MAG B660M MORTAR DDR4
The MSI MAG B660M MORTAR DDR4 is a Micro ATX LGA1700 motherboard on the B660 chipset. It supports DDR4 memory up to 4,800 MT/s and 2 M.2 slots. Full specs, power delivery, and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
MaxMyBuild scores
How we score →How well the MAG B660M MORTAR DDR4 is equipped for gaming and for productivity, scored 0–100 from its specs. Scores are fit-for-purpose: a capable board can top the gaming score without being the most expensive.
Weighs CPU power delivery, memory speed support, the GPU PCIe slot, Wi-Fi version, and M.2 storage — the things that actually matter for a gaming build.
Rewards fast, plentiful M.2 storage and USB I/O, PCIe expansion, memory capacity and slots — what matters for content creation and heavy multitasking.
CPU power
367 W
Sufficient · 1.2x
Wired for about 367 W, enough for every processor on this socket including the top Core i9 chips at their 300 W ceiling, without a lot left over. The figure comes from its 12+1+1 power-stage (VRM) layout and 8+8 EPS connectors. It is a rating of what the board is built to deliver, not a measurement, so treat it as headroom rather than a guarantee.
Specifications
Platform
- Chipset
- B660
- Socket
- LGA1700
- Form factor
- Micro ATX
Memory
- Type
- DDR4
- Slots
- 4
- Max speed
- 4,800 MT/s
- Max capacity
- 128 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 367 W
- Phase config
- 12+1+1
- EPS power
- 8+8
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 2× PCIe 4.0 ×4
- SATA ports
- 6 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16, 1× PCIe 3.0 ×4
- Other PCIe slots
- 1× PCIe 3.0 ×1
Ethernet & Wi-Fi
- Realtek RTL8125BG
- 2.5 GbE
- Ethernet ports
- 1
- Wi-Fi
- None
USB & I/O
- Rear USB-A
- 4× USB 2.0, 3× 10 Gbps
- Rear USB-C
- 1× 20 Gbps
- Front USB-C
- 1× 10Gbps
- Front USB 3 headers
- 1
- Front USB 2 headers
- 2
- Thunderbolt header
- Yes
Audio & Video
- Audio codec
- Realtek ALC1200
- Audio jacks
- 5
- S/PDIF out
- Yes
- HDMI
- HDMI 2.1
- DisplayPort
- DP 1.4
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 4
- 12V RGB headers
- 1
- 5V ARGB headers
- 2
Onboard & Diagnostics
- Diagnostics
- Debug LEDs
- TPM header
- Yes
Compare the MAG B660M MORTAR DDR4 against every other board on the motherboard comparison table. Not sure it fits your chip? The socket compatibility guide explains LGA1700 pairings.
Where to buy the MAG B660M MORTAR DDR4
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Newegg | In stock | $203.06 |  |
The MAG B660M MORTAR DDR4 starts from $203.06 across 1 retailer (No onboard Wi-Fi). Prices update daily from live stock.
Which CPUs fit the MAG B660M MORTAR DDR4?
Compare all CPUs →In-stock LGA1700 processors this board can run, socket-matched and within its 367 W power budget, ranked by gaming value (performance per dollar).
| Processor | Cores | Gaming | From | |
|---|---|---|---|---|
| Core i3-14100F Intel | 4/8 | 50.0 | $104.99 | |
| Core i3-14100 Intel | 4/8 | 50.0 | $142.80 | |
| Core i5-14400F Intel | 10/16 | 58.0 | $178.99 | |
| Core i3-12100 Intel | 4/8 | 48.0 | $149.00 | |
| Core i5-14600KF Intel | 14/20 | 72.8 | $234.00 | |
| Core i5-12600KF Intel | 10/16 | 60.8 | $199.95 | |
| Core i5-12400F Intel | 6/12 | 53.0 | $179.99 | |
| Core i5-14600K Intel | 14/20 | 72.8 | $249.97 |
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