What does it mean, "Dedicated LGA1700 mounting bracket required"?? Is this included, and if not, (a) why not; (b) what is a suitable part to buy?

The bracket is not needed when using a stock Intel cooler, if provided to you when you buy your CPU. This bracket is to secure a third party CPU cooler to the board. If you buy a third party CPU cooler like CoolerMaster, Corsair, etc, they will usually include a LGA1700 mounting bracket. I haven't really seen a brand that doesn't. Just make sure the cooler is LGA1700 compatible if you decide to buy one.

Will it work with a pcie 3.0 video card GTX - 970 ?

Yes, it will work with a PCIe 3.0 video card like the GTX 970.

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GIGABYTE B660M DS3H DDR4 B660 Intel LGA 1700 M-ATX Motherboard with DDR4, Dual M.2, PCIe 4.0, USB 3.2 Gen2 Type-C, 2.5GbE LAN

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Option: B660M DS3H DDR4

B660M AORUS PRO AX DDR4
B660M DS3H DDR4
B660M GAMING X AX DDR4 rev. 1.1
B660M AORUS ELITE AX DDR4
B660I AORUS PRO DDR4
B660 GAMING X AX DDR4

Intel LGA 1700 Socket: Supports 12th Gen Intel Core Series Processors
DDR4 Compatible: Dual Channel DDR4, 4 DIMMs
Sturdy Power Design: 6+2+1 Phases Hybrid Power Design, Premium Choke and Capacitors, 8-pin Solid Pin CPU Power Connector
Comprehensive Thermal Design: M.2 Thermal Guard
Next Gen Connectivity: PCIe 4.0, Dual NVME PCIe 4.0 x4 M.2, USB 3.2 Gen2 Type-C, HDMI 2.0
Fast Networking: 2.5GbE LAN
Dynamic Audio: High-End Audio Capacitors, Audio Noise Guard
Fine Tuning Features: RGB FUSION 2.0, Supports Addressable LED & RGB LED Strips, Smart Fan 6, Q-Flash Plus Update BIOS without installing, CPU, Memory, and GPU

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

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Model
Brand	GIGABYTE
Model	B660M DS3H DDR4

Supported CPU
CPU Socket Type	LGA 1700 * Dedicated LGA1700 mounting bracket is required.
CPU Type	Supports 13th / 12th Gen Intel Core, Pentium Gold, Celeron Processors

Chipsets
Chipset	Intel B660

Onboard Video
Onboard Video Chipset	Supported only by CPU with integrated graphic

Memory
Number of Memory Slots	4x288pin (DDR4)
Memory Standard	DDR4 3200
Maximum Memory Supported	128GB
Channel Supported	Dual Channel

Expansion Slots
PCI Express 4.0 x16	1 x PCI Express x16 slot, running at x16 (The PCIEX16 slot conforms to PCI Express 4.0 standard.)
PCI Express x1	2 x PCI Express x1 slots (The PCIEX1 slots conform to PCI Express 3.0 standard.)

Storage Devices
Serial ATA (SATA)	4 x SATA 6Gb/s
M.2	2 x M.2

Onboard LAN
Max LAN Speed	2.5Gbps

Software Feature
Windows 11	Supported

Physical Spec
Form Factor	Micro ATX
LED Lighting	RGB

Additional Information
First Listed on Newegg	November 04, 2025

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