AMD’s B650 chipset is the new mainstream option for those looking to rock their new Ryzen 7000 CPUs. With this chipset following the same naming pattern and succeeding B550, what else has changed besides the CPU support? Let’s find out today as we compare AMD B550 vs B650.
Similar Comparison: X670 vs B650
- Both the B550 and B650 are AMD’s mainstream chipsets for their Ryzen lineup.
- Regarding CPU support, the B650 chipset supports AMD’s Ryzen 7000 series (and all Ryzen CPUs until 2025), while the B550 chipset is limited to the Ryzen 3000 and Ryzen 5000 CPUs.
- With the upgrade to Ryzen 7000, B650 also supports DDR5 memory and drops DDR4 support. B550, on the other hand, only supports DDR4.
- B650 motherboards have support for more I/O than B550, including more M.2 slots.
- As of May 2023, entry-level B550 motherboards cost at least $85, while B650 motherboards start at $125. Premium B550 and B650 options can cost up to $300 or beyond.
The BX50 Chipset Lineup
AMD’s B-series chipset lineup is the mainstream chipset for their Ryzen lineup. This chipset lineup has been the option for most users since it supports (at least) one high-end graphics card and one speedy NVMe SSD. It also supports CPU and memory overclocking. The only “downgrade” compared to the enthusiast “XX70” (Read: X570 vs B550) lineup is less bandwidth and, consequently, less I/O. However, the amount of I/O is still plenty for the average user.
The key difference between B650 and B550 is, of course, the CPU support. With Ryzen 7000, AMD has moved to a new socket called AM5. As a result, any older chipsets cannot extend support to these AM5 CPUs. Summing up, the B650 chipset supports Ryzen 7000, while B550 supports Ryzen 3000 and Ryzen 5000 CPUs.
Other than CPU support, the B650 gets the upper hand regarding I/O and memory support, which we will discuss next.
Also Read: B550 Vs X570
B550 Vs B650
Let’s see how the two chipsets compare.
Note: When discussing PCIe lanes (and I/O in general), remember that “up to” refers to a best-case scenario. Using the B650 chipset as an example, it can hold four PCIe 4.0 x4 M.2 lanes ONLY if it sacrifices a PCIe 5.0 x4 slot.
|Socket||AM5 (LGA1718)||AM4 (PGA1331)|
|Supporting Lineups||Ryzen 7000 Series||Ryzen 3000 Series
Ryzen 5000 Series
|Memory Support||DDR5 (Up to 6400 MT/s)||DDR4 (Up to 5400 MT/s)|
|No. of DIMMS per Channel||2||2|
|Chipset Link||PCIe 3.0 x4||PCIe 4.0 x4|
|Chipset PCIe Revisions||PCIe 4.0, PCIe 3.0||PCIe 3.0|
|Total no. of PCIe Lanes||36||30|
|No. of Chipset PCIe 3.0 Lanes||Up to 4||Up to 10
(2 reconfigurable as SATA 6 Gb/s)
|No. of Chipset PCIe 4.0 Lanes||Up to 8||–|
|No. of (Usable) CPU PCIe Lanes||20 (PCIe 4.0)
+ 4 (PCIe 4.0/5.0)
|20 PCIe 4.0|
|No. of M.2 Slots||Up to one PCIe 3.0 x4
Up to four PCIe 4.0 x4
Up to one PCIe 5.0 x4
|Up to one PCIe 4.0 x4
Up to two PCIe 3.0 x4 + one PCIe 3.0 x2
|USB Revisions||USB 3.2, USB 2.0||USB 3.2, USB 2.0|
|Total No. of USB Ports||Up to 16||Up to 12|
|No. of USB 3.2 (20 Gb/s) Ports||Up to 1||N/A|
|No. of USB 3.2 (10 Gb/s) Ports||Up to 10||Up to 6|
|No. of USB 3.2 (5 Gb/s) Ports||Up to 10||Up to 2|
|No. of USB 2.0 Ports||Up to 7||Up to 6|
|SATA 3.0 (6.0 Gb/s) Ports||Up to 4||Up to 6|
|Wi-Fi Support||Wi-Fi 6/ Wi-Fi 6E||Wi-Fi 6/ Wi-Fi 6E|
|RAID Configurations||0/1/10 (NVMe / SATA)||0/1/10 (NVMe / SATA)|
|Supported CPU PCIe Configurations||1×16 + 1×4 OR 2×8 + 1×4||1×16 + 1×4 OR 2×8 + 1×4|
|Thermal Design Power||7 watts||5 watts|
|Launch Date||Oct 4th, 2022||Jun 16th, 2020|
|Starting MSRP (as of May 2023)||$125||$80|
|Best Motherboards||Best B650 Motherboards||Best B550 Motherboards|
B650 vs B550 Comparison Table
Among the similarities between the two chipsets are CPU and memory overclocking support as well as Wi-Fi support. They also support the same RAID configurations. Now let’s dive into the differences between the two.
The socket design is the most notable difference between B650 and B550, which also creates a difference in CPU support. With AMD Ryzen 7000 series, AMD has made the switch to the LGA socket design for the first time. In the LGA design, the contact pins are placed on the CPU, while in PGA, they are located on the motherboard. The LGA design provides more pin density than PGA. You can read our LGA vs PGA comparison to learn more about them.
Also Check: LGA 1200 Vs LGA 1700
Codenamed “AM5“, the B650 motherboards use the LGA1718 socket (it has 1718 pins). Meanwhile, the B550 chipset uses the AM4 socket, a PGA design socket with 1331 pins. Read our AM5 vs AM4 guide to see the detailed comparison of the two sockets.
