XMOS 500 MIPS processor - Sampling frequencies: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 352.8kHz and 384kHz - 16-, 24- and 32-bit resolution - DSD Audio over PCM frames.
My Mac Book Pro (late 2011, i7,8GB RAM) can do--> Basically the performance of the XR-18 ASIO driver seems to be quite similar to the X-USB card of the X32. Comes from the same third party vendor obviously. The difference (PC vs. Mac) in the overall latency is due to the higher security buffer on the Mac. PreSonus AudioBox USB User Manual • Audio applications — 11 • PreSonus Receivers and Amplifiers. Please consult the documentation that came with your audio application for specific instructions on how to select the AudioBox USB driver as the audio-device driver for your software.