Question 1

Does this board work with single CPU?

Accepted Answer

Yes it does - actually i always test the dual socket boards with just one CPU and one stick of RAM, much easier this way. When that works i add the second CPU and installing the remaining memory. So yes - i can confirm that the C621E works with the single Xeon Platinum.

Question 2

I've put together the system (two 6148 cpus and 12 LRDIMM sticks 64GB), however my first power up the motherboard kept power cycling. I took out the Cmos battery to reset Cmos, and then put the battery back in. Now , it powers up and then immediately powers down. clicking the power button does nothing. removing the power cable and putting that back, the MB does the same thing. 
any thoughts ? should I try reseating the CPUs?

Accepted Answer

I find this board quite stable. I have not, however, used it with LR-DIMMs. There is only a single (Crucial) LR-DIMM listed in the AVL for this board. I'd start with one CPU and RDIMM(s) and see if that works.

Question 3

Why do you say "Designed for Dual 7th generation LGA2066 socket Intel Xeon W-Series processors" in "Features" in your specifications and also say the CPU socket is LGA3624?  Are these actually the same socket?

Accepted Answer

The WS C621E SAGE is an LGA3647 based motherboard. Newegg's "Features" section seems to erroneously include details about another board that is based on LGA2066. LGA2066 and LGA3647 are not the same.

Question 4

When powering on, how long does this motherboard take to boot to POST?

Accepted Answer

This is correct  sometimes it feels longer but 30 sec and 1 beep is average.  I was using an external GPU so it might have taken longer then using  VGA

Question 5

The specs sheet state another LGA socket vs the listed LGA 3647 above. Just verifying this is a typo or the spec sheet is wrong?

Accepted Answer

The correct CPU socket type for the ASUS WS C621E Sage EEB Server Motherboard is Dual LGA 3647, as stated in the product description and product specifications.

Question 6

Will it work with the Intel Xeon W-3175X ?

Accepted Answer

Yes, it will work with Intel Xeon W-3175X as it supports Intel Xeon Scalable Processors Family.

Question 7

Will this fit on a ATX Tower? If not, what form factor case will this fit?

Accepted Answer

As mounted in  a tower, the board is 13"  front to back of a tower, 12" top to bottom, so the smallest case that will fit it is EATX.  Technically it is SSI-CEB, same size as the largest EATX.  So this board will take  all the space in a big case like Fractal XL-R2 which I used.  The flat motherboard space in most ATX cases  is  at most 12" back to front. Will need a big case - XL-R2, Phantek Enthoo Pro, or Corsair Obsidian 750, and have to play around with the cables to run around the motherboard space or any over-under  grommets in the motherboard area.

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