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Best Motherboard for 9800X3D (2026): 5 Picks, B850 to X870E
The best motherboard for 9800X3D builds is usually a good B850 board, not an X870E flagship. The Ryzen 7 9800X3D is a 120W eight-core chip, so the board's job is clean power, current firmware and the I/O your build uses.
Below are five picks by chipset tier and form factor, each framed as a pairing for this CPU, with the tradeoff that decides it.
Our top pick: MSI MAG B850 Tomahawk MAX WiFi
The MSI MAG B850 Tomahawk MAX WiFi gives the 9800X3D a 14+2+1 VRM with 80A stages, four M.2 slots and 5GbE for far less than an X870E board, and the CPU runs exactly as fast on it.
Quick picks
Pick | Board | Best for | Buy |
|---|---|---|---|
Best Overall | Most 9800X3D gaming builds | ||
Best X870E | USB4, five M.2 drives, memory tuning | ||
Best Premium | X3D-specific tuning, top-end build | ||
Best Budget | Tightest budget that still fits an X3D | ||
Best Compact | Mini-ITX and small form factor builds |
Best Overall
- Board
- Best for
Most 9800X3D gaming builds
- Buy
Best X870E
- Board
- Best for
USB4, five M.2 drives, memory tuning
- Buy
Best Premium
- Board
- Best for
X3D-specific tuning, top-end build
- Buy
Best Budget
- Board
- Best for
Tightest budget that still fits an X3D
- Buy
Best Compact
- Board
- Best for
Mini-ITX and small form factor builds
- Buy
Specs at a glance
Board | Chipset | Size | VRM | M.2 slots | USB4 | Networking |
|---|---|---|---|---|---|---|
B850 | ATX | 14+2+1, 80A | 4 (2x Gen5) | No | Wi-Fi 7, 5GbE | |
X870E | ATX | 18+2+2 | 5 | Yes | Wi-Fi 7 | |
X870E | ATX | 18+2+2 | 5 | Yes | Wi-Fi 7 | |
B850 | ATX | MSI digital (listed specs vary) | 3 (1x Gen5) | No | Wi-Fi 7, 5GbE | |
X870 | Mini-ITX | 10+2+1 | 2 | Yes | Wi-Fi 7 |
- Chipset
B850
- Size
ATX
- VRM
14+2+1, 80A
- M.2 slots
4 (2x Gen5)
- USB4
No
- Networking
Wi-Fi 7, 5GbE
- Chipset
X870E
- Size
ATX
- VRM
18+2+2
- M.2 slots
5
- USB4
Yes
- Networking
Wi-Fi 7
- Chipset
X870E
- Size
ATX
- VRM
18+2+2
- M.2 slots
5
- USB4
Yes
- Networking
Wi-Fi 7
- Chipset
B850
- Size
ATX
- VRM
MSI digital (listed specs vary)
- M.2 slots
3 (1x Gen5)
- USB4
No
- Networking
Wi-Fi 7, 5GbE
- Chipset
X870
- Size
Mini-ITX
- VRM
10+2+1
- M.2 slots
2
- USB4
Yes
- Networking
Wi-Fi 7
How to pick a motherboard for the 9800X3D
What the 9800X3D asks of a board
Less than most buyers think. The 9800X3D has a 120W TDP and spends most of its gaming time well under that, so any AM5 board with a decent VRM and a real heatsink feeds it at stock and with PBO. We set the floor at boards with heatsinked power stages from families that hold up under 16-core chips, because a build with an X3D CPU deserves a board that is not the weak link.
Socket compatibility is not the same as build-ready. Very cheap A620 boards will boot the chip, as our 9800X3D on A620 guide covers, but thin VRM cooling makes them a poor match for a CPU you bought for its frame rates. AM4 boards are out entirely: see will the 9800X3D work on B550.
B850 vs X870 vs X870E in plain terms
B850 gives you PCIe 5.0 for the graphics card and at least one Gen5 M.2 slot, which covers a gaming build. X870 makes USB4 mandatory. X870E adds more PCIe 5.0 lanes and more high-speed USB through a second chipset, which is where five-drive boards come from.
