ASRock Rack Micro-ATX AM4 Server Motherboard or ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard? Which ASRock Rack Model to Buy
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We compare the asrock rack x570d4u 2l2t socket am4 amd vs b650d4u 2l2t bcm micro atx. Both are Micro-ATX server motherboards from ASRock Rack. They share a compact build and four DIMM slots for memory. The main difference lies in their platform generation. The first model uses the older AM4 socket and DDR4 memory. The second model supports newer Ryzen 7000 processors with DDR5 and PCIe 5.0. You should choose based on your processor and memory requirements.
Key differences
| Aspect | ASRock Rack Micro-ATX AM4 Server Motherboard | ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard |
|---|---|---|
| CPU Socket | AM4 PGA 1331 | LGA 1718 |
| Chipset | AMD X570 | B650E |
| Memory Type | DDR4 | DDR5 ECC/non-ECC UDIMM |
| PCIe Version | not listed | PCIe 5.0 |
| Processor Support | 3rd and 2nd Gen AMD Ryzen | AMD Ryzen 7000 series |
Which one should you choose?
Choose ASRock Rack Micro-ATX AM4 Server Motherboard if
- You need a server motherboard that supports 2nd or 3rd Gen AMD Ryzen processors with Radeon Graphics.
- You prefer DDR4 memory modules, which are often more cost-effective for existing systems.
- You are building a system using the AMD X570 chipset platform.
Choose ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard if
- You require support for the latest AMD Ryzen 7000 series processors.
- You need DDR5 memory for higher bandwidth and modern server workloads.
- You want access to PCIe 5.0 lanes for faster storage or expansion cards.
Verdict: The ASRock Rack X570D4U-2L2T suits users who need established AM4 platform stability with DDR4 memory. The ASRock Rack B650D4U-2L2T is the better choice for those requiring modern Ryzen 7000 processors and DDR5 speeds. Select the model that matches your specific processor and memory generation needs.
AM4 X570 vs Ryzen 7000 B650E
CPU socket
The ASRock Rack X570D4U-2L2T uses the AM4 PGA 1331 socket. It supports 3rd Gen and 2nd Gen AMD Ryzen processors with Radeon Graphics. This is a well-established platform for older server workloads. The ASRock Rack B650D4U-2L2T/BCM uses the LGA 1718 socket. It is designed specifically for AMD Ryzen 7000 series processors. This newer socket offers a different physical layout and pin configuration. You must match your processor to the correct socket type. The AM4 option suits existing 2nd and 3rd Gen Ryzen CPUs. The LGA 1718 option requires a Ryzen 7000 series chip. The socket type dictates which CPU generation you can use.
Memory type
Memory standards differ significantly between these two motherboards. The X570D4U-2L2T supports DDR4 memory. It provides four DIMM slots with two slots per channel. This allows for standard DDR4 ECC or non-ECC modules. The B650D4U-2L2T/BCM supports DDR5 memory. It also has four DIMM slots with two slots per channel. It explicitly supports DDR5 ECC and non-ECC UDIMM modules. DDR5 offers higher bandwidth and efficiency compared to DDR4. If you need the latest memory speeds, the B650 model is the choice. If you have existing DDR4 RAM, the X570 model is compatible. The memory type affects your total system cost and performance ceiling.
Chipset
The chipset determines the underlying platform capabilities. The ASRock Rack X570D4U-2L2T is built on the AMD X570 chipset. This is a high-end chipset for the AM4 platform. It supports PCIe 4.0 lanes for connected devices. The ASRock Rack B650D4U-2L2T/BCM uses the B650E chipset. This is a newer chipset for the AM5 platform. It supports PCIe 5.0 standards for greater bandwidth. The B650E chipset is designed for modern server requirements. It offers improved I/O capabilities compared to the older X570. The X570 is reliable for established workflows. The B650E provides a path for future expansion. The newer chipset generally offers better long-term viability for new builds.
PCIe version
Expansion slot speeds are critical for server performance. The X570D4U-2L2T relies on PCIe 4.0 standards for its expansion slots. This is sufficient for many current storage and network devices. The B650D4U-2L2T/BCM supports PCIe 5.0. It includes one PCIe 5.0 x16 slot and one PCIe 5.0 x4 slot. It also has one PCIe 4.0 x1 slot. The B650 model also supports one M.2 slot running on PCIe 5.0 x4. This allows for significantly faster data transfer rates with compatible NVMe drives. The X570 model is limited to PCIe 4.0 speeds. If you plan to use the fastest available storage or accelerators, the B650 model provides the necessary bandwidth.
