All it means is that it hasn't been tested on the chvf-z. Personal preference is GSkill for AMD, but if you are getting a great price I would do it.
Speedbird 9590@5.1/CHVFZ/8gb G Skill@2133/ASUS R9-280X all on EK blocks controlled with Aquaero 6 Pro
Goonybird 8350@4.6/GA990FXAUD3/16gb Corsair@1600/Crossfired Sapphire 7990's cooled with CM 240L XSPC res