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HDMI 1080P Shuts down Windows 7 (Need Help)

Last response: in Windows 7
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August 31, 2010 6:04:53 AM

AT first i thought my Graphics card was failing so i unplugged it and hook to the vga on my onboard graphics of my 8200 MOBO XFX.... No problems for Hours... So I hook it to my 52inch Sharp Aquos using a dvi-hdmi adapter.... Run it at 720 for hours.... No problem.. So im like damn my graphics card is going... But then i put the settings to 1080p and 10 minutes later it shuts down as if it were overheating... But its barely capping at 65celcius So thats not it... I hook my 9800GT OC-SC run it at 720P at minimum clock settings no problems for hours running 80-120fps on my game... So i switch to 1080p still running around 70-90 fps and the GPU is at 63celcius... 10 minutes later it shuts down like i just pulled the cord or like its overheating... (Which it is not)

Specs:
500watt Ultra PSU
Cooler Master Liquid Cooled 1-3 coolant solution...
5 120mm Fans X-Dream Case (flows amazingly)
3 80mm Fans for exhuast 2 Rear one front
XFX 8200 2.88ghz-x4 Proc 1gb Ram
9800GT Superclocked 512ddr3

Its not hardware for sure at this point so has anyone found fixes to this or am i pretty much stuck at 720 on massive tv's?

Also It doesnt shut off it I take off the side panel and run 1080p with a Massive fan... Wierd huh? VGA Runs fine at 1920-1050 any help would be greatly appreciated...
a b U Graphics card
a b $ Windows 7
August 31, 2010 12:55:57 PM

You can tell the computer in bios the temperature to shut down at.
What's the temperature of the CPU?
It definitly sounds temperature related.
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August 31, 2010 2:46:46 PM

57celcius when i start it up after it shuts off... so 60celcius maybe??
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a b U Graphics card
a b $ Windows 7
August 31, 2010 3:11:05 PM

That shouldn't be a problem. Do you have bios settings for temp?
In my asus and gigabyte boards there was a hardware monitor section that showed actual temps and an alarm setting and a shutdown setting for temps.
Have you installed the latest MoBo drivers?
http://www.nvidia.com/Download/index.aspx?lang=en-us
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August 31, 2010 4:26:01 PM

Yes I have... Going on the fact that it could be cooling related i took my water cooled heat sink off the cpu and found that my Artic Silver was dry and crusty... Just put a nice new tube of it on the cpu reapplyed the Liquid cooler and Im using it right now... its been on for about 10minutes now so wish me luck...
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a b U Graphics card
a b $ Windows 7
August 31, 2010 5:39:28 PM

Good Luck!
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September 24, 2010 6:20:21 AM

Well I found out it was caused from overclocking my CPU but still everyonce in awhile it shuts down i just cant seem to explain it... replaced all 80mm to 120's 97cfm runs extremely cool even for crisis engines... also using a 250gt 1gb now and 8gb ram... changed alot...
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