GA-970a-d3 Northbridge overheating

[thebluefrog]

Going off of memory since I'm at work:
CPU: AMD FX-8120
RAM: Not sure of models, have 1GB(x2) and 4GB(x2)
Motherboard: GA-970A-D3
Video Card: GTX 260
PSU: not sure of make/model 600w

Not overclocking, system has been running for over a year. I have the settings in to BIOS set to warn when temperature gets too high, currently set at 90c. About a month ago, the temperature buzzing started warning me while playing a game. Checked it out in HWmonitor, TMPIN2 (northbridge) was the one overheating.

I have cleaned the stock thermal compound from the heatsink and reapplied some new thermal compound, and it ran fine without overheating for a few days, then would start overheating whenever I run a game.

I cleaned the heatsink again, and reapplied thermal compound, this time it worked fine for two weeks. I touched the heatsink when it is idling around 70c, and it does get warm, so the heat is transferring to the heatsink. I took the side off of my case and rigged a 120 mm fan to point directly at the heatsink, ran prime95, and it started overheating within a few minutes.

Does anyone have any suggestions?

[autotech]

2 things come to mind use only the 2 x 4 gig sticks see what difference it makes, Try a different PSU. I had a 650 powering a system and after  18 months started getting hot was something to do with PSU i switched out parts and so on till i swithded it and it was solved still ran warm but not hot.

[thebluefrog]

I tried running with just the 4GB x 2 sticks, and still experiencing overheating.

What was it about the PSU that was causing the overheating issue? Was the PSU itself overheating, or causing something else to overheat?

[autotech]

The wattage on that rail was going all over the place. The PSU was 3 years old and i figured at the time to upgrade anyway. I was just trying everything i always have spare CPU, MB, Ram, video card and so on The only thing i didnt have was a spare PSU so go figure it would have to be that.

[Vezina]

Research the forum there are more threads and in one of them i have posted a little print screen from the AMD 9xx chipsets data sheet.,chipset will take 95 Celsius and will protect itself when reaching 115 Celsius .So it really does not matter as long as the system is fully stable. 70 Celsius is just the usual tempt it has on most of the boards.
Make sure you are having proper airflow in the case and let it be.