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Is this PSU enough to run my pc

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October 3, 2009 5:21:37 PM

I am planning to buy a pc next week
My config is
AMD 545 BE
biostar 785
9800gt
DVd drive
250 HDD
4 GB RAm
PSU Corsair CX400

I asked a forum abt the psu and they said tht this psu can run this config but u cannot be safe with it because the psu will be stressed very much at load and tht it would not last long.Is this true?Am i taking a big risk by buying this psu?.I am not going to do any overclocking.

More about : psu run

October 3, 2009 5:31:02 PM

it should be enough, but get the corsair ~ 500W, just to be on the safe side, and its not big difference in money anyway.
October 3, 2009 5:32:08 PM

yea 500 better
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October 3, 2009 5:42:12 PM

They of course mean you should get the Corsair VX450W, even though the CX400W will be more than enough, even with overclocking.

I say the CX400W is fine, the OCZ StealthXStream 400W is also fine and is probably cheaper.
October 3, 2009 5:43:51 PM

did i ? o ok that 1
October 3, 2009 5:46:46 PM

So i will go for a corsair vx 450.Thanks guys
October 3, 2009 5:54:07 PM

ghost111 said:
So i will go for a corsair vx 450.Thanks guys


It's your money, but I'm telling you the 400W ones from Corsair and OCZ would be fine as well, people are talking out of their asses when they tell you those PSU's won't last long with your rig, you'll never get to more than 70% of max load (that's with overclocking and everything including the DVD-RW running at 100% capacity) and that's considered a very safe percentage with such high quality PSU's.
a c 124 ) Power supply
October 3, 2009 6:15:08 PM

Calculate what you need yaself:

http://www.antec.outervision.com/

In the drop downs, I use:

-Hi end desktop
-85% CPU Utilization
-90% system load
-25% capacitor aging

That should give you the draw to expect when system is under load. Personally I multiply that by 1.5 to get my peak power rating .... so if the calculator told me say 300, I'd buy a 450 watter. This number can be reduced somewhat if you buy a better quality PSU such as the HX from Corsair or the Signature Series from Antec but running closer to peak load also affects efficiency and noise so I like to limit max draw to < 70% of max
October 3, 2009 6:20:22 PM

JackNaylorPE said:
Calculate what you need yaself:

http://www.antec.outervision.com/

In the drop downs, I use:

-Hi end desktop
-85% CPU Utilization
-90% system load
-25% capacitor aging

That should give you the draw to expect when system is under load. Personally I multiply that by 1.5 to get my peak power rating .... so if the calculator told me say 300, I'd buy a 450 watter. This number can be reduced somewhat if you buy a better quality PSU such as the HX from Corsair or the Signature Series from Antec but running closer to peak load also affects efficiency and noise so I like to limit max draw to < 70% of max


That calculator doesn't distinguish between 12V rails and the rest and is thus useless, you'd be better off just adding the TDP's of the devices and comparing that sum to the max combined 12V wattage of the PSU.
October 3, 2009 6:28:10 PM

guys i calculated with both from antecs and corsairs.Antecs one gave me 252 watts.Corsair recommended CX 400 followed by VX 450.Any of them will do says corsair.
October 3, 2009 6:34:31 PM

ghost111 said:
guys i calculated with both from antecs and corsairs.Antecs one gave me 252 watts.Corsair recommended CX 400 followed by VX 450.Any of them will do says corsair.


And they're right, the CX400W will do, as will the OCZ StealthXstream 400W, get the cheapest of those two.
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