AMD K5 Processors

Model/Stepping info

PR150 was never officially announced, but according to all the info I have it is a model 2 (making the one I have which only works as a model 1 a fake).
PR166 is a model 2.
PR200 is a model 3.

Model 2 processors will work as model 1 if the motherboard multiplier is set to 2.0 or less, and may work as a model 3 with a multiplier setting of 3.
Model 3 processors will operate as model 1 (multiplier 2.0) or model 2 (multiplier 2.5).

Processors I have tested which return a model 2 or 3 ID value all have a stepping of 4. I'd like to see screenshots of any other values you find.

I have tested two PR150ABR, with differeing results.
One tested as Model 1 (this is dated 9649), with stepping 1. This would only work when the motherboard multiplier was set to 2 (testing as a PR133). I suspect this to be a fake, as I have found no mention of it on any site.
The second chip (dated 9707) tested as model 1, stepping 4, PR133 (multiplier set to 2) and as model 2, stepping 4, PR166 when the multiplier was set to 2.5. This fits with the information I have seen on other sites and on various CPUID documents I ahve seen over the last few years. I didn't try testing it with a multiplier of 3 to see if it will produce a model 3 cpuid value, as I don't have a spare if I damage it.

PR166 processor that I tested all tested accurately as model 2 with multiplier set to 2.5, and as model 1 with multiplier set to 2 or less. Both would sometimes boot as model 3 with multiplier set to 3, but this was found to be unreliable (and I wouldn't recommend trying this if you don't want to risk damage to your processor).

AMD5k86

Core Speed
Bus Speed
TCASE

CPUID
Stepping

75MHz
50MHz
0°C - +70°C

0500
E (Revision 1)

Core Speed
Bus Speed
TCASE

90MHz
60MHz
0°C - +60°C

Core Speed
Bus Speed
TCASE

CPUID
Stepping

90MHz
60MHz
0°C - +60°C

0500
E

Core Speed
Bus Speed
TCASE

100MHz
66MHz
0°C - +60°C

AMD-K5

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

75MHz
50MHz
3.525V ± 0.075V
0°C - +70°C

0500
E

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

75MHz
50MHz
3.525V ± 0.075V
0°C - +70°C

0500
E

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

75MHz
50MHz
3.525V ± 0.075V
0°C - +70°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

75MHz
50MHz
3.525V ± 0.075V
0°C - +70°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

90MHz
60MHz
3.525V ± 0.075V
0°C - +60°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

90MHz
60MHz
3.525V ± 0.075V
0°C - +60°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +60°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +60°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0501
F

Core Speed
Bus Speed
Vcc
TCASE

100MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

90MHz
60MHz
3.525V ± 0.075V
0°C - +60°C

0511
1

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +60°C

0511
1

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0514
4

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

100MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0514
4

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

116.7MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0511
1

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

116.7MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0524
4

Core Speed
Bus Speed
Vcc
TCASE

116.7MHz
66MHz
3.525V ± 0.075V
0°C - +60°C

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

116.7MHz
66MHz
3.525V ± 0.075V
0°C - +70°C

0524
4

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

116.7MHz
66MHz
3.525V ± 0.075V
0°C - +65°C

0524
4

Core Speed
Bus Speed
Vcc
TCASE

133MHz
66MHz
3.525V ± 0.075V
0°C - +65°C

Core Speed
Bus Speed
Vcc
TCASE

CPUID
Stepping

133MHz
66MHz
3.525V ± 0.075V
0°C - +65°C

0534
4