3 different BSOD when playing a game, also beepcode in POST

[resa]

Hello,

yesterday my PC suddenly crashed (without BSOD) while I was in a game, tried to restart, failed, giving me 4 short beeps instead.

When I retried it started without a problem. Everything in Windows seemed to be working fine and after a while I started another game. After maybe 15 minutes I got the first BSOD with the following code:

Stop: 0x0000001E
(0xFFFFFFFFC000001D,
0xFFFFF80002E76F7F,
0x0000000000000000,
0xFFFFFA8007BBAB00)

I have no minidump for that crash unfortunately. Only a 500mb big dump.

Since then I have tried a few things like Seatools and Memtest for 3 passes without finding an error. As long as I just use Windows there are no crashes. Whenever I start a game though I can induce a crash within approx. 15 minutes. The second BSOD was "Bad_Pool_Header", the third "PFN_List_Corrupt". For both later crashes I have a minidump. After the second crash I also got the beepcode again but it resolved after a restart.

The PC is 2 years old, so far I never had any problems and the hardware has not changed a bit in those 2 years. The specs are in my profile.

I would really appreciate any help. No idea what to do right now...

 

[resa]

Another issue just cropped up: I had put the PC into "energy save mode" to get something to eat and when I came back it seemed to wake up, fans spinning, but nothing displayed on the monitor. After about 2 minutes the system just shut down. When I tried to restart the fans started spinning again but without anything displayed on the monitor. After a second restart everything worked again and my session from before "energy save mode" was even restored. No idea if this is related to the beepcode and the BSODs, but something seems to be going pretty wrong with my system. Thanks in advance for any kind of help!

 

[resa]

After a fourth BSOD yesterday evening I've decided to start with just wiping my system and making a clean new install.
Right now I have only important updates installed, Security Essentials, NVidia Drivers and a browser.
Should I install games since the BSODs occurred while gaming or does it make sense to keep installations to a minimum for now?
Any advice on how I should proceed?