Random Crash, PSU?

[kicker22004]

High guys i'm having an issue with a recent build,

CPU-AMD FX-8350,
http://www.amazon.com/gp/product/B009O7YUF6/ref=oh_details_o05_s01_i07?ie=UTF8&psc=1

Ram-8gb DDR3 1866 MHz

http://www.amazon.com/gp/product/B0056KUWS4/ref=oh_details_o05_s02_i00?ie=UTF8&psc=1

Mobo-ASUS M5A97 R2.0

http://www.amazon.com/gp/product/B008V9959O/ref=oh_details_o05_s01_i06?ie=UTF8&psc=1

Video-Gigabyte AMD Radeon HD 7950 3GB

http://www.amazon.com/gp/product/B007581QHG/ref=oh_details_o05_s01_i02?ie=UTF8&psc=1

Cooler-Antec Kuhler H2O 920

http://www.amazon.com/gp/product/B004OD7N0O/ref=oh_details_o05_s01_i04?ie=UTF8&psc=1

HDD-Seagate Barracuda 1 TB

http://www.amazon.com/gp/product/B005T3GRNW/ref=oh_details_o05_s01_i05?ie=UTF8&psc=1

PSU-Corsair CX750 Builder Series

http://www.amazon.com/gp/product/B008RJZQSW/ref=oh_details_o05_s01_i03?ie=UTF8&psc=1

Case- Antec 900

dvd burner-nothing special
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Ok those are the specs, i was on a tight budget is why i didn't get some of the extras, ssd,better board ect.

So i got it up and running Windows 7 64-bit and all was good.

This machine was build to play games like League of legends, World of warcraft, Starcraft 2, Diablo 3, Guild wars 2...... basically nothing serious.

I ran a few runs of WoW and had no issues, However when i installed League of Legends i noticed graphical glitches (turned out a Video driver update). Then installing Starcraft 2 went well until i loaded it and during the tutorial it just blacked out (No weird sound or bluescreen)
The tower was light up but nobody was home and i was forced to reset, after restart there was a Kernel-power event in the windows log. That was one. The next time was during downloading Guildwars 2.

I noticed one thing while playing Starcraft 2, I took off my headphones and heard a whinning noise coming from my PSU, If i leave the game it stops but as soon as i get into the game it starts crying. So my question is am I under powered for this rig? (I don't think so) If so then what PSU should i get if that is the issue. Side note yes i'm sure it is the PSU whinning and not the GPU. Also temps are all below 43c. Thank you guys for your help

 

[kicker22004]

Anyone?
Bump..