A Closer Look

Following what I would consider traditional radiator design principles, this system opts for a simple aluminium radiator with an FPI (fins-per-inch) of 20-21, which is consistent with many other AIOs. To spruce things up darkFlash added their logo to the side of the radiator rather than leaving it plain. The tubing is nylon sleeved IIR+EPDM rubber that enters into glossy black fittings, is nylon-braided for improved visual aesthetics and durability, and measures in at a length of roughly 400 mm. Considering the size of the Nebula, I would have liked to see this extended a bit further to 450 mm.


The pump has a built-in mirror improving looks if ARGB is disabled, but that also allows for the ARGB lighted pattern to show through when enabled. What I really appreciate here is they didn't opt for a boring logo dead center like most brands, instead adding an interesting visual element that works better in numerous build themes. Looking at the wiring harness and the fittings, they exit the pump housing on opposite dies which is nice and the swivel fittings offer a decent range of motion, at more extreme angles they will conflict with each other, but it's a non-issue. Taking a close look at the copper base I found it to be slightly convex with a finish that looks more like it was sand blasted than machined.


The fans have a rated max CFM of 61.7 and a PWM RPM range of 800–1800. I would have liked to have seen the bottom end of the RPM range extended a bit lower. Other than that the back of the fans have no distinct model number listed. In terms of appearance the blades are semi-translucent for improved ARGB lighting, with the rigid frame featuring grooved plastic that adds a nice bit of flair, as opposed to more sterile designs.