I have been having an issue with my GPU running really hot since last night. I have a particular game that reboots after 5 minutes of running. The outdoor temperature and humidity seems to be assisting in this overheating process. Are there any tests that I can run to rule out what is or isn't probable for the cause of this cooling problem?

Specs:
CPU - AMD Windsor AM2 socket 3.2Ghz
Motherboard - MSI K9A2 CF
Memory - G.SKill 2x2GB (4 GB total) DDR2 800
Video Card - EVGA Nvidia Geforce 9800 GTX+ 256 MB
OS - Windows 7 Ultimate 64bit
PSU - Mustiff 800 (800 watts)

Voltages/Temperatures Image (Idle Processing)



GPU Report Image (5 minutes of GPU Stress)



Keep in mind that the GPU Report was taken after a storm front blew in and cooled things off a bit. The cooler outdoor temp seems to have cooled off the GPU a fair amount.

The overclock is apparently factory. I didn't know it was overclocked actually.  I'm still learning the concepts and processes on how overclocking works so if you wanted to give me a little intro to altering speeds then I'd appreciate it. I did try using the CPU overclock utility tool provided by the manufacturer and blue screened if I made any adjustments at all. I did some research on it and understood that my motherboard doesn't support overclocking so I uninstalled the tool. The current OS is only 2 weeks old and I have not made any clock adjustments to any of my hardware since then.

I ran a stress test to see how stable it is. Threshold was set at 100 C by default.

Time: 13 mins
Temp: 96 C
Fan Speed: 100%
FPS: Roughly 320

No hicups but I don't like that it gets that hot.  I'll provide some links to my case and the fans I'm using so you can see images and specs.

Chasis model: http://www.newegg.com/Product/Product.aspx?Item=N82E16811146025
(2 Fans) Fan in front and on Side of Chasis: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103060
1 Fan in the back below the power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16811999344

The GPU cools off from 85 C to 60 C in about 5 seconds and then cools off to 55 C within another 5 seconds. So I think airflow in the case itself is fine. It could just be the fan is getting clogged (waiting on a can of air to blow it out tomorrow). But this thing has never run on the cool end. It usually doesn't give me temperature issues unless humidity levels get around 60% and 80 F or higher.

I did that about half a year ago but I was getting more like 72 C afterward at high stress. I wonder if my model has a different cooling fan or something. I've debated shopping for a mountable VGA cooler to replace the stock one.

Edit: It may be worth mentioning that I run in 1920X1080 resolution.

Here is a previous post in the thread answering your question about the fans. The links are the product listings at newegg (where I bought them) and they provide specs and images of the chassis and fans.

kmheckler
No hiccups but I don't like that it gets that hot.  I'll provide some links to my case and the fans I'm using so you can see images and specs.

Chassis model: http://www.newegg.com/Product/Product.aspx?Item=N82E16811146025
(2 Fans) Fan in front and on Side of Chassis: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103060
1 Fan in the back below the power supply: http://www.newegg.com/Product/Product.aspx?Item=N82E16811999344

As far as the cables go. No cables are blocking the main airflow. I have them tied together in a bunch and then hanging over by the empty drive slots on the front end of the chassis.

If all else fails I may look into that lifetime warranty. I don't have a different rig to use while I'm waiting on a replacement or whatever they would decide to do about it. So I'd rather not go without the computer for a while unless absolutely necessary.