Form factor
Both motherboards share the Micro-ATX form factor. However, their physical dimensions vary. The X570D4U-2L2T measures 11.9 inches in length, 11.1 inches in width, and 2.76 inches in height. It weighs 2.2 pounds. The B650D4U-2L2T/BCM measures 9.6 inches in length and 9.6 inches in width. It is 1 inch in height. The weight for the B650 model is not listed. The B650 model is slightly more compact in length and width. It is also thinner. The X570 model is larger and heavier. The B650 dimensions fit well in smaller server chassis. The X570 dimensions may require a larger case. Check your case specifications before choosing based on size alone.
Choose based on platform generation
You need older AM4 Ryzen processors
This model uses the AM4 socket and X570 chipset. It supports 2nd and 3rd Gen AMD Ryzen processors. You should choose this if your existing CPU inventory consists of these older generations. The 105W power design fits standard server requirements for established workloads without requiring new hardware investments.
You want DDR5 and PCIe 5.0
This board features the B650E chipset and LGA 1718 socket. It supports DDR5 ECC and non-ECC memory. You get PCIe 5.0 lanes for faster data transfer. It also includes a PCIe 5.0 M.2 slot. Choose this if you need the latest Ryzen 7000 series performance and modern I/O standards.
You prefer a smaller footprint
The B650E model measures 9.6 by 9.6 inches. The X570 model is larger at 11.9 by 11.1 inches. If your server chassis has tight space constraints, the smaller board fits better. Both are Micro-ATX, but the newer model saves physical space in compact enclosures.
The products compared
ASRock Rack Micro-ATX AM4 Server Motherboard
Best for: Existing AM4 server deployments
- CPU Socket
- AM4
- Chipset
- AMD X570
- Form Factor
- Micro-ATX
- Memory Type
- DDR4
- Use Case
- Server
- Dimensions
- 11.9 × 11.1 × 2.76 inches
View on Amazon: ASRock Rack Micro-ATX AM4 Server Motherboard Affiliate link
This ASRock Rack X570D4U-2L2T is a Micro-ATX server motherboard built for AMD AM4 processors. It uses the AMD X570 chipset and supports DDR4 memory across four DIMM slots. The board handles 3rd and 2nd Gen Ryzen CPUs with a 105W power design. You will find its 11.9 by 11.1 inch footprint fits compact server cases. It suits users needing reliable server infrastructure with established AMD platform specs.
Pros
- Supports 3rd and 2nd Gen AMD Ryzen processors
- Four DDR4 DIMM slots for memory expansion
- AMD X570 chipset for server stability
- Compact Micro-ATX form factor
Cons
- Uses older DDR4 memory instead of DDR5
- Limited to AM4 socket generation
- Smaller expansion capacity than ATX boards
Good fit if
- You need a server board for existing AM4 CPUs
- You prefer DDR4 memory for cost efficiency
- You require a compact Micro-ATX chassis
Skip if
- You want the latest DDR5 memory support
- You plan to use Ryzen 7000 series CPUs
- You need extensive PCIe expansion slots
Verdict: ASRock Rack X570D4U Server Board is a solid choice for users maintaining AM4-based server infrastructure. It delivers stable performance for legacy Ryzen processors without requiring new memory types.
ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard
Best for: Ryzen 7000 server builds needing 10 GbE
- CPU Socket
- LGA 1718
- Chipset
- B650E
- Form Factor
- Micro-ATX
- Memory Type
- DDR5
- PCIe Version
- PCIe 5.0
- M.2 Slots
- 1
View on Amazon: ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard Affiliate link
The ASRock Rack B650D4U-2L2T/BCM is a Micro-ATX server motherboard built for AMD Ryzen 7000 series processors. It features a B650E chipset and supports DDR5 ECC or non-ECC memory across four DIMM slots. You get PCIe 5.0 connectivity for both the primary x16 slot and an M.2 drive. The board includes 10 GbE networking, making it suitable for high-performance server tasks requiring modern CPU architecture and fast data transfer speeds.
