Hello Alexey,
No, no change in the hardware at all.
Right now I don't have the time to run Memtest, but I'll give it a try as soon as I can.
Voltage, fans speed, temperature, everything is fine. The only change I can think of is the installed version of nvidia drivers. I have updated them today, and I'll try to run the new mesh generation again when I'm done with the current project.
Others ressources demanding tasks perform well (depth maps, dense cloud)