Buying Guide
The Best Motherboards for Developers
Five motherboards compared, from the PRO B850-P to the X870 Pro-A, with the trade-offs of each named.
By The PC Journal editorial team
12 min read5 products evaluated
A developer workstation benefits from fast Wi-Fi, 2.5GbE or better and room for several SSDs. Every pick has Wi-Fi 7 and cost $300 or less.
Our comparison rests on published figures for M.2 slots, wired LAN and wi-Fi; where a maker leaves out M.2 slots, we say so, and no figure here comes from our own testing.
Quick Picks
Our 5 recommendations at a glance. Tap a pick for the full verdict.
Fastest Wired Network Speed
MSI PRO B850-P WiFi
The fastest wired network speed here (5Gbps).
Best for: Buyers who put wired network speed first.
Our take Check price for MSI PRO B850-P WiFi (opens in a new tab)
Also Consider
ASRock B850M Steel Legend WiFi
A PCIe 5.0 M.2 slot.
Best for: Buyers who want PCIe 5.0 M.2 slot.
Our take Check price for ASRock B850M Steel Legend WiFi (opens in a new tab)
Most M.2 Slots
ASRock B850 Steel Legend WiFi
The most M.2 slot count here (4).
Best for: Buyers who put M.2 slot count first.
Our take Check price for ASRock B850 Steel Legend WiFi (opens in a new tab)
Strong Alternative
ASRock X870 Steel Legend WiFi
Memory support to DDR5-8000 (OC).
Best for: Buyers who want memory support to DDR5-8000 (OC).
Our take Check price for ASRock X870 Steel Legend WiFi (opens in a new tab)
Worth a Look
ASRock X870 Pro-A WiFi
Two rear USB4 Type-C ports.
Best for: Buyers who want two rear USB4 Type-C ports.
Our take Check price for ASRock X870 Pro-A WiFi (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| The fastest wired network speed here (5Gbps). | Buyers who put wired network speed first. | Check price for MSI PRO B850-P WiFi (opens in a new tab) |
| A PCIe 5.0 M.2 slot. | Buyers who want PCIe 5.0 M.2 slot. | Check price for ASRock B850M Steel Legend WiFi (opens in a new tab) |
| The most M.2 slot count here (4). | Buyers who put M.2 slot count first. | Check price for ASRock B850 Steel Legend WiFi (opens in a new tab) |
| Memory support to DDR5-8000 (OC). | Buyers who want memory support to DDR5-8000 (OC). | Check price for ASRock X870 Steel Legend WiFi (opens in a new tab) |
| Two rear USB4 Type-C ports. | Buyers who want two rear USB4 Type-C ports. | Check price for ASRock X870 Pro-A WiFi (opens in a new tab) |
Our Picks
Fastest Wired Network Speed1 of 5
MSI PRO B850-P WiFi on Amazon (opens in a new tab)
The PRO B850-P keeps Wi-Fi 7 and 5Gbps LAN on a budget board, with tool-free M.2 clips.
Best for
- Buyers who put wired network speed first.
Skip if
- Choose another pick if you can't accept this: m.2 slot count of 3, behind the B850 Steel Legend (4).
Why we like it
Three M.2 slots are enough for most gaming builds. It matches the B850M Steel Legend on M.2 slot count (3). Its 5Gbps wired network speed is the fastest here; the B850M Steel Legend comes next at 2.5Gbps.
You also get 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. No other pick here cost less at our last price check, and the B850M Steel Legend was closest.
Key dimensions & specs
- M.2 slots: 3
- Wired LAN: 5Gbps
- Wi-Fi: Wi-Fi 7
- Form factor: ATX
- Socket: AM5
Pros
- 5Gbps wired Ethernet
- Wi-Fi 7 built in
- PCIe 5.0 graphics slot
- Tool-free EZ M.2 clips
Cons
- M.2 slot count of 3, behind the B850 Steel Legend (4)
Also Consider2 of 5
ASRock B850M Steel Legend WiFi on Amazon (opens in a new tab)
The B850M Steel Legend fits a 12+2+1 layout, Wi-Fi 7 and three M.2 slots, one of them PCIe 5.0, onto a Micro-ATX board.
Best for
- Buyers who want PCIe 5.0 M.2 slot.
