I figured I'd give it a go and see if the problem might be fixed so I fired up some Marble Arena 2 in Desura and played it for a little bit, and then same problem
-------------------
Mar 28 04:42:04 T kernel: [94085.118038] CPU0: Core temperature above threshold, cpu clock throttled (total events = 242827)
Mar 28 04:42:04 T kernel: [94085.118524] CPU0: Core temperature/speed normal
Mar 28 04:47:04 T kernel: [94385.119355] CPU0: Core temperature above threshold, cpu clock throttled (total events = 324658)
Mar 28 04:47:04 T kernel: [94385.119838] CPU0: Core temperature/speed normal
Mar 28 04:50:50 T kernel: [94610.420071] NVRM: GPU at 0000:04:00.0 has fallen off the bus.
Mar 28 04:50:50 T kernel: [94610.420080] NVRM: GPU at 0000:04:00.0 has fallen off the bus.
-------------------
I figured I'd give it a go and see if the problem might be fixed so I fired up some Marble Arena 2 in Desura and played it for a little bit, and then same problem
-------------------
Mar 28 04:42:04 T kernel: [94085.118038] CPU0: Core temperature above threshold, cpu clock throttled (total events = 242827)
Mar 28 04:42:04 T kernel: [94085.118524] CPU0: Core temperature/speed normal
Mar 28 04:47:04 T kernel: [94385.119355] CPU0: Core temperature above threshold, cpu clock throttled (total events = 324658)
Mar 28 04:47:04 T kernel: [94385.119838] CPU0: Core temperature/speed normal
Mar 28 04:50:50 T kernel: [94610.420071] NVRM: GPU at 0000:04:00.0 has fallen off the bus.
Mar 28 04:50:50 T kernel: [94610.420080] NVRM: GPU at 0000:04:00.0 has fallen off the bus.
-------------------