Buying Guide

The Best Motherboards for the Ryzen 7 9800X3D and 7800X3D

Six AM5 motherboards for the Ryzen 7 9800X3D and 7800X3D, from a budget B850 to X870E, compared on M.2, networking and power.

By The PC Journal editorial team

12 min read6 products evaluated

The Ryzen 7 9800X3D and 7800X3D are eight-core chips rated at 120W, so any current AM5 board powers them comfortably. The choice comes down to storage, networking and budget.

We compared six AM5 boards on M.2 slots, networking, USB4 and power stages. This is a research-based comparison built from maker specifications; we did not test these parts ourselves. Update the BIOS if the board predates your chip.

Quick Picks

Our 6 recommendations at a glance. Tap a pick for the full verdict.

  1. Best for Most 9800X3D Builds

    ASUS ROG Strix B850-A Gaming WiFi

    Four M.2 slots, Wi-Fi 7 and a 14+2+2 layout on B850.

    Best for: Gaming-first 9800X3D builds.

    Our take Check price for ASUS ROG Strix B850-A Gaming WiFi (opens in a new tab)

  2. Best X870E for X3D

    MSI MAG X870E Tomahawk MAX WiFi PZ

    5Gbps LAN, USB4 and four M.2 slots.

    Best for: X3D builds that want every feature.

    Our take Check price for MSI MAG X870E Tomahawk MAX WiFi PZ (opens in a new tab)

  3. Well-Rounded Choice

    GIGABYTE X870E AORUS PRO X3D ICE

    The X870E AORUS PRO X3D is Gigabyte's board branded for X3D chips, with an 18+2+2 layout, USB4 and four M.2 slots in a white ICE finish.

    Best for: Buyers who want 4 m.2 slots for ssd expansion.

    Our take Check price for GIGABYTE X870E AORUS PRO X3D ICE (opens in a new tab)

  4. Solid Alternative

    MSI MAG B850 Tomahawk MAX WiFi

    The B850 Tomahawk MAX is a strong mid-range match, with four M.2 slots, 5Gbps LAN and Wi-Fi 7 on B850.

    Best for: Buyers who want 4 m.2 slots for ssd expansion.

    Our take Check price for MSI MAG B850 Tomahawk MAX WiFi (opens in a new tab)

  5. Best Budget Pick

    ASRock B850 Pro RS WiFi

    Four M.2 slots on an entry-level B850 board.

    Best for: Spending the budget on the GPU instead.

    Our take Check price for ASRock B850 Pro RS WiFi (opens in a new tab)

  6. Worth Considering

    MSI MPG X870E Carbon WiFi

    The X870E Carbon is the premium MSI option with USB4 and Wi-Fi 7, for builds that want a high-end board to match a high-end chip.

    Best for: Buyers who want wi-fi 7 built in.

    Our take Check price for MSI MPG X870E Carbon WiFi (opens in a new tab)

Our Picks

ASUS ROG Strix B850-A Gaming WiFi

Best for Most 9800X3D Builds1 of 6

ASUS ROG Strix B850-A Gaming WiFi on Amazon (opens in a new tab)

The Strix B850-A gives a 9800X3D everything it needs: a 14+2+2 power layout, four M.2 slots and Wi-Fi 7, without X870E pricing.

Best for

Gaming-first 9800X3D builds.

Skip if

Skip it if price comes first: the B850 Pro RS cost less when we checked.

Why we like it

Its white finish suits light-themed builds. Its 14+2+2 VRM is rated at 80A per stage, and heatsinks bridge to the VRMs with thermal pads. ASUS AI Advisor simplifies setup.

It matches the B850 Pro RS on wired network speed (2.5Gbps). It also offers a rear USB 20Gbps port. It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback.

Check the manual for which M.2 slots share lanes with SATA ports or the second PCIe slot before filling them all. When we checked, only the B850 Pro RS cost less, and the B850 Tomahawk MAX cost more.

