Project Supermicro 846 Part 4 - Transplanting Hardware
Posted Mar 20, 2020, 7:37 PM UTC
258
Nice install !
How much did you pay for the supermicro case ?
1
$260 shipped from theserverstore.com
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Thanks !
Seeing you mod it with consumer hardware gave me some ideas ;)
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We have finally got to the end of this project! Today is relatively simple, as we're just swapping over the motherboard and hard drives to the new case. The only two changes are removing the SAS expander card since the 846 backplane already has an expander built in, and re-purposing a 120mm noctua redux fan I had over the PCIE slots to do duty as CPU cooler fan.
By combining all 3 120mm fans on the fan wall into one fan header on the motherboard, I can easily set up fan throttling using unRAID's Dynamix auto fan control. This controls fan speed based on hard drive temperature, not by CPU temperature. The only drawback to using that plugin is it only works on a single header. The two back exhaust fans are tied to the CPU temperature and controlled through the BIOS.
After the full swap over, I have been able to compare idle power consumption with the cpu running at less then 5% load, and all hard drives spun down. On the old rosewill setup, it would hover around 60 watts. On the newer supermicro setup, it hovers around 70 watts. Even though the power supply in the supermicro is a platinum rated power supply versus the gold rated rosewill power supply, the supermicro is rated for 920 watts while the rosewill was only at 550 watts. This means that the supermicro has a bigger gap in wattage before it hits it's highest efficiency percentage.
One other note regarding the backplane, for the BPN-SAS2-EL1 backplane, when using sata drives, the power indicators do not function, but activity LED's still work. On SAS drives, both work. This is programmed in the backplane firmware and a choice that supermicro made when designing this backplane. As for the better bandwidth of using 8 SAS lanes vs only 4 with this backplane, I can not comment yet as I need another 4 or 5 hard drives before I even get close to saturating a 4 lane SAS connection. When that time comes I'm sure I'll make another video about that subject.
Fan walls on bios and setups on kittens ♪
Auto fan controls and warm woolen mittens ♪
Power indicators tied up with strings ♪
These are a few of my favorite things! ♪
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