Best answer: The NZXT H1 PC case will fit AMD and NVIDIA GPUs of up to 305 mm in length and 128 mm for width.
Go big but small
With more compact Mini-ITX cases, you’re more restricted in what components will fit inside the chassis. Motherboards need to be of a certain size or else they won’t fit, likewise with the GPU. Saving on available space means you need to be more selective with the parts you purchase.
The NZXT H1 allows for GPUs of up to 305 mm in length and 128 mm width. These dimensions are actually very good for a Mini-ITX case and should fit most GPUs on the market. Even the excessively large ZOTAC AMP! Extreme cards can almost fit inside the case but are let down by the huge coolers.
So long as your GPU (or the one you have in mind to pick up) is less than 305 mm long and 128 mm wide, it’ll fit. And how the NZXT H1 is designed with the GPU in mind means you won’t be suffocating the GPU, so blowers and open-air coolers are both okay. The panel also has a dust filter to help keep whichever card you end up using clear of dust.
If you need some GPU ideas we have a couple listed below — an AMD one and an NVIDIA one.
Compact PC case with bags of potential
The H1 from NZXT may seem rather expensive, but for the price, you not only get a high-quality Mini-ITX case, but also a preinstalled 650W PSU and AIO cooler.