Key dimensions & specs

  • M.2 slots: 4
  • Wired LAN: 2.5Gbps
  • Wi-Fi: Wi-Fi 7
  • Power stages: 14+2+2
  • Form factor: ATX
  • Socket: AM5

Pros

  • 4 M.2 slots for SSD expansion
  • Wi-Fi 7 built in
  • 14+2+2 power stage layout
  • Rear USB 20Gbps port

Cons

  • Costs more than the B850 Pro RS at the time of writing
MSI MAG X870E Tomahawk MAX WiFi PZ

Best X870E for X3D2 of 6

MSI MAG X870E Tomahawk MAX WiFi PZ on Amazon (opens in a new tab)

The X870E Tomahawk MAX PZ adds USB4 with display output, 5Gbps LAN and four M.2 slots.

Best for

X3D builds that want every feature.

Skip if

Price-first buyers should look at the B850 Pro RS, which cost less when we checked.

Why we like it

It is the step up when you want X870E features. It matches the B850 Tomahawk MAX on wired network speed (5Gbps). It also offers a PCIe 5.0 graphics slot.

It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback. Check the manual for which M.2 slots share lanes with SATA ports or the second PCIe slot before filling them all. When we checked, only the B850 Tomahawk MAX and cheaper picks cost less, and the X870E AORUS PRO X3D cost more.

Key dimensions & specs

  • M.2 slots: 4
  • Wired LAN: 5Gbps
  • Wi-Fi: Wi-Fi 7
  • USB4: Yes
  • Form factor: ATX
  • Socket: AM5

Pros

  • 4 M.2 slots for SSD expansion
  • 5Gbps wired Ethernet
  • Wi-Fi 7 built in
  • USB4 ports on the rear panel

Cons

  • Costs more than the B850 Pro RS at the time of writing
GIGABYTE X870E AORUS PRO X3D ICE

Well-Rounded Choice3 of 6

GIGABYTE X870E AORUS PRO X3D ICE on Amazon (opens in a new tab)

The X870E AORUS PRO X3D is Gigabyte's board branded for X3D chips, with an 18+2+2 layout, USB4 and four M.2 slots in a white ICE finish.

Best for

Buyers who want 4 m.2 slots for ssd expansion.

Skip if

Its wired network speed is not published, which rules it out if you need that number.

Why we like it

You get 18+2+2 power stages here, which sets it apart from the B850 Pro RS and its 14+2+1 power stages. It also offers X3D branding aimed at Ryzen X3D builds. It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback.

Check the manual for which M.2 slots share lanes with SATA ports or the second PCIe slot before filling them all. On price it sat fifth of 6, between the cheaper X870E Tomahawk MAX PZ and the pricier X870E Carbon, at the time of writing. The maker doesn't give its wired network speed; if that figure matters, the X870E Tomahawk MAX PZ offers 5Gbps.

Key dimensions & specs

  • M.2 slots: 4
  • Power stages: 18+2+2
  • USB4: Yes
  • Form factor: ATX
  • Socket: AM5

Pros

  • 4 M.2 slots for SSD expansion
  • 18+2+2 power stage layout
  • USB4 ports on the rear panel
  • X3D branding aimed at Ryzen X3D builds

Cons

  • No published wired network speed
  • Costs more than the B850 Pro RS at the time of writing
MSI MAG B850 Tomahawk MAX WiFi

Solid Alternative4 of 6

MSI MAG B850 Tomahawk MAX WiFi on Amazon (opens in a new tab)

The B850 Tomahawk MAX is a strong mid-range match, with four M.2 slots, 5Gbps LAN and Wi-Fi 7 on B850.

Best for

Buyers who want 4 m.2 slots for ssd expansion.

Skip if

If budget leads, the B850 Pro RS was cheaper at our last price check.

Why we like it

It matches the X870E Tomahawk MAX PZ on wired network speed (5Gbps). It also offers a PCIe 5.0 x16 slot with Steel Armor and a rear USB 20Gbps Type-C port. It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback.

