he stepping code is a 4 or 5 letter string printed on the CPU either on the core (on Durons , Athlons and Athlons XP with Palomino core) , or on a black label near the core (on the Athlons XP Tbred core or Bartons) . Every stepping indicates a revision/change in the CPU manufacturing process , wich usually has an impact on the overclockability and on the temperature of the CPU .
Duron Spitfire:
600-800: AKAA < AKCA < AKBA
800-950: AKCA < ALCA < AMCA = ANCA < ANDA
Duron Morgan:
AHHAA < AHLCA < AHLDA
9 < Z < Y
Athlon Thunderbird :
AXHA = ALUM < AQGA = AGGA = ASHHA < ADFA < AJFA = ARGA < AXIA = BXIA = AVIA = AXIAR < AVHA = BVHA < AYHJA = EYHJA < AYHJAR
9 < K < Y
Athlon Palomino:
AGKFA < AGKGA < ARKGA < AGLHA < AGNGA < AGOGA < AGOIA < AROIA < AROGA
9 < 4 < K < F < Y
Athlon Thoroughbred :
A : AIRCA < AIRDA < AIRGA < RIRGA < RIWGA < RIUGA < AIUGA < AJUGA
B :
1600+ : KIUHB < JIUHB
1700+ and 1800+ : JIUCB < JIUGB < KIUHB < JIUHB
over 2000+ : AIUAB < AIUCB < AIUGB < AIUHB
Athlon Barton :
AIUAA < AQUCA < AQXDA < AQXEA < AQZEA
Duron Applebred :
MIUHB < MIXHB
PROCESSOR CARACTERISTICS
Palomino - 0.18 microns , model 6 , FSB 266 , cache : 128K Level1 , 256K Level2
Name Mult X FSB Vcore Power
1500+ 10.0 X 133 1.75V 53.8W
1600+ 10.5 X 133 1.75V 56.3W
1700+ 11.0 X 133 1.75V 57.4W
1800+ 11.5 X 133 1.75V 59.2W
1900+ 12.0 X 133 1.75V 60.7W
2000+ 12.5 X 133 1.75V 62.5W
2100+ 13.0 X 133 1.75V 64.3W
Thoroughbred A - 0.13 microns , model 8 CPUID 680 , FSB 266 , cache : 128K Level1 , 256K Level2
Name Mult X FSB Vcore Power
1700+ 11.0 X 133 1.50V 44.9W
1800+ 11.5 X 133 1.50V 46.3W
1900+ 12.0 X 133 1.50V 47.7W
2000+ 12.5 X 133 1.60V 54.7W
2100+ 13.0 X 133 1.60V 56.4W
2200+ 13.5 X 133 1.65V 61.7W
Thoroughbred B - 0.13 microns , model 8 CPUID 681 , FSB 266 , cache : 128K Level1 , 256K Level2
Name Mult X FSB Vcore Power
1600+ 10.5 X 133 1.60V 48.5W
1700+ 11.0 X 133 1.50V 44.9W
1800+ 11.5 X 133 1.50V 46.3W
2000+ 12.5 X 133 1.60V 54.7W
2100+ 13.0 X 133 1.60V 55.9W
2200+ 13.5 X 133 1.60V 57.0W
2400+ 15.0 X 133 1.65V 62.0W
2600+ 16.0 X 133 1.65V 64.0W
Thoroughbred B - 0.13 microns , model 8 CPUID 681 , FSB 333 , cache : 128K Level1 , 256K Level2
Name Mult X FSB Vcore Power
2600+ 12.5 X 166 1.65V 64.0W
2700+ 13.0 X 166 1.65V 64.0W
Barton - 0.13 microns , model 10 , FSB 333 , cache : 128K Level1 , 512K Level2
Name Mult X FSB Vcore Power
2500+ 11.0 X 166 1.65V 53.7W
2800+ 12.5 X 166 1.65V 55.9W
3000+ 13.0 X 166 1.65V 58.4W
Barton - 0.13 microns , model 10 , FSB 400 , cache : 128K Level1 , 512K Level2
Name Mult X FSB Vcore Power
3200+ 11.0 X 200 1.65V 58.4W
Applebred - 0.13microns , model 8 , FSB266 , cache : 128K level1 , 64K Level2
Name Mult X FSB Vcore Power
1400 10.5 X 133 1.50V 00.0W
1600 12.0 X 133 1.50V 00.0W
1800 13.5 X 133 1.50V 00.0W
UNLOCKING
The Duron , Athlon Thunderbird , Athlon XP Palomino processors have the multiplier locked from the factory , and to unlock it you must connect the L1 bridges . It will unlock all the multipliers in the 5X-12.5X range , except for the XP2100+ and XP2200+ with Palomino core , wich will have the 13X-18.5X range available . On any CPU you can toggle between the multiplier ranges (5-12.5X to 13X-18.5X) by changing the connection of the L10 bridges (cut one and connect the other) .
The Athlon XP Thoroughbred core and Barton processors have the multiplier unlocked from the factory , so any motherboard that has the option for multiplier setting cand adjust it . The processors under 2000+ have the 5X-12.5X range available , and the 2100+ and higher have the 13X-18.5X range available . The exceptions are XP2600+ / 333FSB and Barton 2500+ , wich have the 5X-12.5X range available . To toggle between ranges , you need to connect/cut the rightmost L3 bridge .
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