@Markfw,
I agree with
@guskline that you should check whether all air has been migrated out of the block and the radiator into the reservoir.
For this, it
may be sufficient to run the pump at full speed for a day or so. But maybe that's not enough, and alternating the pump between full speed and ~1/2 speed in intervals could do the trick, and/ or leaning the case at different angles. But the most important factors here are observation and patience, IMO.
Second, the air that got into the reservoir needs to stay in there. If the pump runs at high speed, air bubbles might get recirculated back into the loop instead of rising to the top of the reservoir. Most reservoirs have some sort of diaphragm between inlet and outlet to help prevent this. Some reservoirs come with an optional sponge-like thingy which can be inserted to slow down the bubbles.
Third, re pump speed: In a loop like yours which has just one water block and one radiator, I would expect that moderate pump speed should be fully sufficient in order to use the block and the radiator to their fill capacity. In loops with more waterblocks (and to a degree, loops with more radiators), higher pump speed & pump pressure are needed.
[In my dual GPU hosts with 3 waterblocks (CPU and GPUs) and 2 radiators, I run one D5 pump at about 65 or 75 % speed or so. In my triple GPU host with 4 waterblocks and 2 radiators (one of them a MO-RA3) and 2 quick disconnect fittings which are somewhat restrictive too, I run a D5 pump at 90 or 100 %. Perhaps even a dual pump setup would be justified for that latter host.]
However, it is easy to check whether or nod you need more pump speed: Keep the processor load + ventilation constant, try different pump speeds for ~10 minutes at a time, and observe CPU temperature. IME the effect of pump speed on CPU temperature (or in case of watercooled GPUs, the effect on GPU temperature) is quite immediate, if there is any effect at all in the first place.
Hey Mark, my MO-RA3-420 isn't sounding so bad now.
Seriously, another 360mm radiator would really help a lot.
I have to agree. Based on temps, I am now down to 3775, and 70c. (1.15 vcore) @3800 it was over 80c
I just check the price on that rad. $230 shipped !! (newegg) but if I want to OC more, I think thats the key. Oh, also a pile of fans
Mounting the 9 fans onto the MO-RA3-360, and getting them all to spin despite the bundle of cable splitters crammed into the radiator housing, took me a whole while.