Pros
- Supports AMD Ryzen 7000 series processors via LGA 1718 socket
- Features PCIe 5.0 x16 slot and PCIe 5.0 M.2 support
- Includes 10 GbE Ethernet for high-speed networking
- Handles DDR5 ECC and non-ECC UDIMM memory
Cons
- Only one M.2 slot limits storage expansion options
- Micro-ATX form factor restricts total expansion slots
- Single PCIe 5.0 x4 slot available for additional peripherals
Good fit if
- You need a server board for Ryzen 7000 CPUs
- You require 10 GbE networking capabilities
- You want PCIe 5.0 support for modern components
Skip if
- You plan to use DDR4 memory modules
- You need multiple M.2 drives for storage
- You require a larger ATX expansion chassis
Verdict: The ASRock Rack B650D4U Micro-ATX Server Board is a compact, modern server solution for users prioritizing Ryzen 7000 performance and 10 GbE connectivity. It suits those who need PCIe 5.0 speeds but can work with limited M.2 expansion.
Specifications side by side
| Spec | ASRock Rack Micro-ATX AM4 Server Motherboard | ASRock Rack Micro-ATX AMD Ryzen 7000 Server Motherboard |
|---|---|---|
| CPU Socket | AM4 | LGA 1718 |
| Chipset | AMD X570 | B650E |
| Form Factor | Micro-ATX | Micro-ATX |
| Memory Type | DDR4 | DDR5 |
| PCIe Version | not stated | PCIe 5.0 |
| M.2 Slots | not stated | 1 |
| Ethernet Speed | not stated | 10 GbE |
| Use Case | Server | Server |
| Dimensions | 11.9 × 11.1 × 2.76 inches | 9.6 × 9.6 × 1 inches |
| Weight | 2.2 pounds | not stated |
| Model | X570D4U-2L2T | B650D4U-2L2T/BCM |
Frequently asked questions
Does the ASRock Rack B650D4U support DDR4 memory?
No. The B650D4U-2L2T/BCM is designed for the newer Ryzen 7000 platform. You must use DDR5 memory with this motherboard. The older X570D4U-2L2T model supports DDR4. This distinction is critical for your memory procurement. Do not buy DDR4 sticks for the B650D4U.
Is the ASRock Rack B650D4U smaller than the X570D4U?
Yes. The B650D4U-2L2T/BCM measures 9.6 inches by 9.6 inches. The X570D4U-2L2T is larger at 11.1 inches by 11.9 inches. Both fit the Micro-ATX form factor. The B650D4U offers a more compact footprint for tight server chassis. Check your case dimensions before choosing.
Can I use PCIe 5.0 devices on the ASRock Rack B650D4U?
Yes. The B650D4U-2L2T/BCM supports PCIe 5.0. This allows for faster data transfer speeds with compatible components. The older X570D4U-2L2T does not list PCIe 5.0 support. If you need the latest expansion speeds, the B650D4U is the correct choice for your server build.
Which motherboard is better for legacy Ryzen processors?
The ASRock Rack X570D4U-2L2T. It uses the AM4 socket. This supports 2nd and 3rd Gen AMD Ryzen processors. The B650D4U uses a newer socket for Ryzen 7000. If you have existing AM4 CPUs, the X570D4U is the compatible option. It ensures stable performance for older server workloads.
What is the weight difference between these two boards?
The X570D4U-2L2T weighs 2.2 pounds. The B650D4U-2L2T/BCM weight is not listed in the specifications. Both are Micro-ATX server boards. The X570D4U is slightly larger in dimensions. The B650D4U is more compact. Consider chassis weight limits when selecting your platform.
Does the ASRock Rack X570D4U have 10 GbE connectivity?
The product data does not specify network speeds for the X570D4U-2L2T. The B650D4U-2L2T/BCM is noted for 10 GbE connectivity. If high-speed networking is a priority, the B650D4U is highlighted for this feature. Verify network requirements before purchasing the older X570 model.
Are both motherboards suitable for server deployments?
Yes. Both are designed for server use cases. The X570D4U is ideal for existing AM4 server infrastructure. The B650D4U suits modern Ryzen 7000 server builds. Both offer four DIMM slots for memory. They provide stable performance for their respective processor generations.