AM4 · ATX · DDR4 · board-only configuration · MSI global specification
An ATX AM4 motherboard with AMD B550: four DDR4 slots rated up to DDR4-4800 (OC), a PCIe 4.0 x16 graphics slot, two M.2 slots (one PCIe 4.0 x4), six SATA ports and Realtek 1 Gb Ethernet.
Specifications checked 7 Sept 2026.
Amazon links open search results. Check the exact variant, current price and availability with the retailer.
Manufacturer specificationsDifferent platforms: AM4 vs LGA1700 sockets. Each board fits only processors made for its socket.
Choose the B550-A PRO for
Choose the MAG B660 TOMAHAWK WIFI DDR4 for
LGA 1700 · DDR4 · ATX · MSI global specification
An ATX LGA 1700 motherboard with Intel B660 and DDR4 memory: four DDR4 slots rated up to DDR4-4800+ (OC), a PCIe 4.0 x16 graphics slot, three M.2 slots, six SATA ports, 2.5 Gb Ethernet and Wi-Fi 6.
Specifications checked 8 Sept 2026.
Amazon links open search results. Check the exact variant, current price and availability with the retailer.
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Differences first. Select a topic for its graphic, sources and conditions.
Check the exact configuration and source conditions for your use.
Plan the complete platform. Check the exact CPU-support list, required BIOS and memory validation before buying. PCIe generations and lane allocations can change with the processor. A socket match or slot count is not a guarantee that every component works together at its highest advertised setting.
14 verified differences, most decision-relevant first. 7 are also drawn in Visual facts above. Missing information stays separate.
Manufacturer specification · Match the exact CPU and required BIOS as well as the physical socket.
MSI B550-A PRO — manufacturer specificationsManufacturer specification
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetCheck the exact configuration and source conditions for your use.
Manufacturer specification
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetDifferent hardware. A chip name or generation does not quantify real-world performance.
The overclocked speed is MSI's 1DPC 1R maximum (MSI's A-XMP speed list itself runs to 4400+ MHz); MSI lists 1DPC 2R up to 3866, 2DPC 1R up to 4000 and 2DPC 2R up to 3600 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
M2_1 connects to the CPU; M2_2 connects to the B550 chipset. · Manufacturer specification · M2_1 runs at PCIe 4.0 or 3.0 depending on the installed processor. A PCIe SSD in M2_2 disables PCI_E3.
MSI B550-A PRO — manufacturer specificationsM2_1 connects to the CPU; the other M.2 slots and SATA5–8 connect to the B660 chipset; SATAA and SATAB use an ASMedia ASM1061 controller. · Manufacturer specification · A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Onboard M.2 storage positions only. M.2 generation depends on the CPU. Installing a PCIe SSD in M2_2 disables PCI_E3.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
The x4-wired long slot is PCI_E3. · Manufacturer specification · Installing a PCIe SSD in M2_2 makes PCI_E3 unavailable.
MSI B550-A PRO — manufacturer specificationsPCI_E1 connects to the CPU; PCI_E2 (x16-length, x4 electrical) connects to the B660 chipset. · Manufacturer specification · Electrical link widths, not a guarantee of installed-system performance.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Wired Ethernet only; MSI lists no Wi-Fi or Bluetooth hardware for this board.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Wireless functionality, where fitted, depends on OS, driver, router and regional 6 GHz availability.
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result.
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Board headers, not supplied fans or an assertion of current limits.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · 4-pin board headers, not included fans or a statement of their current limits.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Requires integrated CPU graphics; supported modes depend on processor.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · These outputs require a processor with integrated graphics; MSI says graphics specifications vary with the installed CPU.
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · PCIe 4.0 or 3.0 depending on the installed processor; not a measured graphics performance result.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Electrical link of the primary graphics slot, not measured GPU performance.
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Requires compatible drives and array configuration; no data protection guarantee.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · SATAA and SATAB (ASMedia ASM1061 controller) do not support RAID. Listed modes require compatible drives and array setup and are not a data protection guarantee.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Requires compatible case ports and cabling; not rear sockets.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Manufacturer-listed front connectivity requires compatible case ports and cabling. These are not additional rear-panel sockets.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Port inventory and interface ratings, not simultaneous measured throughput or charging power.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Rear port inventory only. Rated interface rates are not simultaneous measured throughput; USB-C connector shape does not establish USB4 or charging power.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsCheck the exact configuration and source conditions for your use.
Manufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
MSI B550-A PRO — manufacturer specificationsManufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsThese descriptions or measurements differ. Wording alone does not establish a different capability; check the exact configuration.
Manufacturer specification · Button presence only. Recovery procedure and USB preparation require the exact manual.
MSI B550-A PRO — manufacturer specificationsMSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback. · Manufacturer specification · MSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Diagnostic indicators are not a numeric POST display or proof that a fault will be automatically repaired.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · ECC modules run in non-ECC mode, so error correction is not active.
MSI B550-A PRO — manufacturer specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Plan storage drives and expansion cards together; this restriction applies to this board's slot wiring.
MSI B550-A PRO — manufacturer specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Check the full manufacturer manual for simultaneous-device configurations.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
MSI labels these memory speeds in MHz (manufacturer notation); they are the rated data rates. · Manufacturer specification · Manufacturer OC configurations, not guaranteed kit speed or measured application performance. CPU, BIOS, memory rank and DIMMs per channel determine support.
MSI B550-A PRO — manufacturer specificationsNo source recorded for this side.
Evidence is missing or conflicting on at least one side. This is not a verified difference.
Manufacturer specification · Requires compatible drives and array configuration; no data protection guarantee.
MSI B550-A PRO — manufacturer specificationsMSI lists RAID modes for SATA drives only; NVMe RAID support is not stated. · Manufacturer specification · MSI lists RAID modes for SATA drives only; NVMe RAID support is not stated.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Manufacturer combined port/header totals; these are not all rear-panel sockets. Use the connection diagram and manual to locate them.
MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetEvidence is missing or conflicting on at least one side. This is not a verified difference.
No source recorded for this side.
Manufacturer specification · Manufacturer board dimensions; case mounting and connector clearance still need checking.
MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specificationsEvidence is missing or conflicting on at least one side. This is not a verified difference.
4 shared fields have the same recorded value.
| Specification | MSI B550-A PRO | MSI MAG B660 TOMAHAWK WIFI DDR4 |
|---|---|---|
CPU socketDifferent SourcesMSI B550-A PRO Manufacturer specification · Match the exact CPU and required BIOS as well as the physical socket. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheet | AM4 | LGA 1700 |
ChipsetDifferent SourcesMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheet | AMD B550 | Intel B660 |
Form factor SourcesMSI B550-A PRO Manufacturer specification · Board dimensions, not retail packaging. Check case mounting positions, clearance and cable routing. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | ATX; 305 × 244 mm | ATX; 305 × 244 mm |
CPU support / BIOS sourceDifferent SourcesMSI B550-A PRO Manufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Check MSI's exact CPU support list and its required BIOS. Family support does not confirm the firmware installed on a retail board. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | AMD Ryzen 5000 / 3000 Series (except Ryzen 5 3400G and Ryzen 3 3200G) and 4000 G-Series | Intel Core 14th / 13th / 12th Gen, Pentium Gold and Celeron |
Rear Flash BIOS button SourcesMSI B550-A PRO Manufacturer specification · Button presence only. Recovery procedure and USB preparation require the exact manual. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 MSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback. · Manufacturer specification · MSI's rear-panel list for this board does not mention a Flash BIOS button; check the manual if you need BIOS flashback. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Yes | Not listed by the manufacturer |
Board dimensions SourcesMSI B550-A PRO No source recorded. MSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Manufacturer board dimensions; case mounting and connector clearance still need checking. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Not provided | 305 × 244 mm |
