I finally removed the heatsink from a Nvidia Tesla M2090. This GPGPU has 512 processors versus the C2075 that has 448. Unfortunately the M2090 does not have active cooling as it is intended for server in a rack. Apparently Rack mounted servers for high performance computing have air flow that flows thru the heat sink fins of these cards. The 3 pics below show the C2075, the bare M2090, & the M2090 /w heatsink. The red outlines on the M2090 card are the addition parts that had thermal compound to the heatsink ... as well as the memory chips around the main chip. There are an equal number of memory chips on the back of the card in the same locations as those on the front. These parts are not coupled to the heatpipe heatsink tho but just on the heatspreader. What I would like to find or workout is an active cooling solution preferably water. The C2070 that I have idles at ~80 deg C! Or, it did until I found the MSI Afterburner utility that allows a custom fan v temperature speed control curve. I am pretty certain that even if I found the equivalent cooling h/w that the C2075 has, all the necessary electronics for temp control or even the fan electrical header is not on the board.