Power Supply not enough?

[wizphil]

Thanks to Black Friday, I managed to put together a system, but recently I've found that my computer just suddenly loses display. I had this problem a while back with my old system, thought PSU wasn't enough and turns out I was right. It mostly happens right when I open either a YouTube video or start a game. Last time I had this display problem it happened during Windows Index Rating and when I looked at certain areas in games (I'd assume the more "intense" areas). Before I had a computer with a stronger PSU available, now I do not. So I have no way of testing if it indeed is the power supply. It would be much appreciated if someone could tell me why I'm just suddenly losing display.
(I wish I could give more on the problem, can't connect to my computer or re-establish the display without restarting)

My build:
Power Supply - Corsair CX 500W - www.newegg.com/Product/Product.aspx?Item=N82E16817139027
CPU - AMD FX-8120 - www.newegg.com/Product/Product.aspx?Item=N82E16819103961
Motherboard - MSI 970A-G46 - www.newegg.com/Product/Product.aspx?Item=N82E16813130637
GPU - Galaxy GTX 460 768MB - www.newegg.com/Product/Product.aspx?Item=N82E16814162058
Memory - G. Skills 1866 DDR3 8gb (2x4gb) - www.newegg.com/Product/Product.aspx?Item=N82E16820231460

SSD - OCZ Synapse Cache - www.newegg.com/Product/Product.aspx?Item=N82E16820227932 (Don't think this would be the problem..)
HDD - Seagate 3Tb - www.newegg.com/Product/Product.aspx?Item=N82E16822148844

And the case (Corsair 550D - www.newegg.com/Product/Product.aspx?Item=N82E16811139012) comes with 3 fans and I'm currently using two of them (I got a connector to give power to the third one, but after that this problem started happening, I unplugged the third one but I still experience the display crashes just as frequent).

Thank you for your help!

Edit: Using this CPU HSF - Arctic Freezer 7 - www.newegg.com/Product/Product.aspx?Item=N82E16835186134

 

[lunyone]

Well it's possible that your GPU has some issues or possibly your mobo, but I would suspect that your GPU is possibly at fault. Is this GPU common to both builds?

 

[wizphil]

Well it's possible that your GPU has some issues or possibly your mobo, but I would suspect that your GPU is possibly at fault. Is this GPU common to both builds?

Yea it is

 

[lunyone]

So if you just use desktop applications and not anything video specific, your system is fine?

 

[wizphil]

Mhm. And it never even started happening until I added another fan.. Took out the fan and it continued. This is all through cables in the back of the case, so I didn't touch anything

 

[lunyone]

So let me get this straight:

New Build has:
* New CPU, Mobo, RAM, SSD & PSU

Brought over to new build:
* HD, GPU, & DVD

If this is true than there would be 2 things I would consider possible issues.

* Mobo is flaky and not working right (not stable, especially after adding in case fan)
* GPU is flaky and this is why you have the same issue from previous build, if I understood this correctly.

You might want to run Memtest86 on your RAM sticks and verify that they don't have any issues. Also if you can get Prime95 to run, then I would run it for at least a few hours to see if you have any other issues.

It's also possible that your PSU isn't doing its job, but its unlikely the case since it's a new PSU and is of pretty good quality. This doesn't mean that it's 100% signed off as a good part, but it's something to keep on the list of possible bad parts.

Links:
Memtest86
Prime95