Monitor loses connection and PC locks up when playing TF2

[Mashu]

So, yeah, I've been having this issue the past few days where I'll be playing some TF2 when the screen will suddenly go black and start searching for a connection. The sound will also suddenly stop playing. Oddly enough, when this happens, the computer's fans work at a surprisingly high speed, much higher than they usually do when playing TF2.

This happens about once a day and seems to only happen when playing TF2 for a good couple hours.

Here's my PC specs.

M/B - ASROCK Z75 PRO3 Z75 LGA1155
Video Card - XFX AMD Radeon 7850 1GB
PSU - ROSEWILL | HIVE-550 550W
CPU - INTEL CORE I5 3570K 3.4GHz
RAM - 2x 4GB CRUCIAL Memory (8GB)
HDD - WD 1TB 7K 64M SATAIII
Monitor (just in case it is something wrong with the monitor, though I doubt it) - ACER LED 21.5" 5 MS

Checked through the Event Logs, nothing in particular. Any help?

[icehat]

Sounds like a hardware issue to me.
Are you getting this on any other graphics-intensive games?

[Mashu]

From what I can see, it only seems to happen to TF2, and not other games, even games more graphically intensive like Skyrim.

[Freb]

I just recently started having the same problem. This is very curious. Did you ever figure it out?

[Mashu]

It doesn't happen to me anymore, but what I suspect is that the settings are set so that the game's refresh rate is different from your monitor's; this has occured when I boot up Civilization V sometimes. As for the locking up, I'm not really sure what that could be.

Another possibility is that your PSU is dying. I was a bit stupid a little while back and tried to overclock my CPU without looking at documentation. Even after setting it back, I think it permenantly damaged it, because I've been having some issues that appear heavily connected to PSU damage.

[Freb]

Oh, thanks for the response! The refresh rate idea is interesting and more likely to be my issue, as I have never overclocked my computer, but I will investigate my PSU's health as well. Thanks a lot!

[Prozak]

Woah. Woah. Woah. I'm having this same problem - it's happening faster for me though, about every end of round in TF2.

[Freb]

I wish I could help you. I lose connection to my monitor within a minute or two after joining any tf2 match, and I know it's not because of my screen refresh rate (I set tf2 to run at 60 hertz like my monitor expects) and it's not because of hardware failure (I downloaded a hardware-monitoring program and everything is running perfectly while tf2 is open).