Skip if
- Skip it if M.2 slot count matters most to you; the B850 Steel Legend offers 4.
Why we like it
It is the Micro-ATX pick with the most features here. On M.2 slot count it ties with the PRO B850-P at 3. On wired network speed it ties with the B850 Steel Legend and the X870 Pro-A at 2.5Gbps.
12+2+1 power stages is unique to it among these picks, while the B850 Steel Legend uses 14+2+1 power stages. You also get BIOS Flashback and a white and silver finish. 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.
Its price falls between the PRO B850-P and the B850 Steel Legend, based on our last check. If M.2 slot count is your priority, the B850 Steel Legend (4) is the stronger choice.
Key dimensions & specs
- M.2 slots: 3
- Wired LAN: 2.5Gbps
- Wi-Fi: Wi-Fi 7
- Power stages: 12+2+1
- Form factor: Micro-ATX
- Socket: AM5
- Chipset: B850
Pros
- Wi-Fi 7 built in
- PCIe 5.0 M.2 slot
- BIOS Flashback
- White and silver finish
Cons
- M.2 slot count trails the B850 Steel Legend (4)
- Costs more than the PRO B850-P at the time of writing
Most M.2 Slots3 of 5
ASRock B850 Steel Legend WiFi on Amazon (opens in a new tab)
The B850 Steel Legend pairs four M.2 slots with a PCIe 5.0 M.2 slot and a white finish.
Best for
- Buyers who put M.2 slot count first.
Skip if
- Skip it if price comes first: the PRO B850-P cost less when we checked.
Why we like it
It fits light-themed builds that still need plenty of storage. Nothing else here matches its 4 M.2 slot count; the PRO B850-P comes closest at 3. It matches the B850M Steel Legend and the X870 Pro-A on wired network speed (2.5Gbps).
Like the X870 Steel Legend, it has 14+2+1 power stages, while the B850M Steel Legend uses 12+2+1 power stages. 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. It was priced above the B850M Steel Legend and below the X870 Steel Legend at the time of writing.
Key dimensions & specs
- M.2 slots: 4
- Wired LAN: 2.5Gbps
- Wi-Fi: Wi-Fi 7
- Power stages: 14+2+1
- Form factor: ATX
- Socket: AM5
Pros
- 4 M.2 slots for SSD expansion
- Wi-Fi 7 built in
- 14+2+1 power stage layout
- PCIe 5.0 M.2 slot
Cons
- Costs more than the PRO B850-P at the time of writing
Strong Alternative4 of 5
ASRock X870 Steel Legend WiFi on Amazon (opens in a new tab)
The X870 Steel Legend brings USB4, Wi-Fi 7 and a 14+2+1 layout to one of the lowest X870 prices.
Best for
- Buyers who want memory support to DDR5-8000 (OC).
Skip if
- Skip it if you need to know its M.2 slot count before buying; the maker doesn't publish one.
Why we like it
The maker doesn't state its M.2 count, so check the manual. Like the B850 Steel Legend, it has 14+2+1 power stages, while the B850M Steel Legend uses 12+2+1 power stages. It shares an X870 chipset with the X870 Pro-A; the B850M Steel Legend goes with a B850 chipset.
It also offers memory support to DDR5-8000 (OC) and a white and silver finish. 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. If you want a confirmed M.2 slot count, look to the B850 Steel Legend instead: it offers 4, while this one gives no figure.
Key dimensions & specs
- Wi-Fi: Wi-Fi 7
- Power stages: 14+2+1
- USB4: Yes
- Form factor: ATX
- Socket: AM5
- Chipset: X870
Pros
- Wi-Fi 7 built in
- 14+2+1 power stage layout
- USB4 ports on the rear panel
- Memory support to DDR5-8000 (OC)
Cons
- No published M.2 slot count
- No published wired network speed
- Costs more than the PRO B850-P at the time of writing
Worth a Look5 of 5
ASRock X870 Pro-A WiFi on Amazon (opens in a new tab)
The X870 Pro-A stands out for two rear USB4 Type-C ports, and it adds memory support to DDR5-8000 (OC).
Best for
- Buyers who want two rear USB4 Type-C ports.
Skip if
- Its M.2 slot count is not published, which rules it out if you need that number.
