HPTX Ice is the largest case in the series. It's designed for motherboards of nearly any shape an size, be it longer EATX, taller XL-ATX, or a combination of both – HPTX. The extra room can be used for pretty much anything your imagination comes up with – large cooling assemblies, large storage arrays, large liquid reservoirs or radiators, etc. This tank measures 230 x 559 x 613 mm (W x H x D), weighing in at 8.9 kg.
As large as it seems, this case has the same number of 5.25-inch bays as the EATX Ice – five. Then there's the usual 200 mm fan intake. On the top, there are two 120 mm fan exhausts, again just like the EATX Ice.
Now we're talking. Just look at that tray, peppered with mount holes, large cutouts, and valved cutouts. Like with the EATX Ice, this case has split 3.5-inch/2.5-inch drive bays. The stack closest to the front intake consists of two sets, the top one has three bays, the one below has four, among which the bottommost bay is natively 2.5-inch capable. The top movable set can be reattached next to the PSU bay at the bottom, making room for…I don't know…an expansion card the length of a kid's Cricket bat?
To be XL-ATX capable, a case needs to have at least ten expansion slot bays. This case meets that basic requirement. The rest of the rear panel is just that – basic. Cubitek could have easily added more valved holes for liquid cooling tubing.