Check the manual for which M.2 slots share lanes with SATA ports or the second PCIe slot before filling them all. When we checked, only the Strix B850-A and cheaper picks cost less, and the X870E Tomahawk MAX PZ cost more.

Key dimensions & specs

  • M.2 slots: 4
  • Wired LAN: 5Gbps
  • Wi-Fi: Wi-Fi 7
  • Form factor: ATX
  • Socket: AM5

Pros

  • 4 M.2 slots for SSD expansion
  • 5Gbps wired Ethernet
  • Wi-Fi 7 built in
  • PCIe 5.0 x16 slot with Steel Armor

Cons

  • Costs more than the B850 Pro RS at the time of writing
ASRock B850 Pro RS WiFi

Best Budget Pick5 of 6

ASRock B850 Pro RS WiFi on Amazon (opens in a new tab)

The B850 Pro RS keeps four M.2 slots and a 14+2+1 layout on a budget board, with Wi-Fi 6E.

Best for

Spending the budget on the GPU instead.

Skip if

Worth skipping when wi-Fi 6E rather than Wi-Fi is a problem.

Why we like it

It leaves more money for the graphics card. It matches the Strix B850-A on wired network speed (2.5Gbps). It is the only pick here with a wi-Fi 6E; the Strix B850-A has a wi-Fi 7 instead.

It is the only pick here with 14+2+1 power stages; the Strix B850-A has 14+2+2 power stages instead. It also offers a PCIe 5.0 M.2 slot. It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback.

Check the manual for which M.2 slots share lanes with SATA ports or the second PCIe slot before filling them all. No other pick here cost less at our last price check, and the Strix B850-A was closest. M.2 slot count is its weakest area, and the Strix B850-A covers it better at 4.

Key dimensions & specs

  • M.2 slots: 4
  • Wired LAN: 2.5Gbps
  • Wi-Fi: Wi-Fi 6E
  • Power stages: 14+2+1
  • Form factor: ATX
  • Socket: AM5

Pros

  • 4 M.2 slots for SSD expansion
  • 14+2+1 power stage layout
  • PCIe 5.0 M.2 slot
  • Wi-Fi 6E, the only one here

Cons

  • Wi-Fi 6E rather than Wi-Fi 7
  • Wired network speed trails the X870E Tomahawk MAX PZ (5Gbps)
MSI MPG X870E Carbon WiFi

Worth Considering6 of 6

MSI MPG X870E Carbon WiFi on Amazon (opens in a new tab)

The X870E Carbon is the premium MSI option with USB4 and Wi-Fi 7, for builds that want a high-end board to match a high-end chip.

Best for

Buyers who want wi-fi 7 built in.

Skip if

Pass if a published M.2 slot count matters; this one has none.

Why we like it

It has dual LAN and an EZ PCIe release button, and a heat-piped VRM heatsink with 7W/mK pads keeps the power stage cool. It also offers PCIe 5.0 graphics and M.2 Gen5 slots and Bluetooth 5 alongside Wi-Fi 7. It uses AMD's AM5 socket, so it takes Ryzen 7000, 8000 and 9000 chips; a board built before a CPU's launch may need a BIOS update first, so check whether it supports BIOS Flashback.

Only the X870E AORUS PRO X3D came close to it on price at the time of writing; it cost the most of the 6 picks. There is no published M.2 slot count figure, whereas the Strix B850-A offers 4.

Key dimensions & specs

  • Wi-Fi: Wi-Fi 7
  • USB4: Yes
  • Form factor: ATX
  • Socket: AM5

Pros

  • Wi-Fi 7 built in
  • USB4 ports on the rear panel
  • PCIe 5.0 graphics and M.2 Gen5 slots
  • Bluetooth 5 alongside Wi-Fi 7

Cons

  • No published M.2 slot count
  • No published wired network speed
  • Costs more than the B850 Pro RS at the time of writing

How We Chose These 9800X3D Motherboards

Each pick was assessed across 4 criteria weighted for real-world use.

