Computer Freezes But Audio Continues Playing (+ Other Issues)

Apologies for the repost, but I posted this in the games section but didn't get any replies.

I've been experiencing some random freezes with my computer recently, at times it will randomly freeze during games (e.g. Path of Exile, TitanFall) and even outside of games but the audio will continue to play on. Trying to use the keyboard's capslock button to check if the computer is still responding, tells me that it isn't (since the light doesn't change), so I tend to turn it off at this point via the power button.

After which, when the computer powers up, the monitor fails to detect that the computer is on, giving a "no signal" and/or continues sleeping. When this happens, I have to power cycle the computer multiple times until the monitor can pick up that the computer is on and shows something on screen.

I'm not sure if this is a PSU or GPU issue, but I've tried using driver cleaner on my ATI card recently and tested it using 3dmark basic and it didn't freeze then.

Experienced a BSOD just now as well, added the minidump. Prior to the bsod, I got this (notresponding.png) from titanfall.


Quote:
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz, Intel64 Family 6 Model 42 Stepping 7
Processor Count: 8
RAM: 16367 Mb
Graphics Card: AMD Radeon HD 6800 Series, 1024 Mb
Hard Drives: C: Total - 244096 MB, Free - 27707 MB; D: Total - 464010 MB, Free - 53712 MB; E: Total - 457069 MB, Free - 74610 MB; F: Total - 953865 MB, Free - 188941 MB; G: Total - 32684 MB, Free - 573 MB; H: Total - 1907726 MB, Free - 91769 MB; I: Total - 99 MB, Free - 69 MB;
Motherboard: Gigabyte Technology Co., Ltd., H67MA-UD2H-B3
Antivirus: avast! Antivirus, Updated and Enabled

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