How much RAM does the ASUS PRIME B660M-A AC D4 support?

The PRIME B660M-A AC D4 supports up to 128GB of memory across 4 slot(s), up to 32GB per slot.

What type of memory does the PRIME B660M-A AC D4 use?

It uses DDR4 UDIMM memory modules.

Loading…

Legal

Stay connected

Compatibility tips and upgrade deals, straight to your inbox. No spam.

Shop All

Software

Your systemASUS PRIME B660M-A AC D4Memory & Storage Upgrades

9 guaranteed-fit options

System at a glance

Memory type: DDR4
Slots: 4
Max memory: 128 GB

View full system details

Verified & fresh

Last re-checked: July 2026

Guaranteed-fit promise

Every part is matched to your machine's slots and drive bays and checked against its published specs before we list it.

System Details

Compatible memory for ASUS PRIME B660M-A AC D4

DDR4 · UDIMM · up to 3200 MT/s · Unbuffered

4×16GB = 64GB

Verified fit for your system

Fills all 4 slotsDual-channel

$349.98

In stock — ships within 1 business day

≈ $5.47/GB · 64GB total after upgrade

Guaranteed fit, or free return

Every option here is verified to fit this system. Muted means it fits too — we just don't stock it right now. Pick one to switch.

Specs re-checked against the source · last re-checked July 2026.

Compatible storage for ASUS PRIME B660M-A AC D4

NVMe M.2 2242 (PCIe Gen 4) SSD · NVMe M.2 2260 (PCIe Gen 4) SSD · NVMe M.2 2280 (PCIe Gen 4) SSD · SATA 2.5" SSD · SATA M.2 2280 SSD · SATA 2.5" Hard Drive

NVMe M.2 2242 (PCIe Gen 4) SSD · 256 GB

Spec-matched to your system

Not stocked right now. It still matches your system's specs— get an email the moment it's back.

Guaranteed fit, or free return

Every drive here matches this system's published specifications. Pick a drive type, then a capacity. Muted means it fits too — just not stocked right now.

Specs re-checked against the source · last re-checked July 2026.

How we know NVMe M.2 2242 (PCIe Gen 4) SSD fits

Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

Software for your upgrade — matched to your ASUS PRIME B660M-A AC D4.

Seifelden Upgrade AssistantFree

Checks the drivers on your ASUS PRIME B660M-A AC D4, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.

Complete your upgrade. This machine takes both memory and storage — add one from each tab above to do it in one order.

Why these are compatible

ASUS PRIME B660M-A AC D4 takes DDR4 UDIMM memory, 4 slots, up to 128 GB. Every option above matches those requirements, so it typically installs and runs without any firmware change.

“Verified fit” means the exact module was confirmed compatible against the manufacturer’s system scanner.

System specifications for ASUS PRIME B660M-A AC D4

Specifications reported for the ASUS PRIME B660M-A AC D4.

Memory

Memory type: DDR4
Form factor: UDIMM
Memory slots: 4
Maximum memory: 128 GB
Max per slot: 32 GB
Rated speed: 3200 MT/s

Storage

Drive configuration

Multiple

Drive interface

SATA/PCIe

M.2 slots

2 x 2242 or 2260 or 2280

M.2 connector

2260, 2280

M.2 PCIe generation

Gen4 x4

PCIe NVMe

Yes

SATA version

SATA 3 - 6Gb/s

Serial ATA support

Yes

Drive form factor

2.5" · M.2 2242 · M.2 2260 · M.2 2280

System

Chipset: Intel B660
Graphics support: PCI Express x16
Max DDR4 UDIMM: 128GB
USB support: 3.x Compliant
XMP: Yes
Processor: Intel

Good to know

Maximum capacity per slot is inferred from total capacity ÷ number of slots.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.
The drive bay size is inferred from the system's reported storage interface.
This is a SATA (not NVMe) M.2 drive — confirm your M.2 slot supports SATA drives.

Change system

Auto-detect

Read our compatibility guarantee

Get it free

Details & what it sends

Guaranteed fit

Matched to your machine's slots and drive bays before we list it — or your money back.

Free Upgrade Assistant

Auto-detect what you have and install it — on us.