Possible PSU issue?

[mark1305]

My new pc is all up and running, and very smoothly at that. however....

when running very gfx intensive games it seems to restart after about 5mins at very most. i checked for any overheating or memory issues and nothing was apparent.

ive checked my power usage and i use a 650W PSU with dual 12V rails, according to my monitoring software im pulling 23.67V (leaving me with .33V) and thats when im not running any games, would the voltage increase during gaming and could this be my problem?#

Thanks!

[The Wise Monkey]

Yes, that would be an issue. XD

What hardware are you using?

[mark1305]

Thanks for your reply,

Im using.

Gigabyte MA770-UD3 Board
4GB Kingston Hyper-X DDR2 1033Mhz
ATI Radeon 4890 HD 1GB
500GB Western Digital SATA Drive
LG DVD/RW
Aerocool LCD Temp Monitor and Fan Controller

Also running 6 Fans all together, i have tried disconnecting right down to 3 (intake,exhaust,cpu)
and problem still persists.

Thanks

[mark1305]

just to add, my PSU is a Powercool 650W dual 12V rails 14A/16A (seems pretty low ampage to me aswell)


Why didnt i check the stats when i bought the thing lol!

[The Wise Monkey]

That is very low, and that is the problem with PSUs - wattage isn't everything. 650W should be perfectly fine for your system, but I think that it is the low ampage that is the problem - the two 12V rails should always be pulling that much.

If you can stretch to it, this Corsair has a massive 60A on its 12V rail, and is one of the best PSUs you can buy at the moment. If not, the 650TX costs a bit less and will also be fine:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139006

[zburns]

If you will go to this link, you will find a table of outputs for the Powercool 650 watt psu. http://www.overclock.co.uk/product/PowerCool-650W-PC-650AUBA-Dual-12v-V2.2-80+-Effici_6491.html

The problem is I went thru the numbers and could only get 506 watts. Take each voltage output multiplied by the amps below it. Sum it up and see what you get.

At the top of the page, they mention 80 percent efficient. What does that mean? 650 watts running at 80 percent efficient computes to 520 watts!

Sounds like you need to contact the manufacturer and the supplier and ask some questions. Or the information is printed wrong on the webpage.

Watts is Voltage X Amps.

[mark1305]

Thanks Zburns i'll give that a go.

I've just ordered (also from OCUK) an OCZ ModXStream 700w Modular supply with 25A per rail, i take it that should be sufficient for my system?