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Quest for the Temperature sensor on a ASRock 870 Extreme3

post #1 of 2
Thread Starter 
Hope this helps other owners in the endless quest to cooler computing...

This started by me wanted lower the stress on my MOSFET, Northbridge, and Southbridge. It became a search for the temp sensor on mobo. I use Speedfan to monitor my temperatures. One of the sensors, System, was the one I wanted to lower. I figured it was connected to one of these three point – or – was an average of 2 or 3 of them. So, I started testing.


Using a old 130 CFM fan, some hose from a hardware store, I fashioned this device...

beast1.jpg

I installed it in the three 5.25 open bays on my HAF 912.
Beast2.jpg

After using Speedfan to monitor and repositioning the hoses to change the air flow, I finally found the location of the temperature sensor. It surprised me, because its location and readings take no account of the MOSFET or Northbridge.

spdfn1a.jpg

The red zone is as localized as I could get for the sensor.

870-temp.jpg

What's important: No amount of cooling to the MOSFET or Northbridge changes the temperature. So if your interested in lower temperatures for either of them, you have no way of monitoring it on this motherboard.

Cheers,

Jyk
Jerry-Rigged
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II 555 BE 3.8ghz ASRock 870 Extreme 3 MSI N450GTS-M2D1GD5/OC G Skill 4 GB DDR3-1333 
Hard DriveMonitorPowerCase
Seagate 500 GB, 7200 Compaq WF1907 [19" LCD] antec neo eco 520c Cooler Master HAF 912 
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Jerry-Rigged
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II 555 BE 3.8ghz ASRock 870 Extreme 3 MSI N450GTS-M2D1GD5/OC G Skill 4 GB DDR3-1333 
Hard DriveMonitorPowerCase
Seagate 500 GB, 7200 Compaq WF1907 [19" LCD] antec neo eco 520c Cooler Master HAF 912 
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Reply
post #2 of 2
Small thing however - SYSTEM temps are usually meant to monitor case temperatures.
    
CPUMotherboardGraphicsRAM
Xeon w3680 Gigabyte X58A-UD3R GTX 295 Engineering Samples 2X Corsair XMS3 
Hard DriveHard DriveCoolingOS
Sandisk SSD Seagate Corsair H50 W7 Ult 
MonitorMonitorKeyboardCase
Viewsonic VA1912wb Viewsonic VA912b K350 CM HAF 
Mouse
Logitech M570 
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Reply
    
CPUMotherboardGraphicsRAM
Xeon w3680 Gigabyte X58A-UD3R GTX 295 Engineering Samples 2X Corsair XMS3 
Hard DriveHard DriveCoolingOS
Sandisk SSD Seagate Corsair H50 W7 Ult 
MonitorMonitorKeyboardCase
Viewsonic VA1912wb Viewsonic VA912b K350 CM HAF 
Mouse
Logitech M570 
  hide details  
Reply
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