For a single-GPU gaming PC, the frame rate is the same on all three. Spend on X870E only when you need USB4, more than two Gen5 drives, or a board that will carry a 16-core chip later. Our B850 roundup and X870 and X870E roundup go deeper on each tier, and are expensive motherboards worth it covers the five cases where the premium pays off.
Form factor first
Decide ATX or Mini-ITX before you compare boards. Mini-ITX limits you to two memory slots and two M.2 drives, and the case sets your cooler and GPU limits. If you are not building small, ATX gives you more slots for the same or less money.
BIOS and memory
Any B850 or X870 board ships with firmware that supports the 9800X3D. Older B650 and X670 boards needed the AGESA 1.2.0.2a BIOS or newer, so check the support list before you reuse one. On memory, every pick here runs a DDR5-6000 CL30 EXPO kit, which is the sweet spot for this CPU; higher speeds buy little in games.
Best Overall: MSI MAG B850 Tomahawk MAX WiFi
Specs
Chipset | AMD B850 |
Form factor | ATX |
VRM | 14+2+1, 80A smart power stages |
Memory | 4x DDR5, 8400+ MT/s (OC) |
M.2 | 4 slots, 2 at PCIe 5.0 |
GPU slot | PCIe 5.0 x16 |
Networking | Wi-Fi 7, 5GbE LAN |
Chipset
AMD B850
Form factor
ATX
VRM
14+2+1, 80A smart power stages
Memory
4x DDR5, 8400+ MT/s (OC)
M.2
4 slots, 2 at PCIe 5.0
GPU slot
PCIe 5.0 x16
Networking
Wi-Fi 7, 5GbE LAN
What it does well
The 9800X3D is a 120W chip. The Tomahawk MAX feeds it through a 14+2+1 VRM with 80A smart power stages under a proper heatsink. That is enough power delivery for a 16-core chip, so on this CPU it never works hard, even with PBO enabled.
Storage and I/O land where a 2026 build needs them: four M.2 slots with two of them at PCIe 5.0, a PCIe 5.0 x16 slot for the graphics card, Wi-Fi 7, and 5GbE wired networking. KitGuru scored it 9.0 and called it a budget winner, and Tom's Hardware measured it among the most power-efficient boards in its test pool.
It is also the honest answer to the chipset question. For a single-GPU gaming rig, a B850 board at this level gives you everything X870E boards sell as headline features except native USB4.
What you give up
No USB4. If you run fast external SSDs or a USB4 dock, that one feature is the reason to step up to the ASUS ROG Strix X870E-E instead.
Reviews disagree on the exact VRM count (KitGuru lists 14+2+1, Profesional Review counts 16 phases), but both describe 80A stages, so the disagreement does not change the verdict for an eight-core chip. MSI also sells a Tomahawk MAX WiFi II revision at a higher price; the original is the one to buy unless the newer board is on sale.
Who it's for
Anyone building a 9800X3D gaming PC around one graphics card who wants the board to disappear from the conversation. It suits 1440p and 4K builds with an RTX 5070 Ti class GPU or above, where every spare dollar should go to the GPU.
Best X870E: ASUS ROG Strix X870E-E Gaming WiFi
Specs
Chipset | AMD X870E |
Form factor | ATX |
VRM | 18+2+2 power stages |
Memory | 4x DDR5 with ASUS AEMP |
M.2 | 5 slots, PCIe 5.0 capable |
USB4 | Yes, 40Gbps |
Networking | Wi-Fi 7 |
Chipset
AMD X870E
Form factor
ATX
VRM
18+2+2 power stages
Memory
4x DDR5 with ASUS AEMP
M.2
5 slots, PCIe 5.0 capable
USB4
Yes, 40Gbps
Networking
Wi-Fi 7
What it does well
This is the X870E board for buyers who will use what X870E adds. You get native USB4, five M.2 slots, an 18+2+2 power stage layout, and the Q-Release Slim latch that frees a long graphics card without reaching behind it.
The 18+2+2 VRM is far beyond what the 9800X3D draws, which means the board runs cool under PBO and still has headroom if you drop in a 16-core chip later. ASUS's memory profile tuning (AEMP) is a real help on kits that ship without an EXPO profile.
Among full X870E boards it is one of the more sensible buys: you pay for the platform features, not for a flagship cosmetic package.
