One weird thing I've run into with an Epox EP-58MVP3C-M board is that CPU-Z can't tell the multiplier setting and FSB for either my K6-3D, or my Pentiums. Yet, those values when using a Cyrix 6x86 PR166+ get detected completely. That said, I've found this board has some weird behaviors with most CPUs when it comes to the jumper settings. On a lot of them, setting the jumper settings per the silkscreen results in frequencies that would not be correct at those settings, and it just so happens that with the Cyrix, it behaves as I would expect it. That might be a bug with my board, or its BIOS, so I'm not necessarily convinced this is a problem with CPU-Z VE.
It has however let me to notice that Vintage Edition validations without the FSB and multiplier still get marked as "Validated" on the valid.x86.fr site, but internally seem to still be classed as rejected. Namely, I shared the results to someone in a Slack chat, where the preview still said "Rejected dump" for all validations other than the Cyrix. Also, my Pentium MMX 233 running at 301MHz should have been in the top 15 if it was actually validated, which it however is not, thus it doesn't show up there. Is this intentional? I understand if the Vintage Edition demands for validation are more lax due to the fact that multiplier and FSB settings on older boards can't always be read, but in that case, there should be a separate validation classification for vintage CPUs to avoid confusion.
Validations in question:
Pentium MMX 233 @ 301MHz | Pentium 120 | AMD K6-3D 266 | SGS-Thompson Cyrix PR166+