As briefly discussed above, the key difference between the two chipsets is the CPU support. The B650 chipset enables support for the Ryzen 7000 series CPUs. Furthermore, AMD plans to support this AM5 socket until 2025, so this chipset will support all CPUs released up to 2025. This will likely include the (alleged) Ryzen 8000 series, as well as Ryzen 9000.
In contrast, the B550 chipset is limited to the Ryzen 3000 and Ryzen 5000 series CPUs.
Talking RAM support, the B650 chipset upgrades to DDR5 support and, unlike Intel’s 12th and 13th gen, does not support DDR4. As for transfer speeds, the B650 can facilitate rates of up to 6400 MT/s. As usual, a total of 4 DIMMs are supported, with 2 DIMMs per channel.
When it comes to B550, it supports DDR4 memory with transfer rates up to 5400 MT/s. It also has the same 4 DIMMs support as B650.
Read: DDR4 vs DDR5 Memory
The B650 chipset also upgrades the CPU’s link to the chipset to PCIe 4.0 x4. The B550’s link is 4 lanes of PCIe Gen 3. Consequently, the B650 chipset gets twice the bandwidth for I/O compared to the B550. You can learn about the differences between PCIe 4.0 and PCIe 3.0 in our comparison.
The B650 chipset upgrades PCIe connectivity support as well. The CPU now provides 24 lanes of PCIe 5.0, 16 reserved for a graphics card, and 8 reserved for NVMe configurations. The chipset supports up to 8 lanes of PCIe 4.0 and 4 lanes of PCIe 3.0.
With regard to B550, there are 20 lanes of PCIe 4.0 coming from the CPU, 16 for the GPU and 4 for NVMe (and SATA) configurations. There is also support for up to 10 PCIe 3.0 lanes as far as the chipset lanes are concerned.
Also Read: Z790 vs Z690
In total, the B650 chipset supports up to 36 PCIe lanes, while B550 is limited to 30.
Starting with the USB ports, B650 supports up to 16 USB ports in total. This includes up to 1 USB 3.2 20 Gb/s, 10 USB 3.1 10 Gb/s, and 7 USB 2.0 ports. On the other hand, the B550 chipset supports up to 12 ports overall. Among the 12, there is support for as many as 6 USB 3.2 10 Gb/s, 2 USB 3.2 5 Gb/s ports, and 6 USB 2.0 ports.
B550 does not have USB 3.2 20 Gb/s support. We also have a detailed guide on how to add more USB ports to a PC, in case you currently don’t have enough of them.
SATA 3.0 Ports
Another difference in the B650 vs B550 comparison is in the number of SATA 3.0 ports. B650 motherboards can support up to 4 of these ports, while B550 can run as many as 6. Note that the B550 chipset must sacrifice 2 PCIe lanes to make it 6 ports; otherwise, it’s limited to 4 like its successor.
The two chipsets also differ with respect to the amount of M.2 slots configurable for NVMe SSDs. The B650 chipset supports three PCIe 4.0 x4 M.2 slots from the chipset, plus an additional PCIe 4.0/5.0 x4 (depending on the motherboard). It also has room for 4 lanes of PCIe Gen 3.
B550 motherboards are limited to two PCIe 3.0 x4. It also gets an additional two lanes of PCIe 3.0, but two SATA 3.0 ports must be sacrificed.
Thermal Design Power
Regarding power consumed by the chipset, the B650 has a slightly higher rating at 7 watts. In comparison, the B550 chipset draws 5 watts of power at most.
The price tag is the most important part of our AMD B550 vs B650 comparison. The B550 motherboards, when launched, had a starting MSRP of around $115. However, as of May 2023, you can find entry-level boards for as little as $85, while most mid-range offerings cost between $100-$150. Overall, it’s a pretty affordable option for those looking to run a Ryzen 3000 or Ryzen 5000 CPU. Although, if you plan to step into Ryzen 9 territory, it will be best not to cheap out on the motherboard.
Similar Comparisons: Z690 vs H670 vs B660
As for B650, AMD promised a starting point of $125 for both B650 and B650E boards. This promise wasn’t initially delivered, but at the time of writing this, a few options were available for that very price. Mid-range options start at $170, though. And again, if you’re running a high-end Ryzen 7 or Ryzen 9 CPU, be sure to get a motherboard with decent VRMs.
Premium B550 and B650 motherboards can cost as much as $300 or more.
This marks the end of our AMD B550 vs B650 guide. It’s safe to say that both chipsets serve their primary purpose well: supporting their respective Ryzen CPUs. However, there’s a clear contrast between the B650 and B550 when it comes to I/O support.
Obviously, the one characteristic in terms of I/O that most people will consider is the M.2 slots. The B650 chipset provides more room for M.2 slots, with up to four PCIe Gen 4 x4. B550, on the other hand, only supports one of these lanes, and the rest is all PCIe Gen 3. The B650 motherboards also support more SATA 3 ports and more USB ports.
Again, the main factor to keep in mind is the CPU support. If you’re looking to choose between these two chipsets, you will need to choose B650 if you want to run a Ryzen 7000 CPU. The opposite applies if you’re opting for Ryzen 3000/Ryzen 5000. If you’re looking to upgrade from B550 to B650 for the latest Ryzen support, it’s a pretty good upgrade.
Once you have decided on the chipset, check out our guide on how to choose a motherboard to learn what other factors you should consider. Also, before leaving, do give our Z590 vs B560 comparison a read as well.
Frequently Asked Questions
As of May 2023, B550 motherboards start at $85, while entry-level B650 motherboards cost at least $125. So there’s a fairly significant difference in their prices.
Both the B650 and B550 motherboards are enabled for CPU and memory overclocking. Also, they both (depending on the motherboard) support dual GPUs.
The B650 chipset supports DDR5 memory, making it more future-proof. It will also support all Ryzen CPUs until 2025, as promised by AMD, adding to that future-proofing value.
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