B840M DS3H
The Gigabyte B840M DS3H is a Micro ATX AM5 motherboard on the B840 chipset. It supports DDR5 memory up to 7,200 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 B840M DS3His 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.
Max CPU power
150 W
The B840M DS3H can reliably power a CPU drawing up to about 150 W from its 2x4+2+2 power-stage (VRM) layout. That’s the number that decides whether a board can run a power-hungry chip at full boost without throttling — comfortable for mainstream 65–125 W CPUs.
Specifications
Platform
- Chipset
- B840
- Socket
- AM5
- Form factor
- Micro ATX
- MSRP
- $9,999.00
Memory
- Type
- DDR5
- Slots
- 4
- Max speed
- 7,200 MT/s
- Max capacity
- 192 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- Max CPU power
- 150 W
- Phase config
- 2x4+2+2
- VRM stages
- 55A DrMOS
- EPS power
- 8
- VRM heatsink
- Partial (single bank)
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 2× PCIe 4.0 ×4
- M.2 heatsinks
- Slots 1
- SATA ports
- 4 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16, 1× PCIe 3.0 ×4
Ethernet & Wi-Fi
- Realtek RTL8125
- 2.5 GbE
- Ethernet ports
- 1
- Wi-Fi
- None
USB & I/O
- Rear USB-A
- 4× USB 2.0, 2× 5 Gbps
- Rear USB-C
- 1× 5 Gbps
- Front USB-C
- 1× 5Gbps
- Front USB 3 headers
- 1
- Front USB 2 headers
- 2
Audio & Video
- Audio codec
- ALC897
- Audio jacks
- 3
- HDMI
- HDMI 2.1
- DisplayPort
- DP 2 1.4
Cooling, RGB & Design
- Fan headers
- 4
- 12V RGB headers
- 1
- 5V ARGB headers
- 2
- PCB colour
- Black, Light Grey
- Heatsink colour
- Black, Light Grey
Onboard & Diagnostics
- BIOS Flashback
- Yes (rear)
- Diagnostics
- Debug LEDs
- TPM header
- Yes
Compare the B840M DS3H against every other board on the motherboard comparison table. Not sure it fits your chip? The socket compatibility guide explains AM5 pairings.
Where to buy the B840M DS3H
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | — | See on Amazon |  |
The B840M DS3H starts from $171.27 across 1 retailer (No onboard Wi-Fi). Prices update daily from live stock.
Which CPUs fit the B840M DS3H?
Compare all CPUs →In-stock AM5 processors this board can run — socket-matched and within its 150 W VRM budget, ranked by gaming value (performance per dollar).
| Processor | Cores | Gaming | From | |
|---|---|---|---|---|
 | Ryzen 5 7600X AMD | 6/12 | 67.3 | $160.00 |
 | Ryzen 5 9600X AMD | 6/12 | 72.6 | $177.95 |
 | Ryzen 5 8400F AMD | 6/12 | 50.0 | $125.61 |
 | Ryzen 5 7500F AMD | 6/12 | 61.0 | $174.57 |
 | Ryzen 5 8500G AMD | 6/12 | 52.0 | $148.90 |
 | Ryzen 7 7700X AMD | 8/16 | 70.6 | $223.99 |
 | Ryzen 5 7600 AMD | 6/12 | 63.4 | $209.90 |
 | Ryzen 5 8600G AMD | 6/12 | 55.0 | $187.88 |
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