ASRock has been one of the few motherboard vendors to focus on mini-PCs targeting the HTPC and portable gaming markets. Starting from the ION-based nettop days, they have consistently refreshed the mini-PC lineup in sync with Intel's product cycle. We have been reviewing members of their CoreHT lineup (rechristened as VisionHT last year) since the Arrandale days, but today, we are focusing on their gamer-targeted mini-PCs. The VisionX lineup marked the departure from NVIDIA to AMD for the discrete GPU component, and their Haswell version, the VisionX 420D combines a Core i5-4200M with an AMD Radeon R9 M270X. Read on to see how the mini-PC fares under both gaming and HTPC workloads.