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Can you replace the pre-installed AIO inside NZXT H1?

NZXT H1
NZXT H1 (Image credit: Rich Edmonds / Windows Central)

Can you replace the pre-installed AIO inside NZXT H1?

Best answer: The NZXT H1 uses a standard 140 mm AIO water-cooling solution, which can be replaced by an aftermarket kit, so long as the tubing will be fine in the cramped space. It's not recommended to do so, however, unless you know everything will fit.Small and mighty case: NZXT H1 (opens in new tab) ($350 at Amazon)

Fit an appropriate AIO or low-profile air cooler

The NZXT H1 comes equipped with a 140 mm AIO water cooler that will be able to handle even the high-end desktop-class processors, including the Intel Core i9 and AMD Ryzen 9 series. Should you want to replace it with an aftermarket solution, it's better to go with another AIO, though a low-profile air blower will work too.

When looking for a replacement AIO, it's important to consider the tubing. The H1 is a super-compact chassis and there's not a whole lot of clearance between the CPU and the case panel. The AIO included with the H1 is designed around this problem by using 90-degree rotating fittings on the radiator as well as the cooling block. Most AIOs do not have 90-degree rotators on the radiator.

It's worse for low-profile coolers. You'll want a decent enough blower, but you're restricted to around 65 mm of clearance if using a case fan in place of the AIO radiator. Our advice? Use the included AIO or if it ceases to work and is out of warranty, purchase a replacement from NZXT.

Rich Edmonds
Senior Editor, PC Build

Rich Edmonds is Senior Editor of PC hardware at Windows Central, covering everything related to PC components and NAS. He's been involved in technology for more than a decade and knows a thing or two about the magic inside a PC chassis. You can follow him over on Twitter at @RichEdmonds.