It was installed together with a Fractal Design Celsius 240 on a Gigabyte RTX 2080.
Flawless performance in intense gaming, reaching a maximum of 56 degrees, while idle at around 30.
I highly recommend it without hesitation!!!

It was installed with a Cryorig A40 Ultimate on an RX480 Nitro and with the cooler in a push-pull configuration. At idle room temperature!!! It dropped from a maximum of 75C to 35C. With stock timings. Memory and VRMs at a maximum of 40C. I didn't expect such temperatures! Flawless.

First impressions easy installation and with the use of a good paste in combination with a double radiator in the most demanding games you had 70 to 80 degrees Celsius, you don't see anything above 45 degrees Celsius. The combination I have is Kraken X53 and Arctic Silver 5 and it did not disappoint me.

Very good idea to connect your AIO cooler with your graphics card. The G12 attaches quite easily to the card, in my case the GTX 1080 Aorus, but they should explain that if you have a full tower, you have to be lucky for the project to work due to the length of the tubes. I had to struggle and it barely fit as you can see in the photo, but one of the two tubes is stretched tight as they didn't reach neither the top nor the front. This is not a problem with the G12 itself, but the way it forces you to attach the pump on the bracket causes the tubes to lose a significant part of their length. It took me a few hours to study the installation and troubleshoot. As a result, I have 15 degrees lower temperature in various scenarios

Despite my doubts, it works very well.

The fan is there to cool down the motherboard and it does it very well.

The graphics card temperature dropped from 90+ degrees Celsius to 55-60 degrees and I haven't seen it go above 60 degrees again. Even now in the summer when the room temperature can be 30+

Quality construction, beautiful design, I would prefer if it didn't have the NZXT logo but plain. Relatively easy installation.

It is the ultimate tool for graphics cards that have temperature issues. It was used with thermaltake water 3.0 extreme S on gtx 1060 3gb. The temperature dropped from 76 degrees to 37. The fan noise, which sounded like a helicopter, and the GPU values forced me to make this choice and I highly recommend it.
P.S: The official nzxt website has the compatible graphics cards and coolers. So make sure it suits you.
P.S2: Opening the graphics card voids the warranty if it is still valid. Therefore, I would recommend it for buyers with cards close to expiration or after the warranty.

If you want a cheap solution for graphics card cooling, you don't need to look elsewhere, the installation is very easy and you see results immediately. Specifically, I saw a difference of about 25 degrees on my Gygabite RX480.

I combined it with an old x41 (140mm) on a 1080ti. Before, with "aggressive" fan settings (90%), it would reach up to 70c and 1975mhz. Now, with 1/3 of the noise, the temperature stays around 48-50c and 2070mhz. The memory is at 6200Mhz, without any heatsink. The water temperature of the cooler rises to 45 (quite warm to the touch - I have an open air bench so I frequently touch it), so maybe with a larger AIO, I could achieve even better temperatures.
Update: I changed the AIO to x61 (280mm) and now with stock settings (1924mhz), it reaches up to 40c with the fans at 45%, practically completely silent.