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System hangs and refuses to power up after reset. Pls Help!

Last response: in Components
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My systems hangs after around an hour of gaming. After a hard reset, it doesn't power up. However, i'l be able to turn on the system again after a couple of hours. This started happening when i changed my harddisk from 500gb to 750gb.

Is this a cooling problem or power supply problem?

The following are some of my system specs.
- E8400
- Gigabyte ep45 ud3p
- gigabyte 9800GT
- Seagate barracuda 750gb 7200rpm SATA
- andyson 500W PSU
- CM Centurion casing

No overclocking done. Stock cooling. All help is greatly appreciated.

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Welcome to the forums!

Check your temperatures, video card and CPU while gaming.
Put a fan to the side of the case.
I think you need a better PSU in any case.

Top Tier PSU:

http://www.tomshardware.com/reviews/power-supply-roundu...

http://www.tomswiki.com/page/Tiered+PSU+Listings?t=anon

http://www.xtremesystems.org/forums/showthread.php?t=10...

http://www.anandtech.com/casecoolingpsus/showdoc.aspx?i...

http://www.eggxpert.com/forums/thread/323050.aspx

http://www.jonnyguru.com/forums/showthread.php?t=1460

http://www.tomshardware.com/reviews/power-supply-review...

http://www.techreport.com/articles.x/16073/15

Silent PSUs
http://www.silentpcreview.com/article699-page1.html

AMD Certified PSUs (Single+Crossfire):
http://ati.amd.com/online/certifiedpsu/index.html

Certified SLI-Ready Power Supplies
http://www.slizone.com/object/slizone_build_psu.html

Hybrid-Power (Hybrid SLI) power supplies:
http://www.nvidia.com/object/geforce_9800gx2_pwr_supply...


 
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