Finally getting back to this! I've been doing some testing with my (upgraded 😉 ) K6-2+ system. Just tried out the newest 5.45 Beta2. It seems to do pretty well, but I noticed a couple minor things are getting misreported:
The new CPU is a K6-2+/550 ACZ (link). SIV reports it in most places as a K6-III (Sharptooth). There are a couple of lines where it shows K6-2+ in the saved report. It does get the L2 size right at 128kB (a K6-III would have 256kB.)
(Note: CPU-Z seems to share this behavior, it shows a 2+ on the main screen but as a K6-III on the benchmark screen.)
I've got it running at 5.5x105=577.5 MHz, a mild FSB overclock. SIV seems to be interpreting this as 7x82.5 instead (and also shows the RAM speed as 82.5MHz because of this.) It does report the RAM TIMINGS correctly, at 2-2-2-6-9 (agreeing with CPU-Z.)
Also, I don't see any indication of the L3 (motherboard) cache. Does SIV check this?
This system has my other Voodoo3 (a legit 3000 running at 166MHz) in it, and everything seems to be OK there.
The CPU temperature is fine on the main screen. In the Status window, 'T2 System' and 'T1 CPU' seem to be reporting OK, but there's a 'T3 AUX' that shows -48 C. I don't know what this sensor is, to be honest. AFAIK there's no actual temperature sensor in this CPU so I presume 'T1 CPU' is taken from the sensor in the socket?
Voltages, etc. are all being reported correctly as far as I can tell.
Report attached. 😉