That was a fun read, particurlarly the first paragraph. This is what I suspect Cyrix did with the 5x86/4X CPUs -- Test them, then stamp them with what frequency ratings passed specs. Thank you for the information.
I'm going to run the 586 test on a very versitile socket 7 motherboard, which from what I can tell, is basically a super7 without 100 MHz FSB and AGP support. Albiet, some highly overclocked CPUs can't be tested, but that is fine with me.
This AZZA PT-5IT v2.1 has support for:
FSB (MHz): 50, 60, 66, 75, 83
Multiplier (x): 1.5, 2.0, 2.5, 3.0, 3.5 (via 1.5), 4.0, 4.5, 5.0, 5.5, and 6.0 (via 2.0)
Voltages (V): 3.3, 3.5, 3.2, 2.9, 2.8, 2.5, 2.1
Extra support for: Cyrix MII/4X and AMD II/III+
Supports 256 MB of DIMMs (2x128MB), 512KB pipeline burst, i430TX
Agreed, all RAM should be kept cacheable here so as not to distract from the extended cacheable range of the AMD K6-III+. For this i430TX, I need 64 MB. I have 64 MB SIMMs, a single 32 MB DIMM, and some 128/256/512/1024 MB DIMMs, but would rather plop in a fast 64 MB DIMM. I might need to do some shopping. EDIT: $3 spent, 64 MB DIMMs achieved.
EDIT2: Crap, that means for a valid Cyrix 5x86 vs Cyrix 6x86 comparison, I need to redo the 5x86 and POD with all cached RAM. heh, what's another 5 CPUs anyway? It only really affected 3 or 4 of the Windows-based scores.