PRIME B660M-A D4-CSM

2024/08/12: The new BIOS with Intel microcode (0x129) enhancing the stability of Intel Core 13th and 14th Gen desktop processors is now available. Please visit support site for the latest BIOS updates.

Intel^® Socket LGA1700 for Intel^® Core™ 14th & 13th Gen Processors, Intel^® Core™ 12th Gen, Pentium^® Gold and Celeron^® Processors

Supports Intel^® Turbo Boost Technology 2.0 and Intel® Turbo Boost Max Technology 3.0**
* Refer to www.asus.com for CPU support list.
** Intel^® Turbo Boost Max Technology 3.0 support depends on the CPU types.

Intel^® B660 Chipset
Intel^® B660 Chipset

4 x DIMM, Max. 128GB, DDR4
5333(OC)/5000(OC)/4800(OC)/4600(OC)/4400(OC)/4266(OC)/4000(OC)/3733(OC)/3600(OC)/3466(OC)/3400(OC)/3333(OC)/3200/3000/2933/2800/2666/2400/2133 Non-ECC, Un-buffered Memory* "
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
OptiMem II
*Actual memory data rate depends on the CPU types and DRAM modules, for more information refer to www.asus.com for memory support list.

1 x DisplayPort **  
2 x HDMI^TM ports***  
* Graphics specifications may vary between CPU types. Please refer to www.intel.com for any updates.
** Supports max. 4K@60Hz as specified in DisplayPort 1.4.  
***Supports 4K@60Hz as specified in HDMI 2.1.

Intel^® 12th Gen Processors
1 x PCIe 4.0/3.0 x16 slot
Intel^® B660 Chipset *
1 x PCIe 3.0 x16 slot (supports x4 mode)
1 x PCIe 3.0 x16 slot (supports x1 mode)
*Supports Intel^® Optane Memory H Series on PCH-attached PCIe slot

Total supports 2 x M.2 slots and 4x SATA 6Gb/s ports*
Intel^® 12th Gen Processors
M.2_1 slot (Key M), type 2242/2260/2280
- Intel^® 12th Gen processors support PCIe 4.0 x4 mode.  
Intel^® B660 Chipset**
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
4 x SATA 6Gb/s ports
* Intel^® Rapid Storage Technology supports  SATA RAID 0/1/5/10.
** Intel^® Rapid Storage Technology supports Intel^® Optane Memory H Series on PCH attached M.2 slots

Front USB:Total 10 ports

Rear USB (Total 6 ports)
2 x USB 3.2 Gen 2 ports (2 x Type-A )
4 x USB 2.0 ports (4 x Type-A)  
Front USB (Total 10 ports)
2 x USB 3.2 Gen 1 headers support additional 4 USB 3.2 Gen 1 ports
1 x USB 3.2 Gen 1 connector (supports USB Type-C^®)  
2 x USB 2.0 headers support additional 4 USB 2.0 ports
1 x USB 2.0 header support 1 USB 2.0 port

Realtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback "
Audio Features  
- Audio Shielding  
- Premium audio capacitors
- Dedicated audio PCB layers
** A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

2 x USB 3.2 Gen 2 ports (2 x Type-A )
4 x USB 2.0 ports (4 x Type-A)  
1 x DisplayPort
2 x HDMI^TM ports
1 x Intel^® 1Gb Ethernet port
3 x Audio jacks  
1 x PS/2 Keyboard/Mouse combo port

Fan and Cooling related  
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
2 x 4-pin Chassis Fan headers
Power related  
1 x 24-pin Main Power connector
1 x 8-pin +12V Power connector
Storage related  
2 x M.2 slots (Key M)  
4 x SATA 6Gb/s ports
USB  
2 x USB 3.2 Gen 1 headers support additional 4 USB 3.2 Gen 1 ports
1 x USB 3.2 Gen 1 connector (supports USB Type-C^®)  
2 x USB 2.0 headers support additional 4 USB 2.0 ports
1 x USB 2.0 header supports  1 USB 2.0 port
Miscellaneous
3 x AURA Addressable Gen 2 headers
1 x AURA RGB header
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (AAFP)  
1 x LPT header
1 x S/PDIF Out header
1 x SPI TPM header (14-1pin)
1 x 20-3 pin System Panel header with Chassis intrude function

ASUS 5X PROTECTION III  
- DIGI+ VRM  
- Enhanced DRAM Overcurrent Protection
- ESD Guards  
- LANGuard  
- Overvoltage Protection
- SafeSlot Core+
- Stainless-Steel Back I/O
ASUS Q-Design  
- Q-DIMM
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- ProCool  
AURA Sync
- AURA RGB header
- Addressable Gen 2 RGB headers

ASUS Exclusive Software
Armoury Crate
- AURA Creator
- AURA Sync
- Fan  Xpert 2+
AI Suite 3
- Performance And Power Saving Utility
  TurboV EVO
  EPU  
  Digi+ VRM
ASUS CPU-Z
Norton Anti-virus software (Free Trial version)  
WinRAR
UEFI BIOS
ASUS EZ DIY  
- ASUS CrashFree BIOS 3  
- ASUS EZ Flash 3  
- ASUS UEFI BIOS EZ Mode

128 Mb Flash ROM, UEFI AMI BIOS

WOL by PME, PXE

Cables
2 x SATA 6Gb/s cables  
Miscellaneous
1 x I/O Shield  
1 x M.2 Rubber Package
1 x M.2 SSD screw package
Installation Media
1 x Support DVD  
Documentation
1 x User manual

1 x Intel^® 1Gb Ethernet

WOL by PME, PXE

Windows^® 11 64-bit, Windows^® 10 64-bit

mATX Form Factor
9.6 inch x 9.6 inch ( 24.4 cm x 24.4 cm )