I also get 128C on my northbridge. But I also touch both heatsinks and I can't keep my finger on it for very long. Its very hot. Also my internet cuts in and out. I feel that this is a bad motherboard and all Asus M5A97 models have this issue or it's the FX-83XX series that do this. I had a FX-8120 and my n/s bridges never got that hot. Any ideas. Thoughts? Im trying a gigabyte GA-970A-D3P and if that does the same thing then I know its the CPU.