Computer Screen freezes only while playing video games

[Atif Mehmood]

I have recently purchase a new system ( 2 weeks back). All hardware is brand new except for the graphics card.
The hardware specs are:
OS: Win 7 64 bit Service Pack 1
PSU: GX-650 watt
RAM: 8 GB DDR3 Kingston Single stick
Processor: Intel Core i5 4670k 4th generation 3.4 ghz
Graphics: Nvidia XFX Gts 250 512 mb
Motherboard: Intel DB85FL
Hard Drive: Seagate 1 T.B

Ok, Now the problem is that whenever I play any video game (such as GTA IV, Devil may Cry DMC, Metro: Last Light), my computer screen just freezes after 5 to 10 minutes of gameplay. My keyboard and mouse stops working and the sound just stops. Only way to get out of this freeze is to restart the system manually. Recently I put out my graphics card from the motherboard and played the above mentioned games with intel hd graphics 4600 (Built-in) and no freeze occur whatsoever and I played for hours.

But my gpu never had any of these problems when it was installed in my old system and games works just fine. Need to mention that my gpu is PCI-E 2.0 and my motherboard supports a PCI-E 3.0 graphics card. I have read many forums that motherboards have backward compatibility and can run 2.0 cards as well. Also used windows memory diagnostic tool and it did'nt find any problems with the ram.I have also stressed the graphics card using Furmark but my gpu temp. reaches to abotu 100"C and I stopped the test.

Please help me out here because I dont want to purchase a new card and I am just curious that it might be possible that the PCI-E slot is busted.

 

[Tmagic650]

100C= 212 degrees Fahrenheit, pretty hot. The video card may need to have new thermal paste applied. Yes, the PCIe 3.0 is backwards compatible. Do you have all the Windows Updates, including all the optional ones installed?

 

[Atif Mehmood]

Yes all updates are installed...even the optional one too. This temp reaches only when Furmark stresses the GPU. Otherwise while playing video games it reached to about 85 C. Also in the beginning (1st week of purchase), the video games can run for about 5 to 6 hours. I have ended Metro:Last light in this system. But the problem still occurs after 4 to 5 hours. Now they can only run about 5 to 6 minutes max before the hang occurs.

 

[Tmagic650]

Open up the case and run it that way for a few days. See if the game play improves

 

[Atif Mehmood]

Open the case today and put system under room fan.......The gameplay did improve and I played like 16 minutes and the hang occurs again. So is this an overheating issue. But my question is that in Furmark it reached to about 100 C and no hang occurs. I stopped the test because that temp. was too high.