Memory type, slots and limitDifferent SourcesMSI B550-A PRO The overclocked speed is MSI's 1DPC 1R maximum (MSI's A-XMP speed list itself runs to 4400+ MHz); MSI lists 1DPC 2R up to 3866, 2DPC 1R up to 4000 and 2DPC 2R up to 3600 MHz. JEDEC speeds run up to DDR4-3200. · Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · CPU, BIOS and validated DIMM population determine supported capacity and speeds. DDR4 and DDR5 are not interchangeable. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 4 DDR4 DIMM slots; dual channel; up to 128 GB; up to DDR4-4800 (OC); A-XMP; non-ECC unbuffered | 4 DDR4 DIMM slots; dual channel; up to 128 GB; up to DDR4-4800+ (OC) |
Maximum listed memory SourcesMSI B550-A PRO Manufacturer specification · Manufacturer capacity ceiling for this exact board, not included memory or a performance measurement. CPU, BIOS, DIMM population and the validated-module list determine support. DDR4 slots require DDR4 modules; DDR4 and DDR5 are not interchangeable. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Manufacturer capacity ceiling; CPU, BIOS and module validation apply. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 128 GB | 128 GB |
DIMM slots SourcesMSI B550-A PRO Manufacturer specification · Physical DDR4 module positions, not included modules. Consult the board manual for population order and compatible capacities. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Physical positions for DDR4 modules, not a capacity or speed guarantee. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheet | 4 | 4 |
Published memory OC configurations SourcesMSI B550-A PRO MSI labels these memory speeds in MHz (manufacturer notation); they are the rated data rates. · Manufacturer specification · Manufacturer OC configurations, not guaranteed kit speed or measured application performance. CPU, BIOS, memory rank and DIMMs per channel determine support. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 No source recorded. | 1DPC 1R up to 4800; 1DPC 2R up to 3866; 2DPC 1R up to 4000; 2DPC 2R up to 3600 | Not provided |
ECC module operating mode SourcesMSI B550-A PRO Manufacturer specification · ECC modules run in non-ECC mode, so error correction is not active. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 No source recorded. | ECC UDIMM supported in non-ECC mode | Not provided |
Storage interfacesDifferent SourcesMSI B550-A PRO M2_1 connects to the CPU; M2_2 connects to the B550 chipset. · Manufacturer specification · M2_1 runs at PCIe 4.0 or 3.0 depending on the installed processor. A PCIe SSD in M2_2 disables PCI_E3. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 M2_1 connects to the CPU; the other M.2 slots and SATA5–8 connect to the B660 chipset; SATAA and SATAB use an ASMedia ASM1061 controller. · Manufacturer specification · A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 1 × M.2 PCIe 4.0 x4; 1 × M.2 PCIe 3.0 x4; M2_1 also supports SATA; 6 × SATA 6 Gb/s | 2 × M.2 PCIe 4.0 x4; 1 × M.2 PCIe 4.0 x2; M2_2 and M2_3 also support SATA; 6 × SATA 6 Gb/s |
Onboard M.2 storage slotsDifferent SourcesMSI B550-A PRO Manufacturer specification · Onboard M.2 storage positions only. M.2 generation depends on the CPU. Installing a PCIe SSD in M2_2 disables PCI_E3. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 2 | 3 |
SATA storage ports SourcesMSI B550-A PRO Manufacturer specification · SATA 6 Gb/s connectors, not supplied drives or power cables. M.2 generation depends on the CPU. Installing a PCIe SSD in M2_2 disables PCI_E3. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 6 | 6 |
SATA RAID modesDifferent SourcesMSI B550-A PRO Manufacturer specification · Requires compatible drives and array configuration; no data protection guarantee. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · SATAA and SATAB (ASMedia ASM1061 controller) do not support RAID. Listed modes require compatible drives and array setup and are not a data protection guarantee. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | RAID 0/1/10 | RAID 0/1/5/10 |
NVMe RAID modes SourcesMSI B550-A PRO Manufacturer specification · Requires compatible drives and array configuration; no data protection guarantee. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 MSI lists RAID modes for SATA drives only; NVMe RAID support is not stated. · Manufacturer specification · MSI lists RAID modes for SATA drives only; NVMe RAID support is not stated. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | RAID 0/1 | Not listed by the manufacturer |
Primary expansion-slot linkDifferent SourcesMSI B550-A PRO Manufacturer specification · PCIe 4.0 or 3.0 depending on the installed processor; not a measured graphics performance result. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Electrical link of the primary graphics slot, not measured GPU performance. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | PCI_E1: PCIe 4.0 x16 | PCI_E1: CPU PCIe 4.0 up to x16 |
