This is my second build in the Evolv X with the goals to upgrade to a Ryzen 3700X, go restrained on the RGB lightning and use an-easy-on-the-eye hardtube layout and simple color scheme.
As with all my builds, the first goal is for the system to be very quiet - even at full load. But with this one, I wanted to get more performance out of the Evolv X and better temperatures. The first Evolv build was a long way off the thermals that I got in my Define S build (420+280 rad both as exhaust).. This is a bit unfair on the Evolv X :-) But anyway, I did want to see if I could approach that in the Evolv X case.
So rather than the previous 280+280 setup, I went with a 420 radiator in front. I had to go EK for the 420 rather than my preferred Hardware Labs radiators, just because of the the fit / tolerances in the Evolv X. Having the 420 means more cold(er) air going in, slightly better cooling at the front but more importantly: no more recirculation of (hot) case air back being sucked back into the rad.
Later, I added an extra fan on the back which turns the case to slightly negative pressure; the colder air being sucked in elsewhere lowered the air temperature inside the case by quite a few degrees. That in turn helped the top radiator to actually cool, being fed colder air.
For people used to high-fan-rpm watercooling only, with low-rpm watercooling, the air coming out of a radiator is nearly the same as the water temperature. This makes the classic one radiator 'in', one radiator 'out' setup not very effective for the 'out' bit!
Water temperatures are now ~4.5C over ambient at idle (down from about +7C in my last build), with fans at 450rpm. At full load in games, the water temp goes up to 10-14C above ambient, and the fans reach a set max of 700rpm once the water is +11C or over.
As a last thing, overclocking. Well that all changed quite a bit.. there's not much to be had with this generation of Ryzen, but the memory overclock from 3200 to 3733 did make a decent difference.
This system runs stable at 4.25Ghz on 1.36V, with memory on 3733Mhz CL16-16-16-16-32 and FSB on a matching 1866 Mhz. SOC Voltage is just under 1.12V and CLDO_VDDC is at 1.05V - both were needed to get that 3733Mhz stable. Cinebench R20 scores 5015 with these settings.