TOP FAN EXPERIMENTATION
Here are some initial measurements regarding the impact a top fan has in this build. Initially, I tried using a stock CoolerMaster 200mm fan, but it is 30mm high and didn't clear the top of both Artic Freezer i30 heat pipes. I decided to complete the build without a top fan, then measure the temperatures of both Xeon CPUs. Thereafter, I mounted a thinner (20mm) BitFenix Spectre 200mm case fan on top, and I was happy to see that it does clear both heat pipes:
The Xeon E5-2670 processor has an 100C Tj maximum operating temperature limit when pegged at 115W. The Artic Silver 5 thermal compound takes a while to cure, so I'm expecting the following initial temperature readings to drop a bit over the next few days during burn-in.
Idle Performance - No Top Fan
- CPU1 Average Core Temperature 32C
- CPU2 Average Core Temperature 34C
Idle Performance - BitFenix Top Fan
- CPU1 Average Core Temperature 30C
- CPU2 Average Core Temperature 32C
Prospects for amazing cooling performance look promising. Average core temperatures are simply fantastic at idle with the top fan in place, 68C below Tj Max. Using the BitFenix case fan dropped idle temperatures 2C or about 6%. The fan is extremely quiet mainly because it spins at 700 RPM. I will take this modest temperature improvement at idle. All of the other case fans are Noctua PWM hardware, controlled by the ASUS motherboard's BIOS. All the fans are spinning between 600 and 800 RPM at idle.
Amazingly, the KingWin power supply fan is not spinning at idle, so there is zero PSU noise. It will be interesting to see at what load factor the PSU decides to spin up its fan. Thanks to the CoolerMaster case design and some wonderful Noctua PWM fan hardware, the end result is a server platform that is silent at idle-- at least until the K5000 is installed later today.
I'm looking forward to future measurements at higher/hotter loads...
Note: Only two of the four BitFenix fan mountings align with the case top holes, but using two Nexus silicon fan mounts has nevertheless kept the fan very stable:
Edited by SonicAgamemnon - 4/20/13 at 5:54am