What is wrong with my PSU / computer - video attached

Drummermean

Honorable
Oct 5, 2013
7
0
10,510
My build is below:

CPU Intel Core i5-4670K 3.4GHz Quad-Core Processor[4] £168.94 @ Amazon UK
CPU Cooler Phanteks PH-TC12DX_RD 68.5 CFM CPU Cooler[5] £39.74 @ Scan.co.uk
Motherboard Gigabyte GA-Z87X-UD4H ATX LGA1150 Motherboard[6] £134.98 @ Amazon UK
Memory G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory[7] £62.99 @ Novatech
Storage Samsung 840 Series 250GB 2.5" Solid State Disk[8] £133.35 @ Amazon UK
Storage Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive[9] £42.99 @ Amazon UK
Video Card MSI GeForce GTX 770 2GB Video Card[10] £249.59 @ Overclockers.co.uk
Case Cooler Master Storm Enforcer ATX Mid Tower Case[11] £74.38 @ Scan.co.uk
Power Supply Corsair Builder 750W 80+ Bronze Certified ATX Power Supply[12] £65.99 @ Dabs
Optical Drive Lite-On iHAS124-04 DVD/CD Writer[13] £13.18 @ Scan.co.uk
Operating System Microsoft Windows 8 (OEM) (64-bit)[14] £69.99 @ Dabs

Every time I load a game, the PSU starts to make this rattling / buzzing noise. It increases for higher intensity graphics / games, then my PC shuts down. A video link is attached below:
https://www.dropbox.com/s/emfwgl3vk8uq6e7/2013-12-02%2016.23.56.mp4[15]
It may sound a bit quiet on the video, but it's really really loud. It's not the fan, however, as I can stop it, and the noise is still present. Also, ignore the cabling as I have to keep reinstalling the PSU.
I have a Corsair CX750, and due to the same problem, I RMA'd it, they found a fault and sent me another one. Now, it is making the same noise and shuts down once more.
Is this PSU just not compatible with my build? Or is it another component which may be causing the issue? I've already replaced the graphics card so it definitely isn't that.
Please, please outline your suggestions below.
 

KOKOJUMBO

Honorable
Dec 2, 2013
26
0
10,540
My guess would be that some of your cables arent pluged in propperly. If thats not the case, then your PSU is faulty. Your PC probably shuts down, because the PSU stops giving the components power (because if has a faulty component in it), so you sould probably get a new one.
 

Drummermean

Honorable
Oct 5, 2013
7
0
10,510


Do you think this could be the core problem, though? I know people with an identical system who do not have this problem. Thanks for the response. :)
 


If the noise is coming from the power supply then the problem is inside the power supply unit.

Borrow and try a better quality power supply unit for troubleshooting purposes. If the noise doesn't happen with the better power supply unit then you know where the problem is. If you're unable to borrow a PSU then take it to someone who has the spare parts to diagnose the problem.

Just because you received another same model PSU from the RMA process does not mean that the problem is resolved.