(NZXT PM Sharing Fractal Case Features
You can check out this video to get a decent sense of the radiator space up top.
Fractal's website discusses the potential radiator thickness, it is assumed these measurements have already accounted for the fan. This assumption can be confirmed as per the video showing an H100 in push-pull totalling 77mm is hovering just barely over the DIMM.
*The component support in the case when using radiator in top is depending on the thickness of the radiator. See info below. When having a 2x120mm radiator mounted in top, you cannot use the rear 120mm fan slot at the same time.
- Up to 40mm radiator thickness: Support for most water CPU coolers and larger memory modules.
- Up to 50mm radiator thickness: Support for most water CPU coolers and standard memory modules with a height of max 40mm.
- Up to 70mm radiator thickness: Support for only certain water CPU coolers, depending on the water inlet and outlet. Supports standard memory modules with a height of max 40mm.