Why we like it
It also offers a 2.5Gbps wired network speed. It has a 16+2+1 phase VRM, one PCIe 5.0 x16 slot and a Gen5 M.2 slot. DDR5 is supported up to 8,000+ with overclocking.
On wired network speed it ties with the B850M Steel Legend and the B850 Steel Legend at 2.5Gbps. You get 16+2+1 power stages here, which sets it apart from the B850 Steel Legend and its 14+2+1 power stages. Like the X870 Steel Legend, it has an X870 chipset, while the B850M Steel Legend uses a B850 chipset.
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. The maker doesn't give its M.2 slot count; if that figure matters, the B850 Steel Legend offers 4.
Key dimensions & specs
- Wired LAN: 2.5Gbps
- Wi-Fi: Wi-Fi 7
- Power stages: 16+2+1
- USB4: Yes
- Form factor: ATX
- Socket: AM5
- Chipset: X870
Pros
- Wi-Fi 7 built in
- 16+2+1 power stage layout
- USB4 ports on the rear panel
- Two rear USB4 Type-C ports
Cons
- No published M.2 slot count
- Wired network speed trails the PRO B850-P (5Gbps)
- Costs more than the PRO B850-P at the time of writing
How We Chose These Motherboards for Developers
Each pick was assessed across 4 criteria weighted for real-world use.
- Power delivery
- We noted power stage layouts where the maker lists them.
- Connectivity
- We compared Wi-Fi, wired LAN speed and USB4.
- Platform
- We checked socket, chipset and form factor from each listing.
- Storage
- We counted listed M.2 slots and PCIe 5.0 support.
What to Look for in a Motherboard for Developers
Key buying criteria so you get the right fit the first time.
Where these picks differ: wired network speed
Among these picks, wired network speed runs from 2.5Gbps on the X870 Pro-A to 5Gbps on the PRO B850-P. Settle how much you need before comparing prices, since paying for more rarely helps if your use never reaches it.
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.
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.
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.
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.
How to Choose a Motherboard for Developers
By priority
| Priority | Consider | Why |
|---|---|---|
| Buyers who put wired network speed first | PRO B850-P | The fastest wired network speed here (5Gbps) |
| Buyers who want PCIe 5.0 M.2 slot | B850M Steel Legend | A PCIe 5.0 M.2 slot |
| Buyers who put M.2 slot count first | B850 Steel Legend | The most M.2 slot count here (4) |
| Buyers who want memory support to DDR5-8000 (OC) | X870 Steel Legend | Memory support to DDR5-8000 (OC) |
| Buyers who want two rear USB4 Type-C ports | X870 Pro-A | Two rear USB4 Type-C ports |
Scroll sideways to see every column.
Key specs side by side
Figures as each maker states them.
| Board | M.2 slots | Wired LAN | Wi-Fi | Power stages |
|---|---|---|---|---|
| PRO B850-P | 3 | 5Gbps | Wi-Fi 7 | Not listed |
| B850M Steel Legend | 3 | 2.5Gbps | Wi-Fi 7 | 12+2+1 |
| B850 Steel Legend | 4 | 2.5Gbps | Wi-Fi 7 | 14+2+1 |
| X870 Steel Legend | Not listed | Not listed | Wi-Fi 7 | 14+2+1 |
| X870 Pro-A | Not listed | 2.5Gbps | Wi-Fi 7 | 16+2+1 |
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 tier | Boards |
|---|---|
| About $100 to $150 | PRO B850-P, B850M Steel Legend |
| About $150 to $250 | B850 Steel Legend, X870 Steel Legend, X870 Pro-A |
Frequently Asked Questions
Which pick leads on M.2 slot count?
The B850 Steel Legend leads at 4, ahead of the PRO B850-P at 3; the B850M Steel Legend sits at the other end with 3.
Which pick costs the least here?
That was the PRO B850-P at our last check; if you can stretch, the B850M Steel Legend is the next step up and the X870 Pro-A the priciest.
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.
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
Our first pick is the PRO B850-P, chosen for the fastest wired network speed here (5Gbps). Look at the B850M Steel Legend for a PCIe 5.0 M.2 slot, the B850 Steel Legend for the most M.2 slot count here (4) and the X870 Steel Legend for memory support to DDR5-8000 (OC) if those matter more to you.
Buy a board with a BIOS flashback button so you can update firmware without a working CPU.