What you give up
For a pure gaming build, most of the extra money buys nothing you will see in frame rates. The 9800X3D runs the same games at the same speed on the B850 Tomahawk MAX.
Five M.2 slots on AM5 share lanes, so filling every slot can drop bandwidth on others. Check the manual's lane table before you plan a four-drive array.
Who it's for
Builders who need USB4 for external storage or docks, plan to run four or more NVMe drives, or want a board that comfortably carries a 16-core upgrade years from now.
Best Premium: GIGABYTE X870E AORUS Master X3D
Specs
Chipset | AMD X870E |
Form factor | ATX |
VRM | 18+2+2 power phases |
Memory | 4x DDR5 |
M.2 | 5 slots, PCIe 5.0 capable |
USB4 | Yes, Type-C |
Networking | Wi-Fi 7 |
X3D feature | X3D Turbo Mode 2.0 |
Chipset
AMD X870E
Form factor
ATX
VRM
18+2+2 power phases
Memory
4x DDR5
M.2
5 slots, PCIe 5.0 capable
USB4
Yes, Type-C
Networking
Wi-Fi 7
X3D feature
X3D Turbo Mode 2.0
What it does well
The Master X3D is a flagship built around X3D chips. Gigabyte's X3D Turbo Mode 2.0 offers two switchable profiles that adjust CPU and memory settings for cache-heavy Ryzen parts, which is exactly the CPU in this build.
Underneath the branding it is a full X870E Master: an 18+2+2 power layout arranged as 9+9 parallel phases, five M.2 slots, USB4 Type-C and Wi-Fi 7. Wccftech found the tuning options and board design standout, and the VRM has more headroom than the 9800X3D will ever use.
What you give up
Reviews of Turbo Mode are split. Tom's Hardware found no significant out-of-the-box gain, although it tested with a non-X3D Ryzen 9 9900X, and Club386's review of the sibling Aorus Elite X3D found real-world gains vary. Treat the mode as a free extra to try, not as the reason to spend flagship money.
The price is several times what the 9800X3D needs from a motherboard. If the build budget is fixed, that difference buys a full GPU tier, which moves frame rates far more than any board feature.
Who it's for
Buyers with no budget ceiling who want the best-equipped X3D-branded board, plan to run several Gen5 drives, and like to tune memory and CPU settings themselves.
Best Budget: MSI B850 Gaming Plus WiFi
Specs
Chipset | AMD B850 |
Form factor | ATX |
Memory | 4x DDR5, 8200+ MT/s (OC) |
M.2 | 3 slots, 1 at PCIe 5.0 |
Expansion | PCIe 5.0 x16 plus PCIe 4.0 x16 (physical) |
Networking | Wi-Fi 7, 5GbE LAN |
Chipset
AMD B850
Form factor
ATX
Memory
4x DDR5, 8200+ MT/s (OC)
M.2
3 slots, 1 at PCIe 5.0
Expansion
PCIe 5.0 x16 plus PCIe 4.0 x16 (physical)
Networking
Wi-Fi 7, 5GbE LAN
What it does well
This is the cheapest board on the list that still checks every box a 9800X3D build needs: B850 firmware that supports the chip out of the box, four DDR5 slots, a Gen5 M.2 slot, Wi-Fi 7 and 5GbE networking.
The 9800X3D is an efficient eight-core part, so it does not need a heavyweight VRM. A board in this class runs it at stock and with PBO without drama, which is why the money is better spent on the graphics card.
What you give up
Published VRM specs for this board disagree: MSI markets a digital power design, and spec aggregators list anything from 8+2+1 to 12+2+1. That is fine for the 9800X3D, but if you might move to a 16-core chip later, the Tomahawk MAX is the safer floor.
Three M.2 slots instead of four, and only one at Gen5. The second full-length PCIe slot is for a capture card or network card; check the manual for its electrical lane count before you plan around it.
Who it's for
Budget-capped 1080p and 1440p gaming builds where the 9800X3D was a stretch and every saving goes to the GPU. It is also a clean replacement board for an older AM5 build.
