With CPU-Z you can see what I am working with and basing this testing on. This is a 2GB kit and was tested in dual channel mode. For the initial test at 1.9V, the RAM was set to timings of 4-4-4-12 and run at 800MHz. the second round of testing was done at 2.1V and the RAM was overclocked to 1000MHz with timings of 5-5-5-15. Lastly, for the 2.5V testing, the RAM was pushed even farther to 1100MHz with timings of 5-5-5-18, all of which used a 2T command rate. Testing was accomplished by using Memtest 86+, version 2.01, in bootable format.
Each test for all results was run for four complete passes and the temperature was averaged out from the highest reading, which usually occurs during test #6. Tests were done with bare IC's and no fan, then again with a fan on all three settings.
This was also the procedure for testing with the Cuirassiers in place. I used a 120mm, ISGC Fan 12 that I actually set on top of the passive cooler of my 2600XT. This fan supplies 58 CFM as well making it a good lower CFM choice to use. This orientation made the air blow down towards the motherboard for fan testing results. My theory was to replicate a Dominator or OCZ style, aftermarket, memory cooling solution.
These are the testing results for no fan being used to cool the RAM, other than what circulation the NZXT Zero2 comes with stock. As you can see, with no fan being used the Cuirassiers actually retain a bit more heat than if the bare IC's are just exposed to the environment. Not really a big surprise to me, I would assume anything wrapped in a jacket would be a bit warmer under normal conditions.
These are the results for testing done with the fan in place. At 1.9V, again there isn't much difference between bare or with the Cuirassiers. Testing at 2.1V starts to show the Cuirassiers pulling ahead in temperatures ever so slightly. Finally at 2.5V testing, the Cuirassiers pull almost a full degree margin over the bare IC testing. This leads me to believe that with the more heat you produce, the more efficient these coolers are when paired with a capable fan cooling solution.