Review: NZXT Kraken Z63 and Z73 are among the best AIO coolers out there
Source: Rich Edmonds / Windows Central
There’s no shortage of all-in-one (AIO) CPU water coolers, but NZXT has always been among the top-rated in terms of design and performance. Instead of relying on simply air to cool down your CPU, an AIO utilizes a liquid to transfer heat from the processor to a radiator, which has fans attached to it to dissipate.
Compared to traditional air coolers, these are an excellent middle-ground between them and an all-out custom water-cooling loop. The new Kraken Z63 and Z73 take everything to the next level with a new LCD display, plenty of headroom with a 280mm or 360mm radiator, improved pump design, and support for the much-improved CAM software.
The Beast
NZXT Kraken Z73
Bottom line: The latest Asetek pump matched with a new LCD display and large 360mm radiator make this one of the best AIO coolers around.
Pros
- Excellent cooling performance
- Intel and AMD support
- OLED display
- Quiet Asetek pump
- Large 360mm radiator
Cons
- Pricey
- CAM being CAM
NZXT Kraken Z63 and Z73 tech specs
There’s very little to differentiate the Z63 and Z73 aside from the radiator size and amount of fans included. The rest of the specifications are identical.
Category | NZXT Kraken Z63 | NZXT Kraken Z73 |
---|---|---|
Radiator | 280mm Aluminum |
360mm Aluminum |
Fans | 2x Aer P140 | 3x Aer P120 |
Pump Block | Asetek pump Copper, plastic |
Asetek pump Copper, plastic |
Intel Sockets | LGA 1151 LGA 1150 LGA 1155 LGA 1156 LGA 1366 LGA 2011 LGA 2011-3 LGA 2066 |
LGA 1151 LGA 1150 LGA 1155 LGA 1156 LGA 1366 LGA 2011 LGA 2011-3 LGA 2066 |
AMD Sockets | AM4 TR4 |
AM4 TR4 |
Software | NZXT CAM | NZXT CAM |
Warranty | 6 years | 6 years |
You’ll appreciate the new pump and LCD display
The Kraken Z73 is perfect for exquisite PC builds with powerful CPUs.
This extended surface area allows for more heat to be transferred from the radiator to the airflow within the PC case, and the extra fan adds to the volume of gas that can be pushed through. While the Z63 may be more than enough for even more demanding processors, the Kraken Z73 is for entering enthusiast territory.
The Kraken Z series, most notably the Z73, is designed for those who are looking to cool anything up to a Threadripper processor, which can throw out plenty of heat when put under stress. Compared to the Kraken X series, NZXT has swapped out the RGB lights on the CPU block for an LCD display. There’s also the new 7th-gen Asetek pump unit.
Source: Rich Edmonds / Windows Central
In order to get the most out of the Kraken Z63 and Z73, you need to have NZXT’s CAM software installed. This piece of kit has been lambasted in the past from the community for shipping to NZXT PC statistics and other data, being sluggish to use and downright unreliable.
The most recent version has improved dramatically, though we weren’t able to get CAM to play ball with either of our Kraken review samples. (The joys of using pre-release builds.) Still, with the software and AIO installed, you can control fan speeds, as well as what’s displayed the LCD display. Still, even though I wasn’t able to Rick Roll the AIO, performance could still be measured.
Excellent cooling performance
With the rather large 280mm and 360mm radiator setup for the Z63 nd Z73, NZXT has been able to largely distance itself from such problems. Our testing setup included the following hardware:
The AMD Ryzen 9 3900X is a powerful 12-core CPU with plenty of performance available, Running a stress test with this capable processor installed is quite the challenge for even the largest air cooler to keep within optimal operating temperature ranges. The GTX 1070 is an older card, but the ZOTAC AMP! Extreme is essentially silent at idle, likewise with the Cosair VS550 PSU.
There’s plenty of water-cooling with very little noise from the three fans.
What was more interesting was the lack of noise emanating from the pump and block combo unit and the three fans attached to the 360mm radiator. I had to double-check that the fans were indeed spinning, as was reported by software readings. Playing Stellaris (late game where it really tasks your processor) saw temperatures hover between 42C (108F) and 46C (115F) when stable.
The Z63 is a similar story. Idle with the Ryzen 9 3900X was reported at 27C (81F), which largely falls into the margin of error and, as such, can be considered equal to the Z73. The same tests performed showed the AO with a smaller radiator and less airflow struggle a little to keep 12-core CPU in line with its larger sibling. Temperatures hit 58C (136F), which still isn’t high by any means.
Category | NZXT Kraken Z63 | NZXT Kraken Z73 |
---|---|---|
Idle | 26C 79F |
27C 88F |
Stress test | 50C 122F |
58C 136F |
Gaming | 44C 111F |
49C 120F |
What you might dislike about the NZXT Kraken Z63 and Z73
Source: Rich Edmonds / Windows Central
While you could run the Z63 and Z73 without CAM, you shouldn’t. You’re not only paying a premium for the performance, design, and warranty, but also that sweet new LCD display, which requires the software to configure. CAM is also still Windows-only.
Should you buy the NZXT Kraken Z63 or Z73?
Source: Rich Edmonds / Windows Central
The Z63 is a great choice for a similar processor range, though if you partner it up with power-hungry CPUs, be prepared to see a slight increase in temperature and noise from fan curves. NZXT nailed the design of the Kraken coolers, and this latest family of Z AIOs do nothing but improve the aesthetics of any PC build, thanks to the LCD display. Forget RGB lighting. Addressable displays are where it’s at in 2020.
The Z73 is overkill for lower-powered processors, but really if you’re all about low noise, a clean install, and reliable software support, this is a worthy upgrade to your aging air cooler. There’s very little to dislike, aside from the price, and CAM can still be a slight pain to use. Overall, the Kraken Z73 is among the best AIO coolers you can buy. The same goes for the Z63.
The Beast
NZXT Kraken Z73
Pricey but well worth it
The NZXT Kraken Z73 is an expensive cooler. There are no two ways about that. But should you want a smart-looking AIO that can handle even overclocked 12-core processors, this is it.
Smaller Monster
NZXT Kraken Z63
Slightly more affordable
The NZXT Kraken Z63 has everything the larger Z73 sibling has, but comes with a slightly smaller radiator and one less fan, but does slash the price considerably.
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