Choosing CPUs, motherboards & memory gets complicated when three options are desktop boards on different platform paths and the fourth is a rack-server memory kit. The useful shortcut is to decide the processor and memory direction first, then use features, condition, and listed price to narrow the field. A low board price does not make it interchangeable with a server RDIMM kit, and an Intel DDR4 board is a different route from an AMD AM5 DDR5 build.
Quick take
The desktop choices separate into a stated Intel LGA 1151 DDR4 route, an AMD AM5 DDR5 route, and an AMD AM4 DDR4 route. The HP kit is for named DL360 and DL380 server families rather than a desktop build. Across all four, the listed-price span is $331.96, but the three desktop boards sit much closer together than the server-memory kit.
Start by locking down the platform direction. After that, the AORUS emphasizes Wi-Fi 7 and AMD EXPO, the MSI MAG B550 highlights PCIe 4.0, M.2 storage, and Wi-Fi, while the MSI Z390-A PRO offers M.2 and USB 3.1 within its Intel-focused scope.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| MSI Z390-A PRO motherboard | USD 172.21 | |
| AORUS X870E PRO ICE motherboard | USD 199.99 | |
| MSI MAG B550 Tomahawk MAX WiFi motherboard | USD 167.99 | |
| HP DL360 DL380 128GB memory kit | USD 499.95 |
Decision matrix
- Desktop build centered on 8th- or 9th-generation Intel with DDR4: MSI Z390-A PRO.
- AMD desktop direction using AM5 and DDR5: AORUS X870E PRO ICE.
- AMD desktop direction using AM4 and DDR4: MSI MAG B550 Tomahawk MAX WiFi.
- HP DL360 or DL380 G9/G10 rack-server memory requirement: HP 8x16GB DDR4 ECC kit.
Product notes
NEW MSI Z390-A PRO Motherboard LGA 1151 for 9th/8th Intel ATX M.2 USB 3.1 DDR4
The MSI Z390-A PRO makes sense for a desktop plan that specifically calls for an 8th- or 9th-generation Intel processor and DDR4. Its ATX format, M.2 wording, and USB 3.1 support give it a straightforward feature set for that clearly defined direction. At USD 172.21, it is positioned near the other desktop-board choices rather than the far higher-priced memory kit. Pick this MSI when the Intel-generation requirement is already settled and M.2 plus USB 3.1 are useful priorities. Its limitation is the narrow platform scope: the board is expressly tied to those two Intel generations and DDR4.
AORUS X870E PRO ICE AM5 ATX DDR5 PCIE WIFI 7 AMD EXPO Gaming Motherboard
For an AMD desktop brief that calls out Wi-Fi 7 and AMD EXPO, the AORUS X870E PRO ICE is the most direct match. Alongside its AM5 and DDR5 identity, it lists ATX form factor, M.2 expansion, on-board audio, HDMI, and Ethernet connectivity. The USD 199.99 price is the highest among the desktop boards here, but it remains close to the other two motherboard prices. This is the pick when those named networking and memory-profile features matter to the build plan. The concrete compromise is its listed open-box condition, unlike the two MSI motherboard entries marked new.
MSI MAG B550 Tomahawk MAX WiFi Gaming Motherboard AM4 DDR4 ATX
The MSI MAG B550 Tomahawk MAX WiFi is the desktop-board choice for the AM4 and DDR4 path. It lists support for AMD Ryzen 5000, 5000G, 4000G, and 3000 series processors, plus PCIe 4.0, an M.2 slot with M.2 Shield Frozr, 2.5G LAN, and AMD Wi-Fi 6E. At USD 167.99, it carries the lowest listed price in this comparison. Choose it when those stated AMD processor series and its networking or PCIe 4.0 features align with the planned system. Its boundary is the AM4 DDR4 platform, which is separate from the AM5 DDR5 direction of the AORUS board.
HP DL360 DL380 G9 G10 8x16GB (128GB) PC4-2133P DDR4 ECC Memory Upgrade Kit
The HP kit belongs in a server-memory decision, not a desktop motherboard comparison. It packages eight 16GB DDR4-2133 modules for 128GB total and identifies them as registered ECC RDIMMs for HP DL360, DL380, and related G9/G10 rack-server systems. The USD 499.95 listed price reflects a different kind of purchase from the three boards: a multi-module server-memory configuration. Choose it when the goal is to populate a compatible named rack server with eight 16GB modules. The key limitation is explicit: this registered ECC server memory will not work in consumer desktops, and it cannot be added where LRDIMM modules are already installed.
Final recommendation by use case
For a desktop build, let the platform choice lead: the Z390-A PRO is the Intel DDR4 route, the AORUS is the AM5 DDR5 route, and the MAG B550 is the AM4 DDR4 route. Within those paths, favor the AORUS for its named Wi-Fi 7 and AMD EXPO features, or the B550 for its listed PCIe 4.0, M.2, and Wi-Fi 6E package. Keep the HP kit in a separate lane entirely: it is the appropriate choice only for the named rack-server memory use case.
