Create an account to save your builds and preferences, or continue browsing as a guest
Quick Answer
The main difference between B650 and X670 is PCIe lane allocation and USB connectivity. B650 has fewer Gen5 lanes and USB ports but costs $100-200 less. For gaming, B650 is all you need. X670 only makes sense for multiple Gen5 NVMe SSDs or extensive USB peripherals.
| Feature | B650 | X670 |
|---|---|---|
| PCIe Gen5 GPU slot | Yes (1x) | Yes (1x) |
| PCIe Gen5 M.2 slots | 0-1 | 1-2 |
| Total PCIe Gen4 M.2 | 2-3 | 3-4 |
| USB 3.2 Gen2 ports | 2-4 | 4-8 |
| USB4 support | Rare | Common on X670E |
| CPU overclocking | Yes | Yes |
| Price range | $150-250 AUD | $280-500 AUD |
Gaming uses one GPU slot (Gen5 on both) and one M.2 SSD. B650 handles this perfectly. The extra lanes on X670 provide zero gaming benefit. Every dollar saved on the motherboard can go toward a better GPU.
The "E" variants guarantee a Gen5 M.2 slot. Standard B650/X670 may or may not have one depending on the specific board. For gaming, a Gen4 NVMe SSD shows no difference versus Gen5, making the E variants unnecessary.
Our Verdict
B650 is the right choice for gaming builds. Save $100-200 versus X670 and invest it where it matters: GPU, CPU, or RAM. X670 is only justified for workstation users who need maximum connectivity.