Secondary expansion slotsDifferent SourcesMSI B550-A PRO The x4-wired long slot is PCI_E3. · Manufacturer specification · Installing a PCIe SSD in M2_2 makes PCI_E3 unavailable. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 PCI_E1 connects to the CPU; PCI_E2 (x16-length, x4 electrical) connects to the B660 chipset. · Manufacturer specification · Electrical link widths, not a guarantee of installed-system performance. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 1 long PCIe 3.0 slot wired x4; 2 PCIe 3.0 x1 slots | 1 × PCIe 4.0 x16; 1 × PCIe 3.0 x4; 1 × PCIe 3.0 x1 |
Expansion/storage lane sharing SourcesMSI B550-A PRO Manufacturer specification · Plan storage drives and expansion cards together; this restriction applies to this board's slot wiring. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 No source recorded. | Installing a PCIe SSD in M2_2 makes PCI_E3 unavailable. | Not provided |
Lane-sharing restrictions SourcesMSI B550-A PRO No source recorded. MSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Check the full manufacturer manual for simultaneous-device configurations. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Not provided | A SATA M.2 drive in M2_3 disables SATA7. SATAA and SATAB do not support RAID. |
Onboard audio hardwareDifferent SourcesMSI B550-A PRO Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. Where alternatives are listed, no particular unseen controller revision is promised. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Manufacturer-listed onboard audio hardware, not a measured sound-quality result. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Realtek ALC892 or ALC897 codec; 7.1-channel | Realtek ALC1220P codec; 7.1-channel |
Processor-dependent display outputsDifferent SourcesMSI B550-A PRO Manufacturer specification · Requires integrated CPU graphics; supported modes depend on processor. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · These outputs require a processor with integrated graphics; MSI says graphics specifications vary with the installed CPU. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | HDMI 2.1 and DisplayPort: up to 4096×2160 at 60 Hz | HDMI 2.1: up to 4K 60 Hz; DisplayPort 1.4: up to 4K 60 Hz |
Rear USB portsDifferent SourcesMSI B550-A PRO Manufacturer specification · Port inventory and interface ratings, not simultaneous measured throughput or charging power. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Rear port inventory only. Rated interface rates are not simultaneous measured throughput; USB-C connector shape does not establish USB4 or charging power. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 10 Gb/s Type-A; 1 USB 10 Gb/s Type-C | 4 USB 2.0; 4 USB 10 Gb/s Type-A; 1 USB 20 Gb/s Type-C |
Front USB header capacityDifferent SourcesMSI B550-A PRO Manufacturer specification · Requires compatible case ports and cabling; not rear sockets. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Manufacturer-listed front connectivity requires compatible case ports and cabling. These are not additional rear-panel sockets. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 5 Gb/s Type-C | 4 USB 2.0; 2 USB 5 Gb/s Type-A; 1 USB 10 Gb/s Type-C |
USB port and header capacity SourcesMSI B550-A PRO No source recorded. MSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Manufacturer combined port/header totals; these are not all rear-panel sockets. Use the connection diagram and manual to locate them. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheet | Not provided | 1 × USB 20 Gb/s (1 Type-C); 5 × USB 10 Gb/s (4 Type-A + 1 Type-C); 2 × USB 5 Gb/s (2 Type-A); 8 × USB 2.0 |
Network interfacesDifferent SourcesMSI B550-A PRO Manufacturer specification · Wired Ethernet only; MSI lists no Wi-Fi or Bluetooth hardware for this board. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Wireless functionality, where fitted, depends on OS, driver, router and regional 6 GHz availability. MSI MAG B660 TOMAHAWK WIFI DDR4 — exact model datasheetMSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Realtek 8111H 1 Gb Ethernet | Realtek 2.5 Gb Ethernet; Intel Wi-Fi 6; Bluetooth 5.2 |
Cooling headersDifferent SourcesMSI B550-A PRO Manufacturer specification · Board headers, not supplied fans or an assertion of current limits. MSI B550-A PRO — manufacturer specificationsMSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · 4-pin board headers, not included fans or a statement of their current limits. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | 1 CPU; 1 pump; 6 system fan headers | 1 CPU fan; 1 water-pump fan; 5 system fan headers |
Diagnostic indicators SourcesMSI B550-A PRO No source recorded. MSI MAG B660 TOMAHAWK WIFI DDR4 Manufacturer specification · Diagnostic indicators are not a numeric POST display or proof that a fault will be automatically repaired. MSI MAG B660 TOMAHAWK WIFI DDR4 — current detailed specifications | Not provided | 4 EZ Debug LEDs |
Closest motherboards to this pair by shared key specifications. Not a popularity ranking.
Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.
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