Going over thermals on the new mobo. No sensors available yet within CPUID HWMonitor for the “EVGA Corp. Z390 DARK” menu at the bottom (of this first image) is empty when expanded. I’ll try AIDA 64 Extreme and HWiNFO64 later today. No OC on the 8086K yet, that’s why idle temps are low, yet a nice 5.4Ghz all cores all threads and idle temps only move to the lower 30Cs to mid 30s at least with the Apex X board - the SL guy did an amazing job with the CPU delid and relid with Conductonaut - all 6 cores always idle within 2C of one another no matter what the overclock; 5.4Ghz 6C 12T profile or a 5.6Ghz 5.5 5.4 5.2 5.2 5.2 single core boost profile, which to me means he placed a very even layer of Conductonaut over the die before reseating the IHS.
The Intel MEMPEK1W032GA in the image below is the Optane 32GB M.2 drive and it usually idles all day long on the ASUS Apex X-ROG DIMM.2 at 47C (damn hot) the module adjacent to the memory DIMMs and 45C the other side of the DIMM.2 riser card. The M.2 socket positioning on the EVGA Z390 DARK board is a dramatic improvement as long as you are running only single-slot graphics as in my use case. Took that into consideration before deciding on the Z390 DARK. I worked all day yesterday with the new motherboard after installing a single work application and the Optane M.2 temp increased to only 37C passively (no active fan) and stabilized - extremely happy with that result.
If on the other hand, you are running a 2.5slot thick 2080Ti open design graphics card, then both M.2 socket positions on the Z390 DARK could become a real thermal issue, the graphics card pushing warm air down onto both M.2 heatsinks. With a 2.5slot card, I don’t believe the M.2 installed in the secondary position would fare any better than the primary. A solution for gaming would be simply using a SATA SSD or an Optane Add In Card in PCIe slot PE3 (marked below solid red arrow) on the Z390 DARK.
The (3) fans in the build are all set to inaudible. The large Noctua 140mm Industrial PWM 2000rpm-rated (Fan 2) goes inaudible at around 680rpms when mounted “without” the Noctua retention clips, those clips only act to compress the noise absorbing silicon corner mounts - diminishing their ability to isolate the fan, so it’s just a simple gravity mount, the fan resting on top the cooler’s horizontal bank of vertical fins. The desk rumbling crazy-loud out of the box 15,000rpm Sanyo Denki 40mmx28mm PWM fan (Fan 1) mounted within the Supermicro 8-bay 2.5in drive cage goes inaudible around 1200rpms, both controlled by an Aquacomputer Aquaero 6 LT mounted internally and AquaSuite 2018-9 software. As already stated, the AMD WX 4100 graphics card fan moves to inaudible at 18% approximately 2000rpms using MSI Afterburner software. There’s really no need to run the Sanyo Denki fan at all since the (4) Samsung 860 Pro SATA SSDs in the Supermicro drive cage need no active cooling, yet the Aquaero 6 was/is right there with an empty fan port and although the fan is capable of extremely high rpms, it’s also very lightweight and easy to render inaudible with the Aquaero 6, and the (4) Samsung 860s run in the low 20Cs all day long, so I figured - why not?
Could easily run this entire build inaudible - all day long with only (2) fans (removing the drive cage fan), even with high CPU and memory overclocks - even after I remove the Optane M.2 initial testing drive and add an Optane 905P PCIe AIC 280GB SSD, and an Optane 905P M.2-U.2 280GB 2.5in SSD, since the lower capacity Optane drives require no active fan when using an open air chassis.
Very happy with the Z390 DARK so far, only hope it overclocks like a beast, or at the very least as well as the Apex X, will find out soon.