cpuz1.png
I'm running a 486BL machine here, mine was originally clocked at 3*25 for 75MHz but with help from a friend I'm using a modified BIOS to set the multiplier to 2x as 3*33 wouldn't even POST. Technically the CPU is underclocked now at 66MHz but as you can see from the second screenshot, I don't lose a ton of CPU performance and in return every other aspect of the system is uplifted (RAM, IO, Video, FPU). It doesn't seem to properly detect the cache, I have 16K L1 and 256K L2, but as I said in the SIV thread even cachechk doesn't think I have L2 even though there is a small (but measurable) difference in latency for accesses below/at and above 256K. Without a CPUID instruction, it seems this really struggles to say anything about the CPU. FPU is an IIT 4C87DLC at 33MHz.
cpuz2.png
The .zip attachment is the .cvf validation file it generated, I don't know how much use that is to you.
Nanto: H61H2-AM3, 4GB, GTS250 1GB, SB0730, 512GB SSD, XP USP4
Rithwic: EP-61BXM-A, Celeron 300A@450, 768MB, GF2MX400/V2, YMF744, 128GB SD2IDE, 98SE (Kex)
Cragstone: Alaris Cougar, 486BL2-66, 16MB, GD5428 VLB, CT2800, 16GB SD2IDE, 95CNOIE