Well you can get the free program MSI Afterburner, and set a fan curve for the GPU fans, this will keep your temps down.
Too much heat can cause freezing, but so can corrupt drivers.
I would start with doing this, just to eliminate driver issues...
DDU Instructions - Nvidia/AMD1. Get this program, here:
https://www.wagnardsoft.com/ ...get the latest version, and save it to your desktop.
2. Get your vid card driver here, use the
Manual Search: Nvidia:
http://www.geforce.com/drivers ...or AMD:
http://support.amd.com/en-us/download ...save this to your desktop.
3. Run DDU (Display Driver Uninstaller) choose: Nvidia or AMD, then choose the "Highly Recommend Option", and just do what it tells you. If it wants to go into "Safe Mode", let it.
4. After it's done and comp has rebooted to normal mode, just double click the Nvidia or AMD driver ( that you saved to your desktop in step #2) ...to install. If it want's to reboot, let it.