PC cutting out after intense usage, power issue?

[roboguy]

Hi

my pc is made up of..

Q6600 @2.4ghz
4 x 2GB DDR2 6400
7200RPM 500GB HDD
DVD+-RW
2x 8800gtx in sli
P5N32-E SLI Plus Mobo
2 12cm case fans
stock cooler

my psu is this guy here Thermaltake TR2 W0379RU 500W ATX 12V v2.2 Power Supply, sorry cant post links yet

500W

when im gaming etc after about 20 mins my pc literally just cuts, now i don't think its a problem with the cpu as prime95 runs all night but with intense gpu usage it cuts,

i recently added the second 8800gtx,

is more power required? what should i go for if i need another psu?

thanks

[GoNz0]

probbaly the motherboard overheating.

[AdamAnubis]

It'll either be heat from the GTX's or power usage from them killing the system. Check what amps the 12V rail runs and make sure it's adequate, but tbh if it's lasting 20 minutes it's likely to be temperatures.

Download speedfan and see what temps they're idling at.

[Terbinator]

8800GTX in Sli is quite a power hog.

[Flash477]

Have you tried running the system with the side of the case off - does it do the same thing?

TBH my money would be on a heat issue.

[kalniel]

Possibly a combination of both - as temperature rises components become less efficient and the PSU might become overloaded.

[roboguy]

definatley not the cpu overheating, got one of these big a$$ akasa freedom towers on it. gets to 50 degrees max on prime95.

air coming out doesnt seem that hot apart from the PSU which is like a jet engine.

also the nb and sb are passive and apparently get really hot.

i will report the ampage on rails when i get back from work.

[Flash477]

Remember though that you have to think about where the air is going as well, if a lot of your fans are pushing air around inside the case rather than exhaust fans pushing the air out of the case, then the ambient temperature inside the case will increase, so that means that the fans are trying to cool the components with hot air

[roboguy]

i think my cooling ok, i have to input fans one on the side, one on the front and and a big 12cm exhaust out the back.

I have read up and the motherboard has two 4pin inputs for the cpu, one is blocked out as stock for single core cpus, you need both plugged in for multi core.

i distinctly remember wondering why there was a black cap block on of the power plugs, i will plug this in and try it out tonight.

thanks everyone

[Lee H]

8800GTX in Sli is quite a power hog.

This is what I reckon it might be as 2 8800GTX in SLI are reported to use quite a bit of power ;



Add to this CPU, optical drives and whatnot I reckon 500W is breached under full load.

[kalniel]

Add to this CPU, optical drives and whatnot I reckon 500W is breached under full load.

They were added, that's why it says 'whole system'

[kalniel]

air coming out doesnt seem that hot apart from the PSU which is like a jet engine.

That is what I was talking about. If PSU is hot then it's not as efficient.