The ASUS EX-B660M-V5 is a microATX motherboard designed for Intel's 12th Gen Core processors. Here are the detailed specifications:

CPU Support:

- Intel Socket LGA1700 for 12th Gen Intel Core, Pentium Gold, and Celeron Processors.

- Supports Intel Turbo Boost Technology 2.0 and Intel Turbo Boost Max Technology 3.0 (Support depends on CPU types).

Chipset:

- Intel B660 Chipset.

Memory Support:

- 2 x DIMM slots, Max. 64GB, DDR4.

- Memory speeds: 5333(OC)/5000(OC)/4800(OC)/4600(OC)/.../2133 MHz.

- Dual Channel Memory Architecture.

- Supports Intel Extreme Memory Profile (XMP).

Graphics:

- 1 x D-Sub port.

- 1 x HDMI port (Supports 4K@60Hz as specified in HDMI 2.1).

- Graphics specifications may vary between CPU types.

Expansion Slots:

- 1 x PCIe 4.0/3.0 x16 slot (for Intel 12th Gen processors).

- 2 x PCIe 3.0 x1 slots.

Storage:

- Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports.

- M.2_1 slot (Key M) for Intel 12th Gen Processors (supports PCIe 4.0 x4 mode).

- M.2_2 slot (Key M) for Intel B660 Chipset (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.

 Ethernet:

- 1 x Realtek 1Gb Ethernet.

USB:

Rear USB (Total 6 ports):

- 4 x USB 3.2 Gen 1 ports (Type-A).

- 2 x USB 2.0 ports (Type-A).

Front USB (Total 6 ports):

- 1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports.

- 2 x USB 2.0 headers support an additional 4 USB 2.0 ports.

 Audio:

- 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.

- Premium Audio capacitors, Audio Shielding, 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.

 Back Panel I/O Ports:

- 4 x USB 3.2 Gen 1 ports (Type-A).

- 2 x USB 2.0 ports (Type-A).

- 1 x D-Sub port.

- 1 x HDMI port.

- 3 x Audio jacks.

- 1 x Realtek 1Gb Ethernet port.

- 1 x PS/2 Keyboard/Mouse combo port.

Internal I/O Connectors:

 Fan and cooling related:

- 1 x 4-pin CPU Fan header.

- 1 x 4-pin Chassis Fan header.

Power related:

- 1 x 24-pin Main Power connector.

- 1 x 8-pin +12V Power connector.

Storage Related:

- 2x M.2 slots (Key M).

- 4 x SATA 6Gb/s ports.

USB:

- 1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports.

- 2 x USB 2.0 headers support an additional 4 USB 2.0 ports.

Miscellaneous:

- 1 x Clear CMOS header.

- 1 x Front Panel Audio header (AAFP).

- 1 x Speaker header.

- 1 x 10-1 pin System Panel header.

Special Features:

- ASUS 5X PROTECTION III: DIGI+ VRM, LANGuard, Overvoltage Protection, SafeSlot Core+, Stainless-Steel Back I/O.

- ASUS Q-Design: Q-DIMM, Q-Slot.

- ASUS EZ DIY: ProCool.

- Non-stop Action: Lightning Boot.

- Non-stop Challenger: ASUS iCafe labs certified.

- Non-stop Durability: Luminous Anti-moisture coating, USBGuard.

BIOS:

- 128 Mb Flash ROM, UEFI AMI BIOS.

Manageability:

- WOL by PME, PXE.

Accessories:

Cables:

- 2 x SATA 6Gb/s cables.

Miscellaneous:

- 1 x I/O Shield.

- 2 x M.2 Anchors.

Installation Media:

- 1 x Support DVD.

Documentation:

- 1 x User guide.

 Operating System:

- Windows 11 64-bit, Windows 10 64-bit.

 Form Factor:

- microATX (mATX) Form Factor.

- Dimensions: 9.6 inch x 8.3 inch (24.4cm x 21.1cm).