Random crash W7 Ult 64bit no BSOD

FIXED: Connection cable wasn't properly attached anymore

hi everyone,

A couple of weeks ago i have bought a Nvidia 570gtx grafics card together with an extra 4Gb of RAM. At that point i decided to finaly upgrade my Windows Vista to Windows 7 Ultimate 64bit. Since that day i started to get a BSOD like once a day. The BSOD probably had to due with the Nvidia drivers, cause since the new ones came out i haven't had a BSOD for over a week now. But since a couple of days my system just crashes without a BSOD.
What happens:
I'm playing a game or watching a movie, then suddenly my screen and sounds just freezes and after about 5 seconds my screen goes black and i hear the little beep your pc makes when it starts, resulting in a restart of my system. Then Windows gives me the start normaly, safe mode, safe mode and network options...

I have to mention that since adding my new GPU i get a CPU-FAN error on startup, but i have checked it and the cable is correctly installed. I have also tried monitoring my temps of the computer troughout gaming and normal use and it seems pretty low.
For my CPU i'm using a closed circuit water cooling. I have the cooler that is attached on the radiator connected to my CPU-FAN on the motherboard. I also have a second fan attached to the other side of the radiator.

I think my new GPU is causing these crashes.
I have attached a zip file with the BSOD Dump & System File Collection, System Health Report and DxDiag.

I'm folowing IT at school but i'm not an expert, so if you need more information feel free to ask but i might need some help getting it.

Thanks in advance,
Zero

Hi.

CPU Hardware error.

You have Stop 0x124 -what it means and what to try.

""For my CPU i'm using a closed circuit water cooling. I have the cooler that is attached on the radiator connected to my CPU-FAN on the motherboard. I also have a second fan attached to the other side of the radiator."" Tip: Check again your hardware.

Then Stress\Test cpu with Hardware - Stress Test With Prime95

The minidump analysis points to cpu hardware error Stop 0x124


If you like details in your work (and this is good) check all hardwares slots,wires,connections,everything then stress\test\check,

Cpu with Prime95


Ram with memtest86


Gpu with OCCT


Check temperatures with Speccy

Good news :)

To ensure that everything is working fine,work\play as usual,give it time (1-2 days maybe) and post back.