Computer shuts down Playing Games

Hi I wanted to start this thread about my computer that shuts down as soon as certain games start.

I have an alienware Area 51 ALX

12 gb ram
amd 6990 saphire card (I have 2 but removed one and get the same problem)
I7-975
CPU is liquid cooled
1.2 kw power supply

(Almost all the parts from the motherboard, video cards, radiator, fans, power supply, have been replaced already and the error continues.)
Troubleshooting I did:
Ran this dell mem test thing and all memory passed
Checked cpu using torture test with prime95: no errors
used GPU-Z: temps dont seem to get that high

The games dont even run this is on a clean install of windows 7 nothing else installed except fresh video card drivers 12.4 and steam. As soon as I switch this one game Cursed crusade for example to 1920x1080 resolution the computer just reboots, no bsod or anything. Other games once the game starts it reboots.

At this point they want me to do a system exchange, the problem is my machine they dont make anymore, which would mean downsizing to an alienware aurora that with dual 6990's I am pretty sure would melt. I would like to keep this system so I would rather find a solution since it may be something that I have not checked.

I see the same error as previously before doing a clean install. (also os is on diff hard drive now)

I get event Id 41 kernel-power The system has rebooted without cleanly shutting down first this error could be caused if the system stopped responding, or lost power unexpectedly.

Using Prime95 I ran all of the tests on the CPU, Temp never exceeded 78 on any of the cores, in fact it would max out there, the CPU is liquid cooled.

Using GPU-Z and fuzzy donut The temp on the bottom card would reach up to 105 while the top card would max at about 95. I would turn off the test at 105 to prevent actual damage.

I am not overclocking anything, I payed 1500 extra for the processor when I got it since I felt paying more meant getting a better product so I am not sure if it is overclocked or not, it is an i7-975. Im thinking of tossing it now anyways for a 6-core.

Steps I have taken:
Removed the bottom graphics card meaning only one is intalled running gpu-Z the temp never went over 98 on the single top card.

Problem:
It still shuts down, there is no time delay, the entire computer just shuts down. For example a way i test this fast is using Cursed Crusade as soon as I set the resolution to 1920x1080 the computer shuts down.

What might help:

One time before I did a reinstall of the OS I looked at an error report from a windows tool and I forget which. I was following a tutorial and it was before the performance test. The error was tvmgrerr or something like that if it rings a bell. I would like to know how to find this again.

Also not that I think it matters but maybe it does, but in devices there is an unknown device, it was there before the fresh install and is there after even with nothing attached. I have no idea what it is and the hardware id just says USB unknown.

Thanks and the card was very hot so it is good advice do not grab it with hands since it will burn a person.

Yes I am not sure where that error came from or where I saw it. I can not seem to locate it again. I did see it using a windows event tool. The cards are brand new, this is the third set, they all seem to do the same thing. Killing me trying to figure out what is causing the whole computer to shut down, does not seem to be a heat issue since the card does not heat it up. The computer just shuts down immediately no chance to warm up.

Far as the unknown device I am clueless to find what it is or if it matters, but it would be one less thing to worry about if I could fix it.

What steps to you suggest for identifying the unknown boot device?

I will search for that error later when I can access the computer. for that error we want to find,

usasma said:

I suggest scanning through the reports for information about the system and for information about the unknown USB device. Most commonly, a hardware ID or PnP ID can be used to help identify the device. I've started a table for that here: PNP Device ID's but google/bing searches still seem more fruitful.

Where can I find the PNP device ID? Under hardware ID it just says, USB/Unknown