Today we are going to take a look at the ASUS Pro B660M-C D4-CSM. This is a mATX motherboard designed for the corporate desktop space. Specifically, we are going to get into the motherboard, what CSM is, and then we are going to build it into both a more typical system as well as a much higher-end system with a GPU and over 100TB of storage. Let us get to it.
We also have a video version of this as well. That means we have a lot more in terms of views than we can do in photos and screenshots:
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ASUS Pro B660M-C D4-CSM Motherboard Overview
The Pro B660M-C D4-CSM is a mATX motherboard, so it fits into even medium-sized chassis. It is also very different from many of ASUS’s consumer motherboards, and we are going to attempt to explore why.
The key feature of the motherboard is its LGA1700 socket. We are going to use an Intel Core i5-12500, one of Intel’s mid-range Alder Lake CPUs for the build, but we also used the Core i7-12700F in this motherboard.
You will notice that we have four DIMM slots. Although Alder Lake supports DDR5, it also has support for DDR4 and this platform uses DDR4. While DDR4 does not have the same bandwidth, it is also readily available and much less expensive so it makes sense in a corporate desktop platform.
Something that should be readily apparent is the lack of ornate heatsinks on the VRMs. ASUS has some very fancy designs, but this is much simpler. Most of these systems are going to use Core i3, Core i5, and perhaps some Core i7 CPUs. They are also going to be focused on the 65W TDP segment and lower.
On the bottom of the motherboard, we are going to get to the PCIe slots in a moment, but we have two M.2 PCIe Gen4 x4 slots, a WiFi M.2 slot, and then a bunch of I/O.
ASUS actually keeps positions of many of the internal headers the same between generations to help provide consistent lifecycle operations for IT staff. Upgrading a machine or replacing a motherboard can happen quickly because cables likely do not need to be re-routed.
The PCIe slots are a PCIe Gen4 x16 slot, then two Gen3 x1 slots. While Intel Alder Lake supports PCIe Gen5, it is highly unlikely a desktop will use Gen5 speeds in the near term, so ASUS removes that feature to optimize costs.
In front of the four SATA III 6.0gbps ports, we see the Intel B660 PCH. This has a much smaller heatsink than we see on many consumer platforms.
For the rear I/O, we get dedicated PS/2 keyboard and mouse ports. We get four display outputs including two DisplayPorts, one HDMI port, and a VGA port. There are two USB 2.0 and two USB 3 Type-A ports. We do wish there was a rear Type-C port here.
Networking is provided by an Intel i219 chipset NIC so it is 1GbE. We wish that there was 2.5GbE and WiFi on board just to make installation that much faster and give a bit more future-proofing. Audio on the rear is a three jack setup, and combined with front audio, this is more than ample for most office work.
One item that would have been nice is a fixed I/O shield. This saves a bit of time on each motherboard install, so it would have been nice to have here.
Next, let us get into what comes along with CSM aside from just the motherboard itself.