You Might try the C/P paper for trouble shooting
I thought this was an Interesting breakout of the numbers Delta' between compounds on the Water Cooling shrink considerably about 2C on the MX2 and MX3 and 2.75C on the MX4.
The only one cooler that bucked the trend was the Corsair and perhaps the EK block with better mounting schemes.
Below is a data sort of the test results The blue bars are air cooling all others are water cooling.
The Corsair results are marked in green and follow the usual distribution