Power delivery
We noted power stage layouts where the maker lists them.
Storage
We counted listed M.2 slots and PCIe 5.0 support.
Platform
We checked socket, chipset and form factor from each listing.
Connectivity
We compared Wi-Fi, wired LAN speed and USB4.

What to Look for in a 9800X3D Motherboard

Key buying criteria so you get the right fit the first time.

  1. Check BIOS support and Flashback

    A board may need a BIOS update before it runs a newer CPU. BIOS Flashback lets you update without a working CPU installed.

  2. Match the chipset to your plans

    On AM5, B850 covers most gaming builds with PCIe 5.0 for at least one slot. X870E adds more PCIe 5.0 lanes and USB4 for heavy expansion.

    Features, not frame rates, separate the chipsets.

  3. Check the rear and front I/O

    Count USB ports you use every day and confirm a front USB-C header if your case has a USB-C port.

  4. Power delivery for high-end CPUs

    Boards with more and stronger power stages run hot 16-core chips more comfortably. For eight-core gaming CPUs, most current boards are enough.

  5. Networking matters for daily use

    Wi-Fi 7 and 5Gbps Ethernet help only if your router supports them, but built-in Wi-Fi saves a PCIe card.

  6. Count M.2 slots

    Most games now install to NVMe drives. Count how many M.2 slots you need now and later, and check which ones share lanes with other ports.

How to Choose a 9800X3D Motherboard

By priority

PriorityConsiderWhy
Gaming-first 9800X3D buildsStrix B850-AFour M.2 slots, Wi-Fi 7 and a 14+2+2 layout on B850
X3D builds that want every featureX870E Tomahawk MAX PZ5Gbps LAN, USB4 and four M.2 slots
Spending the budget on the GPU insteadB850 Pro RSFour M.2 slots on an entry-level B850 board

Scroll sideways to see every column.

Key specs side by side

Figures as each maker states them.

BoardM.2 slotsWired LANWi-FiPower stages
Strix B850-A42.5GbpsWi-Fi 714+2+2
X870E Tomahawk MAX PZ45GbpsWi-Fi 7Not listed
X870E AORUS PRO X3D4Not listedNot listed18+2+2
B850 Tomahawk MAX45GbpsWi-Fi 7Not listed
B850 Pro RS42.5GbpsWi-Fi 6E14+2+1
X870E CarbonNot listedNot listedWi-Fi 7Not listed

Scroll sideways to see every column.

By price at the time of writing

Prices change often; these tiers reflect Amazon prices when this guide was updated.

Price tierBoards
About $100 to $150B850 Pro RS
About $150 to $250Strix B850-A, B850 Tomahawk MAX
About $250 to $500X870E Tomahawk MAX PZ, X870E AORUS PRO X3D, X870E Carbon

Frequently Asked Questions

Should I fill all four memory slots?

Two sticks usually run faster and more reliably on DDR5. Buy a two-stick kit with the capacity you need.

Do I need PCIe 5.0?

Current graphics cards barely benefit. PCIe 5.0 matters more for the fastest SSDs.

What size motherboard should I buy?

ATX fits most mid-towers and has the most slots. Micro-ATX and Mini-ITX suit smaller cases with fewer expansion needs.

Do I need X870E for gaming?

No. A B850 board runs the same CPUs at the same speed; X870E adds more PCIe 5.0 lanes, USB4 and expansion.

Is built-in Wi-Fi worth it?

Yes if you cannot run a cable. Otherwise wired Ethernet is more consistent.

Will a new board work with my CPU out of the box?

Usually, but check the board's CPU support list. If your chip needs a newer BIOS, BIOS Flashback updates it from a USB drive.

Bottom Line

The ASUS ROG Strix B850-A is the pick for most 9800X3D and 7800X3D builds, and the ASRock B850 Pro RS saves money for the graphics card. The MSI X870E Tomahawk MAX PZ is the X870E step up.

The Gigabyte X870E AORUS PRO X3D, MSI B850 Tomahawk MAX and MSI X870E Carbon are strong alternatives.