This one gets quite a few people that buy a 2600+ with the idea there is only 3 versions of this CPU, T-bred, Barton & Mobile Barton to be precise.
So here it is...What 2600+ do you have?
Model 10
XP 2600+ . Barton ( L2 512KB) 11.5x166MHz = 1917MHz, WCPUID = 6-10-0, (AXDA2600DKV4D)
XP-M 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AXMA2600FKT4C)
XP-M 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AXMG2600FQQ4C) 45W
MP 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AMSN2600DUT4C)
XP 2600+ Thorton (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-10-0, (AXDC2600DKV3C) <-- Rumoured to be a fake, AMD is inconsistent with a hard yes/no answer.
Model 8
XP 2600+ Sempron (L2 256KB) 11.0x166MHz = 1833MHz, WCPUID = 8-8-1, (SDA2600DUT3D)
XP 2600+ T-bred B (L2 256KB) 12.5x166MHz = 2083MHz, WCPUID = 6-8-1, (AXDA2600DKV3D)
XP 2600+ T-bred B (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-8-1, (AXDA2600DKV3C)
MP 2600+ T-bred B (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-8-X (AMSN2600DKT3C)
Download and run CPU-Z or CBID either will tell you what you have.
So here it is...What 2600+ do you have?
Model 10
XP 2600+ . Barton ( L2 512KB) 11.5x166MHz = 1917MHz, WCPUID = 6-10-0, (AXDA2600DKV4D)
XP-M 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AXMA2600FKT4C)
XP-M 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AXMG2600FQQ4C) 45W
MP 2600+ Barton ( L2 512KB) 15.0x133MHz = 2000MHz, WCPUID = 6-10-0, (AMSN2600DUT4C)
XP 2600+ Thorton (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-10-0, (AXDC2600DKV3C) <-- Rumoured to be a fake, AMD is inconsistent with a hard yes/no answer.
Model 8
XP 2600+ Sempron (L2 256KB) 11.0x166MHz = 1833MHz, WCPUID = 8-8-1, (SDA2600DUT3D)
XP 2600+ T-bred B (L2 256KB) 12.5x166MHz = 2083MHz, WCPUID = 6-8-1, (AXDA2600DKV3D)
XP 2600+ T-bred B (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-8-1, (AXDA2600DKV3C)
MP 2600+ T-bred B (L2 256KB) 16.0x133MHz = 2133MHz, WCPUID = 6-8-X (AMSN2600DKT3C)
Download and run CPU-Z or CBID either will tell you what you have.