Can my 500W power supply Handle 493 watts?

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oggyphillips

Distinguished
Feb 15, 2015
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Soon I'm gonna have 2 rx 480s in crossfire, since I have a crossfire mobo. When I went on pcpartpicker, the estimate of the amount of watts I would use is 493. I have a 500-watt power supply. Is this safe?

PC:
i5 4460
Gigabyte GA-B85-HD3-A
8gb crucial ram
gtx 960
120gb ssd
1TB HDD
corsair 200R
EVGA 500W
 
Solution
Dunlop0078
Absolutely not. That power supply is quite lackluster as it is, running two 480s on it is a bad idea if it works at all. I would not recommend any 500watt psu for crossfire 480s never-mind a budget 500watt psu like the EVGA 500.
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desproyer

desproyer

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Jun 15, 2016
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your pc whould shut off every time your sytem goes into load...
and if it is a bad psu it would drag some components with it to dead.

 
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Professur

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May 7, 2016
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10,760
You can physically boot up your computer, but when it come to gaming, there are going to be spikes (10 ms ~ 50 ms) which the power draw would exceed whatever the cards say... worst case a module would get fried - no big deal, right?

That's why old timers went with the 50% rule. For modern system and tier 1 PSU (not budget PSU) you can go with 70% (which is 493W/0.7 = 700W). Look into the EVGA P2 or G2 750W.

 
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