BSOD when playing MMO

For the last few months I have been getting BSOD while playing MMO's. Usualy I just get dropped from the game or freeze up and can only reboot(cannot bring up task mgr) but every so often I get the blue screen. It does not give me consistent reasons eg: Machine_check_Exception, Uncorrectable hardware error etc.

I have no problem with single player games, youtube, etc, and can often play for a few hours without a game crash but once I get one, more follow.

I have had it in and tested, all systems were reported as good. S.M.A.R.T. says all is well. I replaced my WD hard drive witg a 2TB Seagate and put in a new GTX 750 Ti graphics card.
Any help would be greatly appreciated.

Hiya and welcome to SevenForums!

Code:

BugCheck 124, {0, fffffa8007b4d028, b2000000, 70150}

Probably caused by : GenuineIntel

Code:

BugCheck 9C, {0, fffff880009f5b70, 0, 0}

Probably caused by : intelppm.sys ( intelppm!MWaitIdle+19 )

This is your CPU. Run Prime95, if the temps goes too high stop the test. Hardware - Stress Test With Prime95

I was surprised at how much information is generated by the Log collector. I tried to 'read' it, but don't really know what to look for and was honestly rather intimidated by it.
I will run the stress test this weekend when I can keep a close eye on it.
Thank-you for taking the time to help.

Hehe, you need a little experience to understand.

It's no problem, it's my duty to help.