To test the USB 3.0 ports on the Blackfire Hammerhead, I plugged in an OCZ Trion 150 SSD via a SATA-to-USB 3.0 5Gbps adapter, which uses the ASMedia ASM1053 controller. We reviewed the SSD HERE, finding it delivers good speed at a budget price.
Most importantly, it is capable of saturating the USB 3.0 bus, allowing us to test the speeds the USB 3.0 ports deliver. To test this, I ran both CrystalDiskMark and ATTO Disk Benchmark on the Trion 150 drive.
As expected, speeds of around 400 MB/s indicate no issues with the USB 3.0 ports.
The X370 mobo would have been a good choice if the PSU could handle crossfire. The CPU is also a bit on the edge for crossfire – a 1600 or 1600X would have cut it imo. Then again, those two things would have driven up the price. I have to agree that a B350 mobo would have been the best choice.