - just noted you already have the 560ti, so its strongly recommended to get a new quality brand PSU.
post #8 of 14
You most certainly should get a new PSU.

If what you have is rather generic and old,
then you really are pushing it.

If a PSU goes, it will rely on the quality of the unit to take the hit,
and not share damage with connected components.
Quality units have various protections for power, voltage and current.
I believe they can be a part of what saves your other hardware if the unit blows.

Make sure the new unit is 80+ certified at the very least.
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post #9 of 14
Silly question but you did put the 6 pin power to the 560 correct?
post #10 of 14
Quote:
Originally Posted by DJCHUBBZ View Post

I've had an Antec 380 actually pop a cap and take out the motherboard and processor. It can happen on any PSU, just less likely on the higher quality ones.

That doesn't mean it was overloaded, though. As I've said any decent power supply is designed to shut down when overdrawn, they don't (normally) design good PSU's with caps that are overloaded as soon as, say, the 12v OCP threshold is passed. Of course component failure can happen on any electronic device, but we're talking about what happens when a threshold is passed on a PSU, not what could fail. The guy I quoted made a sweeping generalization in regards to that which was false, and that is when a decent PSU cannot provide the system with enough power, it shuts down, whereas crappy ones are prone to actually exploding because they are built with components that can't handle that amount of power in the first place.
Edited by bR0ken_pr0Jector - 4/4/12 at 10:55am
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