High Southbridge gpu temps

I was trying to check on the temps for the cpu and ended up with HWmonitor. This is not really an overclocked system. I had noticed that the top of the heat sink for the south bridge was fairly hot after some memory test. The Heatsink/fan for the cpu seem to be doing good though. I left the min speed for the cpu fan at the second highest level so the motherboard heat pipe system would get more air, but it doesn't seem to be enough.
Hardware monitor   Fintek F71889F
   Voltage 0   3.30 Volts [0xCE] (+3.3V)
   Voltage 1   1.09 Volts [0x88] (CPU VCORE)
   Voltage 2   4.67 Volts [0x6F] (+5V)
   Voltage 3   12.32 Volts [0x8C] (+12V)
   Voltage 4   1.57 Volts [0x62] (VIN4)
   Voltage 5   0.67 Volts [0x2A] (VIN5)
   Voltage 6   0.42 Volts [0x1A] (VIN6)
   Voltage 7   3.30 Volts [0xCE] (VSB3V)
   Voltage 8   3.12 Volts [0xC3] (VBAT)
   Temperature 0   31°C (87°F) [0x1F] (TMPIN0)
   Temperature 1   92°C (197°F) [0x5C] (TMPIN1)
   Temperature 2   36°C (96°F) [0x24] (TMPIN2)
   Fan 0      2019 RPM [0x2E7] (FANIN0)
   Fan 1      2283 RPM [0x291] (FANIN1)
   Fan 2      1427 RPM [0x41B] (FANIN2)
   Fan PWM 0   88 pc [0xE0] (CPU)
   Fan PWM 1   100 pc [0xFF] (System Fan 1)
   Fan PWM 2   100 pc [0xFF] (System Fan 2)
   Fan PWM 3   100 pc [0xFF] (System Fan 3)
Hardware monitor   AMD Phenom II X4 945
   Temperature 0   25°C (76°F) [0xC4] (Core #0)
   Temperature 1   25°C (76°F) [0xC4] (Core #1)
   Temperature 2   25°C (76°F) [0xC4] (Core #2)
   Temperature 3   25°C (76°F) [0xC4] (Core #3)
Hardware monitor   NVIDIA nForce 980a/780a SLI
   Temperature 0   81°C (177°F) (GPU Core)
Hardware monitor   WDC WD1600JD-22HBB0
   Temperature 0   39°C (102°F) [0x27] (Assembly)
Hardware monitor   WDC WD1600JD-22HBB0
   Temperature 0   43°C (109°F) [0x2B] (Assembly)
I had was thinking about a small fan stuck on top of the center heatsink in the HP system or over the voltage regulators though the hot spot seems to be at the SB.
I was also wondering about the fancy metal plate slid in over the voltage reg HS that advertises 140w ready. Seems it would reduce air flow around the fins though now I'm more concerned about the SB. Don't want that to fry.
Board is in a 4U rack case. I added a 120mm Vantec fan to the front card side of the case to help get air moving on that side. fan is rated 1500RPM 53 CFM
I went into Entropia for about 10-15 minutes and checked back and it reports a peak temp of 117c (242F)

Quote from: Vorg on 10-November-09, 15:30:58
I was told they called it southbridge because the NB is in the cpu. You change CPU-NB to bump up the memory controller speed. The SB is located so that anything higher and it would interfere with cards. If you look at the pictures of the board, the heat sink in the middle of the heat pipe between the slots and the cpu is MCP82 (http://vr-zone.com/articles/nvidia-preparing-mcp82-xe-chipset-for-amd-am3-cpus/6755.html?doc=6755). It has the video. The heat sink at the end of the slots is NF200. That seems to be the SLI bridge. And of corse the heat sink between the back and the cpu are the VR's. Its the NF200 I was putting my finger on to check. But I also tried the MCP. The reason MCP and GPU where going up the same is they are in the same chip just like there are 4 cpu core sensors plus a cpu sensor in one chip and they stay together. From what I am getting of the two remaining sensors, one is power supply and likely the other is ether VR's or the SF200. SF200 would go up because it's tied to the same heatpipe.
I picked up couple of 20mm fans. May put one of those on the MCP heat sink. I would reduce the grease if I knew more what it had now. Don't want to take it off and find I need special pads for the VR's or something.
The NB isn't really in the CPU but the memory controller is (and has been for some time).
You do not likely have an over-abundance of thermal paste so much as hardened and ineffectual thermal paste. You won't need any specialized pads unless there is a significant gap to be closed by design. Heat transferring tape is available. I have read reports of people reducing temps just replacing the MSI thermal goop that has turned into something more like MSI concrete and staying with the factory heat sinks (again, I recommend a non-conductive paste). People have gone crazy about not using too much, often to their detriment. There are situations where "too much" really is "too much" but it's not as common a problem as people say if they're using quality stuff. You have to be more careful if you use conducting material (e.g., silver based) because you don't want to short your board. I recently used "just enough" as a >first ever< experiment in using such a sparse amount and had to remount my CPU HSF with significantly more for a 10C drop. I was able to confirm another poster's observation that AMD heat spreaders can be concave. In any event, the spring tension down on the HSF will squeeze out anything it doesn't need and despite what you read in the papers, this method has worked for me for over 10 of the 20 years I've been building my own.
I still think there is something whacked with what Everest is reporting to you at least in part because there is no CPU diode report, only core reports. You will want to know the temp of your NB, GPU, and CPU independently and confidently. Have you posted to Everest yet?

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