Four More Closed-Loop Liquid Coolers Take On The NH-D14

NZXT Kraken X40

Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

NZXT was the impetus for today’s follow-up comparison, as its products showed up a little too late for our previous round-up. Among these were the Kraken X60, which doesn't fit any of our recently-reviewed cases, and the Kraken X40 tested today.

The X40 is NZXT’s single-fan alternative to the double-width X60. Both products are equipped with the company’s low-noise 140 mm fan. Unfortunately, most cases that support dual 140 mm coolers still don’t have enough space above the motherboard for a radiator in that location. However, most modern performance-oriented cases do have a 140 mm exhaust fan, so the single-width X40 simply mounts in this location.

NZXT diverges from the familiar Asetek design of several competitors by equipping the X40 with software fan controls via a USB header. Meanwhile, pump and fan power is still supplied by the CPU’s fan connector.

Asetek-supplied mounting brackets remain, though. Dual-position spacers select between either LGA 1155/1156 or LGA 1366/2011 spacing. The alternative AMD installation kit replaces a motherboard’s original four-screw (or pin) bracket.

Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.