hwinfo64 vs. Gpu-z, greater reliability in gpu temps?

Hi, recently I felt like my system was overheating (after touching keyboard and feeling extreme heat), so using gpu-z latest version it told me that my system was a high 87-88 degrees celsius peak during 30 minutes of max payne 3. I wanted to try another program and so I used hwinfo64, and from that I got a high of 80-81 degrees (same duration and part in the game). I then cleaned my vents which I noticed were very dusty.

Afterwards in gaming (same part of game and length of time) hwinfo64 reports the max temp at 70-71 degrees celsius and gpu-z 81 celsius (decrease in temps across the board, obviously 70-71 is good level of heat), and I want to know what is or what you all feel is the more reliable or accurate program? Thanks

NOTE: For hwinfo64 I used the latest version and enabled "Compal EC," as I heard it gives better accuracy in temp and fan rpm than the other gpu sensors.

 

theres a couple more temperature monitors in my sig below which you could download just to see the average over 4 bits of software.
im not sure which is the most accurate though.

 

Thanks tried hwmonitor and it gave me temps closer to hwinfo64, but with hwinfo64 the "gpu thermal diode" measurement was close to what gpu-z was, is that accurate or would it be "compal EC" monitor.

 

no idea mate. im not sure which would be the most accurate.
all i know is most people use hw monitor