Electrical Sounds (Possibly GPU?)

I've had this PC about 6 months now and I've never had any problems playing any games before. But recently I tried playing Borderlands 2 and it would start making a very loud electrical sound after awhile. I tried ignoring it but it started getting very loud so I just stopped playing and let my PC rest awhile. I tried playing the same game a few times and the sound will just keep coming back and back.

I played 70 hours of this game on this same computer and never had this problem before but just before it started making I had to leave it out in the car for a few hours with very high humidity. Also, I've been moving around alot lately so it's been moving around alot also. I've tried cleaning the PC with an air blower but I don't have the tools right now to open it up. I also thought maybe it was just BL2 as nothing else I do on the PC causes it to make that sound but any graphically intense game such as Wolfenstein seems to cause it as well.

Vanquisher 3 Level 2
OS: Windows 8.1 64-bit (6.3, Build 9600)
CPU: Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz (4 CPUs), ~3.3GHz
GPU: NVIDIA GeForce GTX 760
MB: ASUS H81M-D PLUS Rev X.0x
RAM: 8192MB
AntiVirus: McAfee

Edited by Perfice - 25 Jul 2015 at 2:16pm

It's more of a crackling sound.

6 months? Any cleaning schedule to remove dust bunnies and other critters that play havoc with electronics?

Give it a thorough cleaning, isolate the sound if possible (like said above) and to be safe, give DS a call on Monday morning.
















Edited by Snaike - 26 Jul 2015 at 4:10am