After playing with a few LGA 1366 DP Xeons I decided to keep a mini-log of my thoughts:
Stock Cooler (W series)
Pros
Relatively Quiet
Comes with W series CPUs (note this does not include CPUs intended for multi-socket use such as the E, L and X series CPUs)
Cons
Radial airflow which is suboptimal in a server chassis where air moves from front to back.
130w CPUs under load get quite warm
Wrong mounting for Xeon boards with screw-type back plates
Intel® Thermal Solution STS100C
Pros
4-Pin PWM cooling solution
Reasonably quiet when CPUs are not under load or with low power CPUs
Can use passively (without fan) in ducted chassis with enough airflow
Fits in 2U chassis
Very solid cooling (50C @ 3.4GHz 100% load for 12 hours)
Cons
6000rpm cooling 2x 3.4GHz 32nm hexacores is uncomfortably loud unless sound is isolated
Cost
About $37
Supermicro SNK-P0040AP4
Pros
4-Pin PWM cooling solution
19.5dba cooling
Cons
Will not fit in 3U or smaller chassis
Cost
About $33
Will add more as I get them. I ordered a second set of SNK-P0040AP4's to try with the hexacores to see temperature differences.
Stock Cooler (W series)
Pros
Relatively Quiet
Comes with W series CPUs (note this does not include CPUs intended for multi-socket use such as the E, L and X series CPUs)
Cons
Radial airflow which is suboptimal in a server chassis where air moves from front to back.
130w CPUs under load get quite warm
Wrong mounting for Xeon boards with screw-type back plates
Intel® Thermal Solution STS100C
Pros
4-Pin PWM cooling solution
Reasonably quiet when CPUs are not under load or with low power CPUs
Can use passively (without fan) in ducted chassis with enough airflow
Fits in 2U chassis
Very solid cooling (50C @ 3.4GHz 100% load for 12 hours)
Cons
6000rpm cooling 2x 3.4GHz 32nm hexacores is uncomfortably loud unless sound is isolated
Cost
About $37
Supermicro SNK-P0040AP4
Pros
4-Pin PWM cooling solution
19.5dba cooling
Cons
Will not fit in 3U or smaller chassis
Cost
About $33
Will add more as I get them. I ordered a second set of SNK-P0040AP4's to try with the hexacores to see temperature differences.