Hello!

Can you confirm, when this problem occurs does the monitor loose signal completely?

If so, make sure that on BIOS/Advanced/Integrated_Devices the PCIe-Gen3 is disabled and that the monitor is connected to one of the NVIDIA GTX670 video ports and not the ones on the Motherboard. You can check the available Video Card connections here.

You should also verify that you have the latest BIOS A04.

Let me know how it goes!

Thanks for responding. I can confirm that the Gen3 is disabled and that the monitor is hooked directly into the gtx. However, I do not have the BIOs A04. I will proceed with that and report back after a few days of use to see if this fixes the problem. Like I said it only does it when it wants to, it can work perfectly all day long, but on some days its constant black screen during gaming.

After installing the BIOS you asked me to im still having the same problem. Any more suggestions?

Let's run a Gaming Test on AlienAutopsy. Check for CPU and GPU temperatures, FPS drop and let me know if you get any errors or if it crashes during the test as well. 

Hello again. All the tests have passed without a crash of my monitor going off. I would like to mention I use a custom fan curve using MSI AFTERBURNER, which keeps it up to 5-10C cooler than the system would itself default. Before using MSI AFTERBURNER I would have temps up to 89-90c. With my custom fan curve now it never goes over 85c. This is the only thing I have changed in the afterburner, all the other settings are default for the system still other than my fan curve I had created. The CPU temps are at a healthy 40c or so as well. (Note even before using MSI afterburner the system still had the same problems, so MSI shouldnt be to blame).

The monitor cutting off and the system staying on is still the issue here. Sometimes the the gfx card drivers will recover and I can keep playing. Or the monitor stays black and I'm forced to restart manually.

*Note* I've already had the alienware swapped out with a completely new system and hardware before through talking with support many months ago. (Still the same problem) (Black screen and forced to restart).... I gave up for awhile, but I noticed my warranty only has a few months left so It's better I try to figure this problem out now or call support and get another system for a third time... 

Anymore help to figure this out would help lots!

Send me your Service Tag and link to this thread on a personal message so I can review your case further. 

Hey, I have exactly the same problem on the same X51 R2 with the same GPU...

My system goes black totally random, most of the times while gaming, today it restarted 5-10 seconds after I pressed the power button. And it did it 6 times in a row... Sometimes the computer is still running but the display is black, other times the fan goes crazy (makes a lot of noise) then after 10 seconds it shuts down. 

I installed MSI afterburner  to check the temps, I also tried to create custom profiles to increase the fan speed from lower temperatures. Sometimes it's crashing at around 84 degrees other times at 50-60...

I have this problem from the first day (1-2 months ago...) I tried everything... nvidia drivers, dell drivers the drivers that windows 8 is installing... but the result was the same

My monitor cable is going to nvidia gpu not to intel one, my bios is 04 and the pci 3 is turned off.

Please help me!

Send me your Service Tag on a private message as well. 

I did

I just made some tests with FurMark and I recorder 2 of them.

I have the latest dell drivers for my GTX 670. I set the screen resolution to 1024x768 to be able to record.

- Here is the first test with all the apps closed just after a fresh restart. My X51 crashes after 2:40 minutes at 83 degrees while the fan is at 61%.

https://www.youtube.com/watch?v=cbagfSNdakI

- In the second test I made a MSI Afterburner fan profile to help the cooling. So i set the fan rotation % up to 10 points bigger than the temperature. It crashed again after 6 minutes at 75 degrees. The time is random I repeated the test 2 more times with some 5 minutes breaks between them. The second time it crashed after 1:20 minutes and the third time after 4 minutes. Both of them happened while the temperature of the gpu was between 70 and 80. 

https://www.youtube.com/watch?v=cF23H-PUHsY

MSI Afterburner also showed me the GPU load if I'm not wrong (it can be seen in the second video, small yellow font). It was all the time around 107-108 %, I don't know what this mean....

So, I brought this computer 1-2 months ago, it wasn't cheap, but I wanted Alienware because I didn't wanted headaches. It is crashing from the first day and now I really got tired of reinstalling drivers/windows and make tests every day...

Any kind of guess, tip, opinion is appreciated!

Thanks!