A special motherboard requires a special water block, so the tradition with monoblocks for ROG RAMPAGE series motherboards continues. EK Water Blocks, is releasing new LGA-2066 socket based monoblocks... EK Adds monoblocks for ASUS ROG Rampage VI Extreme & Apex
Not sure how I feel about that line on the top of the G 1/4 threads of the black block. Doesn't seem to carry on well as if it's an imperfection in production.
Pretty sure that's just the aluminium cover on the acetal version. Its to cover up the leds and make it look better.