Following along with our recent reviews of single-socket server/ workstation motherboards using Socket LGA 3647 we have an ASUS Pro WS C621-64L SAGE/10G motherboard to in this review. Fitting 4x PCIe slots, the huge Socket LGA 3647, and 12x DDR4 memory slots is no small feat for a motherboard with the form factor of CEB 12” x 10.9”. The Pro WS C621-64L also has a unique feature: it can handle 64x PCIe 3.0 lanes from the CPU if using an appropriate CPU. ASUS also added a dual-port Intel X550-AT2 10GbE LAN controller. Enterprise users also like to have remote management and this is included with ASMB9-iKVM. This may have seemed like a mountain of specs, in this review, we are going to show what they practically mean and why they are important.
ASUS Pro WS C621-64L SAGE/10G Block Diagram
This may be the first STH review to start with a block diagram. At the same time, it is one of the most important features in the motherboard so we wanted to cover it first.
One will note that the Block Diagram shows two CPU setups. If one uses an Intel W-3200 processor it will have full access to 64 PCIe Gen3 lanes giving full use of PCIe x16 slots for Quad GPU setups. Using standard Intel Xeon Scalable processors may limit PCIe lanes to 48 which may drop some PCIe slots to x8. This is one of the few motherboards that can support the full set of PCIe lanes for the Xeon W-3200 series.
ASUS Pro WS C621-64L SAGE/10G Motherboard Overview
The retail box for the ASUS Pro WS C621-64L SAGE/10G motherboard follows ASUS Workstation motherboard graphics layout.
The retail box back shows a full list of features found on the Pro WS C621-64L SAGE/10G Motherboard.
After taking the motherboard out of the box we get our first look at the Pro WS C621-64L SAGE/10G motherboard with its factor of CEB 12” x 10.9”. This is a slight increase in size to a standard ATX 12” x 9.6” form factor. The socket LGA 3647 and 12x memory slots take up the bulk of the top half of the motherboard with just enough space for power connectors at the edges.
Just above the Socket LGA 3647, we find a heat sink that cools the power circuits. This is connected to the larger heat sink at the left via heat pipes.
To cool the chipset ASUS uses one of its standard chipset heat sinks that has a larger M.2 NVMe SSD heat sink just below.
Removing the M.2 NVMe heat sink we find the M.2 connector and space for up to size 22110 (110mm) SSDs. The M.2 heat sinks screws into the chipset heat sink to help provide better cooling for the M.2 drives.
PCIe slots are arranged as follows
- Slot-7 : PCIe x16 slot (Gen3 x16 link)
- Slot-5 : PCIe x16 slot (Gen3 x16 link)
- Slot-4 : PCIe x16 slot (Gen3 x4 link)
- Slot-3 : PCIe x16 slot (Gen3 x16 link)
- Slot-1 : PCIe x16 slot (Gen3 x16 link)
As we noted in the Block Diagram, If one uses an Intel W-3200 processor it will have full access to 64 PCIe lanes giving full use of four x16 PCIe slots for quad GPU setups. Using standard Intel Xeon Scalable processors may limit PCIe lanes to 48 which may drop some PCIe slots to x8.
At the back of the ASUS Pro WS C621-64L SAGE/10G Motherboard, we find the IO ports which are as follows:
- USB 3.2 Gen 2 Type-A
- USB 3.2 Gen 2 Type-C
- 2x 10G LAN (RJ-45) Ports
- USB BIOS Flashback Button
- 4x USB 3.2 Gen 1 Ports
- Optical S/PDIF Out Port
- Audio I/O Ports
At the right edge of the ASUS Pro WS C621-64L SAGE/10G motherboard, we find the two 8-pin power connectors and we can see the heat pipe that connects both heat sinks.
The retail kit includes a large number of accessories that break down as follows.
- 1x User’s manual
- 10x SATA 6Gb/s cables
- 1x COM port flat cable
- 1x VGA port flat cable
- 1x M.2 Screw Kit
- 1x CPU Carrier
- 1x I/O Shield
- 1x Driver DVD
Before we get on with our testing, let us take a look at the ASUS Pro WS C621-64L SAGE/10G Motherboard BIOS and Software.