Cinebench
We used the ‘CPU’ test built into Cinebench R15 .
Handbrake Conversion
We measured the average frame rate achieved for a task of converting a 1.23GB 1080P game recording using the High Profile setting and MP4 container.
7-Zip
We manually archive a 1.23GB MP4 game recording to test the performance in 7-Zip.
Asus' Maximus VIII Impact has no trouble keeping pace with ATX competitors in Cinebench and Handbrake tests. The mITX board actually manages to share the performance lead with Gigabyte's Z170X-Gaming 7 in Cinebench.
7-Zip performance is little below the typical numbers displayed by competitors. This is likely related to the reduced memory capacity and number of DIMMs that the Maximus VIII Impact was forced to use.