Disclosure: we earn a commission when you buy through links on this page, at no extra cost to you. Build recommendations on this page are generated by AI from a compatibility-checked parts catalog, and prices are estimates.
B550 vs B650: last-gen value against the current platform
Updated Oct 25, 2026. Prices come from our catalogue and may have changed.
B550 boards cost less than B650 boards, $100 against $150 at the median in our catalogue. They use cheaper DDR4 memory, but they stop at Ryzen 5000 CPUs, the last generation for socket AM4. B650 boards use socket AM5 with DDR5 memory and support Ryzen 7000, 8000 and 9000 CPUs, with new Ryzen chips coming to AM5 through 2029. DDR5 also costs more than DDR4, so the real gap is wider than the board price alone. Pick B550 to build cheaply now with a Ryzen 5000 CPU. Pick B650 for a socket with more CPUs still to come.
Key differences
| Criterion | B550 | B650 |
|---|---|---|
| Median price in our catalogue | $100 | $150 |
| CPUs it supports | Ryzen 5000, 4000 and 3000 desktop CPUs on socket AM4, the last generation released for that socket | Ryzen 9000, 8000 and 7000 desktop CPUs on socket AM5, with more Ryzen generations planned |
| Memory | DDR4 only | DDR5 only |
| PCIe from the CPU | PCIe 4.0 for the graphics slot and the primary M.2 slot | PCIe 4.0 for the graphics slot, and PCIe 5.0 on the primary M.2 slot on roughly half the boards we carry |
| PCIe from the chipset itself | PCIe 3.0 lanes for extra slots and ports | PCIe 4.0 lanes for extra slots and ports |
| Platform upgrade path | Closed. AM4 has not received a new CPU generation since Ryzen 5000 | Open. AMD has committed to new Ryzen CPUs on socket AM5 through 2029 |
| Storage and connectivity on the boards we carry | Usually one or two M.2 slots and four to eight SATA ports, and WiFi is often missing on cheaper boards | Usually three M.2 slots and four to six SATA ports, and WiFi 6E is common |
| Total platform cost | Cheaper board plus cheaper DDR4 memory, so the lowest total cost for a new build | Higher board price plus a DDR5 memory premium, so the real gap is wider than the board price alone |
Prices in our catalogue today
| Price | B550 | B650 |
|---|---|---|
| Cheapest | $70 | $117 |
| Median | $100 | $150 |
Choose B550 if…
- You want the lowest total cost for a new PC with a Ryzen 5000 CPU.
- You already own a Ryzen 5000, 4000 or 3000 CPU and DDR4 memory, which a B650 board cannot use.
- You do not plan to upgrade the CPU beyond Ryzen 5000.
Choose B650 if…
- You want a Ryzen 7000, 8000 or 9000 CPU on the current AM5 platform.
- You want to upgrade the CPU later, since AMD has promised new Ryzen CPUs on AM5 through 2029.
- Your budget covers pricier DDR5 memory on top of the board.
Best value B550
- MSI MPG B550 Gaming PlusNo longer available
A no-frills ATX board with two M.2 slots and six SATA ports.
- GIGABYTE B550M K$75 at Newegg
An affordable B550 board from a well-known brand, still with four RAM slots and two M.2 slots.
- Asus Prime B550M-A$118 at Newegg
Built-in WiFi 6 in a compact Micro ATX size, a tidy pick for a Ryzen 5000 PC.
Best value B650
- GIGABYTE B650 AORUS Elite$160 at Newegg
A well-equipped ATX board with three M.2 slots and built-in WiFi 6E.
- GIGABYTE B650 Eagle$140 at Newegg
An affordable B650 board that still has three M.2 slots and WiFi 6E, a good entry point to AM5.
- Asus TUF Gaming B650-PLUSNo longer available
Adds USB4 and stronger power delivery, with room for a higher-end Ryzen CPU later.
Cheapest B550 parts
- ASRock B550M-HDV$70 at Newegg
- GIGABYTE B550M K$75 at Newegg
- ASRock B550M Phantom Gaming 4$80 at Newegg
Cheapest B650 parts
- GIGABYTE B650M Gaming Plus WiFi$117 at Newegg
- ASRock B650M-HDV/M.2 White$120 at Newegg
- GIGABYTE B650M D3HP AX$130 at Newegg
Frequently asked questions
Can I put a Ryzen 9000 CPU in a B550 motherboard?
No. B550 uses socket AM4, and Ryzen 9000 CPUs use the newer socket AM5, the same socket as B650. The two sockets are physically different, so a Ryzen 9000 CPU does not fit or work in a B550 board.
Is B550 or B650 better for gaming?
The chipset itself does not change gaming speed. The CPU and graphics card do. B550 pairs with Ryzen 5000 CPUs that still play games well, while B650 takes the newer Ryzen 7000, 8000 and 9000 CPUs, which are faster and leave room to upgrade.
Do I need DDR5 memory for a B650 motherboard?
Yes. Every B650 board takes DDR5 memory only. If you already own DDR4 memory, it will not work in a B650 build, so add that memory cost when you compare the two platforms.
Is it worth upgrading from a B550 build to B650?
Only if you also plan to change the CPU. A B650 board needs a Ryzen 7000, 8000 or 9000 CPU and DDR5 memory, neither of which works with a B550 setup. If your current Ryzen 5000 CPU still meets your needs, there is little reason to switch.
What is the real difference between B550 and B650?
B550 is the AM4 chipset built around DDR4 memory and Ryzen 5000 and earlier CPUs, with PCIe 4.0 from the CPU and PCIe 3.0 from the chipset. B650 is the AM5 chipset built around DDR5 memory and Ryzen 7000 and newer CPUs, with PCIe 4.0 on the graphics slot, PCIe 5.0 on some M.2 slots, and PCIe 4.0 from the chipset itself.
Will B550 motherboards ever get a newer CPU?
No new one is planned. Ryzen 5000 was AMD's last CPU generation for socket AM4, which B550 uses. AMD has moved every newer Ryzen generation to socket AM5, the socket that B650 and other AM5 chipsets use instead.
Sources
More comparisons
Builds that use this
Describe your own needs and budget, and get three compatibility-checked builds in minutes.