Just discovered my latency is through the roof, looking for a new ITX MB

So I just ran latency test and discovered my max jitter was 400,000+ on an old Intel Atom D2550. For a while I've thought this wasn't the best board, so I'm looking for a new MB and CPU. I run a 5i25, so I need a PCI or PCIe with PCIe to PCI adapter. I'd prefer 12V, but that's not a necessity. I'd like ITX or smaller so that it fits into the control cabinet without much fuss. I haven't built a PC in 15 years, so I'm way out of the loop. I want to run Mint with LCNC 2.8, the 5i25 has a 7i77, running 3 analog servo drives and an analog VFD for spindle control on a Hurco mill. I'd prefer not to buy another Mesa card (ethernet) unless I have to. The 5i25 works.

Thank you for your help.

Thanks Tommylight, I'll give this a shot tonight. This is compatible with Mint, yes? I just click through on the mill and install these files?

So after all that I still have a latency of 140,000ns without really punishing the system. I just opened this window and youtube. Pretty sure the PC is just shot. At idle jitter is 90k ns

Linux CNCMill-Mint 4.19.106-rt44-lcnc #1 SMP PREEMPT RT Thu Mar 5 00:02:34 AEDT 2020 x86_64 x86_64 x86_64 GNU/Linux


so it looks like the rtai kernel didn't install

Also, I have a conflict installing linuxcnc_2.8.0~pre1_amd64.deb - it conflicts with the current Linuxcnc-uspace installation.