Its a self build thats about 6months old, and this is the first trouble iv had with it.
Main CPU heatsink is nice and cool to the touch, but the heatsink iv put a ring around in the photo is HOT!!!! like owch HOT!!!
And to make matters worse, due to the board layout it has a oversized NVIDIA GeForce GTX 260 Black ed card right next to it spewing heat! :-/
Iv found a 100mm fan and have put that in the case next to the HOT heat sink and im getting a tem reading of:
Field Value
Sensor Properties
Sensor Type Winbond W83627EHF/EHG (ISA 290h)
GPU Sensor Type Analog Devices ADT7473 (NV-I2C 2Eh)
Motherboard Name ASRock K10N78
Chassis Intrusion Detected Yes
Temperatures
Motherboard 26 °C (79 °F)
CPU 40 °C (104 °F)
CPU #1 / Core #1 34 °C (93 °F)
CPU #1 / Core #2 34 °C (93 °F)
CPU #1 / Core #3 34 °C (93 °F)
CPU #1 / Core #4 34 °C (93 °F)
MCP 44 °C (111 °F)
down from MCP 87 °C (189 °F) 
Aux 40 °C (104 °F)
GPU 47 °C (117 °F)
GPU Memory 39 °C (102 °F)
GPU Ambient 37 °C (99 °F)
WDC WD1600SD-01KCC0 26 °C (79 °F)
can i get a fan to fit that heatsink....so i dont have to have my case open and a silly big fan there all the time?