System IO Benchmarks

CrystalDiskMark SATA6G:

CrystalDiskMark M.2:

ixChariot Network Throughput:

The X399 Professional Gaming 's storage performance is excellent, but we expected that as ASRock has always done a nice job tuning M.2 and SATA.

The Zenith Extreme and the X399 Professional Gaming both use the Aquantia AQC107 10Gbit NBase-T NIC, and it does operate near 9400Mbps as it should. Networking performance could be better.

Audio RMAA 5.5:

I disable all audio features, set the correct bitrates, and then test the audio with a loopback test.

Sound Judgment by Ear: Excellent, and just like the Taichi, we see really excellent frequency response, the best for X399 thus far. There are five ratings for audio: 1. Problems, 2. Okay, 3. Acceptable, 4. Very good, 5. Excellent