Best Compact: ASUS ROG Strix X870-I Gaming WiFi
Specs
Chipset | AMD X870 |
Form factor | Mini-ITX |
VRM | 10+2+1 power stages |
Memory | 2x DDR5 with ASUS AEMP |
M.2 | 2 slots |
USB4 | Yes |
Networking | Wi-Fi 7 |
Chipset
AMD X870
Form factor
Mini-ITX
VRM
10+2+1 power stages
Memory
2x DDR5 with ASUS AEMP
M.2
2 slots
USB4
Yes
Networking
Wi-Fi 7
What it does well
The 9800X3D is the best gaming CPU you can put in a small case, because its low power draw keeps a compact cooler and a small VRM out of trouble. The Strix X870-I is built for that pairing: a 10+2+1 power stage layout, PCIe 5.0 for the graphics card, USB4 and Wi-Fi 7 on a Mini-ITX board.
ASUS also kept the Q-Release Slim latch, which matters more in a cramped case where you cannot reach the slot release once the card is in.
What you give up
Mini-ITX means two DIMM slots and two M.2 slots. Buy the memory capacity you want on day one (a 2x32GB kit if you multitask) and plan storage around two drives.
It costs more than ATX boards with more features, and small cases bring their own limits: check the cooler height and GPU length in the Mini-ITX case you choose before you order.
Who it's for
Small form factor builders who want 9800X3D frame rates in a shoebox-sized case and are fine with two memory slots and two drives.
Bottom line
If you are building a 9800X3D gaming PC around one graphics card, buy the MSI MAG B850 Tomahawk MAX WiFi. If you need USB4 or five M.2 slots, buy the ASUS ROG Strix X870E-E Gaming WiFi. If budget is no object and you want X3D-specific tuning, buy the GIGABYTE X870E AORUS Master X3D. If every dollar has to go to the GPU, buy the MSI B850 Gaming Plus WiFi. If you are building small, buy the ASUS ROG Strix X870-I Gaming WiFi.
Picking the rest of the build? Match the graphics card to your monitor with our best GPUs for the 9800X3D guide, or see how the chip compares in 9800X3D vs 7800X3D.
FAQ
Do I need an X870E motherboard for the Ryzen 7 9800X3D?
No. The 9800X3D runs at the same speed on a good B850 board as on an X870E flagship, because games are limited by the CPU and GPU, not the chipset. X870E is worth it only if you need USB4, more than two PCIe 5.0 M.2 drives, or extra headroom for a future 16-core chip. For most gaming builds the MSI MAG B850 Tomahawk MAX WiFi is the better buy.
Will my existing B650 or X670 motherboard work with the 9800X3D?
Yes, every AM5 chipset supports it, but older B650 and X670 boards need a BIOS with AGESA 1.2.0.2a or newer before the chip will run reliably. Check your board's CPU support list and update first. Many boards can flash the BIOS from a USB stick without a CPU installed, using the flashback button, which saves you from needing an older chip.
Does a new B850 or X870 board need a BIOS update for the 9800X3D?
No. B850, X870 and X870E boards launched after the 9800X3D and ship with firmware that supports it. Updating to the latest BIOS is still a good first step after the build boots, because later AGESA releases improve memory compatibility and fix bugs. Use the board maker's own download page.
Can a B850 board handle PBO on the 9800X3D?
Yes. The 9800X3D is a 120W chip, and a B850 board with a heatsinked VRM such as the Tomahawk MAX's 14+2+1 layout has plenty of margin for Precision Boost Overdrive. Gains from PBO on this CPU are small in games anyway. The VRM floor matters more if you plan to upgrade to a 16-core part later.
What RAM should I pair with a 9800X3D motherboard?
A 2x16GB or 2x32GB DDR5-6000 CL30 kit with an EXPO profile. That speed keeps the memory controller and Infinity Fabric in sync, and every board on this list runs it. Faster kits cost more and add little in games because the 3D V-Cache already hides much of the memory latency.
Is Mini-ITX a good idea for a 9800X3D build?
Yes, it is one of the best CPUs for a small build because it draws little power and runs cool for its speed. The tradeoffs are two memory slots, two M.2 drives and tighter cooler and GPU clearance. Check your case's limits before you buy, and pick a 2x32GB kit if you want room to grow.
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