Here are the key components of ultraknur's system:
- Processor: AMD Ryzen 7 5800X.
Overclockable processor with default TDP of 105W. - Memory: G.SKILL 32GB 3600MHz CL16 TridentZ RGB Neo.
In the Asus Qualified Memory Vendor List, the only G.Skill 16MB 3600MHz CL16 modules are those using SK Hynix chips; the otherwise similar CL17 modules using Samsung chips are also listed. - Motherboard: Asus TUF Gaming X570-PLUS.
AMD Ryzen 7 5800X CPU is supported by this motherboard in BIOS 2607 and later. - Graphics card: Gigabyte GeForce RTX 3070 Aorus Master 8GB.
According to TechPowerup, the TDP of this card is about 220W. - Power supply: BE QUIET! Straight Power 11 750W 80 Plus Gold.
Should fulfill the needs of this system.
I do not believe the memory modules are an issue, because memory issues show up as instability and crashes, not performance glitches.
Every component in isolation seems fine for this setup, and assuming the motherboard BIOS version is 2607 or later, they should work fine together.
ultraknur mentioned they use AiO cooling solution (closed-loop liquid cooling). This got me thinking.
TDP is Thermal Design Power, and is basically a measure of how much waste heat the part produces that must be, uh, excreted outside the enclosure. 105W from the CPU and 220W from the GPU is not
that much to get rid of using a closed-loop cooling system, but what about the rest of the motherboard?
There are all kinds of additional chips from voltage regulators (actually DC-DC converter banks) to bus logic that do heat up.
ultraknur, do you have adequate intake and exhaust fans in the enclosure to keep the air within the enclosure at a reasonable level, say < 40°C?
Double AiO for the GPU and the CPU without any enclosure fans is definitely not sufficient.
And have you verified your airflow pattern inside the enclosure to fully mix the air inside the enclosure, without "pockets" of non-mixing, hot air?
The best device to use for this is a normal indoor-outdoor thermometer with an external sensor, since their sensors are designed to measure air temperature, and they're quite cheap and ubiquitous. A few degrees off is not that important either, as you really are just comparing the air temperature outside the enclosure, to air temperature inside the enclosure at a specific spot. Of course, you do need to close the enclosure fully, to get relevant measurements. Using one of the holes at the back of the enclosure to slip the sensor through, works.
Thermal throttling could well explain the slowdowns and lagging, but I don't know the X570 chipset well enough to say for sure if the chipset can cause thermal throttling, and whether say the chipset thermal throttling due to too high ambient temperature within the enclosure could explain the symptoms. According to Wikipedia, the X570 chip itself has about 15W TDP; not that much, but not completely insignificant either.
(I am aware that ultraknur does not see any excessive GPU or CPU temperatures, and am not talking about those components causing thermal throttling. I am talking about other components on the motherboard, mainly the X570 chipset, or perhaps the CPU voltage regulators, getting too hot because of inadequate enclosure airflow, that the motherboard compensates for by automatically dropping the CPU frequency or causing some bus stalls or some such, that present as sudden "lagging" or "desyncing", because the computer basically freezes or at least slows down a lot whenever that happens.)
When heatpipe CPU coolers first came on the market, many motherboards started suffering from e.g. the CPU voltage regulators overheating because of insufficient airflow. Then, the end result was usually an otherwise unexplicable
freeze; the systems just froze, without even crashing. Currently, that problem is usually avoided by the motherboard manufacturer using a built-in heatsink, often using heatpipe(s), connecting the chipset and the most heat producing components like the voltage regulators, with taller cooling fins near the connectors at the backside of the motherboard, tall enough to catch some of the airflow from the processor heatsink and fan. I am not up to date on the niceties of the various chipsets like the X570, but them having some capability of throttling the machine to avoid overheating, even if they do not expose a software-accessible thermal sensor, would not surprise me at all. (It would not be something expected to trigger in normal use, it would be something designed to stop component damage, you see.)