[Troubleshooting] PSU or MB problems

So here's my setup:

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (Purchased For $239.90)
Motherboard: Gigabyte GA-Z87X-UD4H ATX LGA1150 Motherboard (Purchased For $189.99)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1333 Memory (Purchased For $66.99)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (Purchased For $69.99)
Video Card: Gigabyte Radeon HD 7950 3GB Video Card (Purchased For $254.99)
Wireless Network Adapter: TP-Link TL-WN851ND 802.11b/g/n PCI Wi-Fi Adapter (Purchased For $23.99)
Case: Cooler Master CM 690 II (Black) ATX Mid Tower Case (Purchased For $89.99)
Power Supply: EVGA SuperNOVA NEX750B BRONZE 750W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (Purchased For $79.99)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (Purchased For $17.99)
Other: XIGMATEK eXTREME SILENT Series XSF-F1252 120mm (Purchased For $12.99)
Other: NZXT Sentry-2 5.25" Touch Screen Fan Controller (Purchased For $24.99)
Total: $1071.80


So, it all began when I ran Crysis the first time. I heard a whining noise which would change pitch as I did different things in the game (going to the menu, changing map, etc.) I pinpointed the source of the sound to the PSU. I chalked it up to capacitor whine, however on a brand new PSU that should definitely not be happening. After a week, something new would happen. The computer would crash (completely turn off instantly) and restart every time I tried to open Crysis. In the Event Viewer, a Kernal Power error, code 45, was thrown. This isn't very helpful, as it just tells you what you already know: the cumputer shut down unexpectedly. After a week, the issues increased. The screen, simply on the desktop, in windows, browsers etc. would tear vertically (horizontal tear lines) whenever moving windows aroumd. After even longer, a few days, the screen would tear just sitting and doing nothing.

Coming out of screensave mode, the computer will freeze on a black screen and require a restart. When I remove the graphics card however, and use integrated graphics, the computer freezes coming out of sleep mode instead (which I'm fairly certain is sourced from the motherboard). None of the screentearing or PSU whine occurs when using integrated graphics. However, sometimes I will come back to the computer after a while and the HDMI output won't be working, regardless of pugging/unplugging and it's not my monitor.I started getting infrequent BSODs as well, the minidump for which I've attached.I've looked at the BSOD minidumps, and the reported source of the hardware malfunction is GENUINE INTEL (CPU). Perhaps you can get more specific information out of it. Memtest and CPU stress test have all come back clean. So based on all of this, your first thought would be faulty GPU right? Well I RMAd the card, got it back, plugged it in and no change. I also switched cards with a friend and mine had no issues on his system.

My theory is the motherboard is faulty, causing the GPU to attempt to draw excessive power from the PSU (causing the whining) and causing the system to think the problem is with the CPU.

Here are the links to the minidumps:

http://www.4shared.com/file/UoPPDMtMba/060108-23899-01.html
http://www.4shared.com/file/hzggWTkBce/110413-21762-01.html

I hear you, however I believe that Gigabyte has an even better track record. Admittedly, a MB has a lot more that can go wrong with it.

That being said, is capacitor whine on a brand new PSU such as this common at all? The sound definitely does not sound normal, and I'm RMAing for that reason as it is.