I am curious about the motherboard and the cpu in the 1U and 1U+ servers. I have the 3U server which has a slightly modified* version of Commell LV-672
Nope, totally missed the plus in the request.
motherboard and an Intel Celeron D cpu (90nm single core with 84W tdp). There is a revised (65nm) version of the same family Intel Celeron D cpu with higher clock speed and 65W tdp. I wonder if the newer 1U+ servers use a newer and more efficient cpu. The bulk of the power consumption in the 3U server comes from the large number of HDDs (6.5W typical / 8W max per each 6TB) but the CPU is generating the bulk of the heat. The static pressure fans in the rear exhausts run at 4000rpm and very loud. The power supply is nothing special. 80 Plus Gold certified which means %82 efficiency. One could consider a Platinum certified psu with %94 efficiency but it would take 2 years for the more efficient psu to pay it self off with %12 efficiency difference. This is with the California utility rates. It would take many more years in other markets where power is cheaper.
*Most of the I/O sockets and 1 of 2 ethernet controller chipsets are desolder/removed.