Overclocking

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AMD K7 Athlon (Socket A version)
On top of the CPU small metall contacts can be found labeled L1 .. L7.

These contacts are used to determine voltage, front side bus (FSB) and multiplier.
Some CPU's have all contacts (bridges) intact and therefore can be forced by BIOS for different settings.
All other versions can be set "free select" mode by reconnecting the bridges. Reports indicate that even a pencil can do the job. Best would be a conductive silver pen. Many mainboard manufacturers provide a sticker with preprinted bridges to fix the contacts.

If your mainboard does not allow to select CPU settings you can set these by cutting appropriate contacts. See following tables:

CPU Marking	Week of manufacturing	Most probable overclocking
Duron 600
AKAA0022MPMW	<22	800-850MHz
AKAA0023EPCW	23 multiplier unlocked !	850-900MHz
AKAA0024DPBW	24	800-850MHz
AKAA0025FPBW	25 multiplier unlocked !	950-1000MHz
AKAA0027BPAW	27	900-950MHz
AKBA0029TPAW	29	900-950MHz
AKBA0029XPDW	29	850-900MHz
AKBA0029XPCW	29	950-1000MHz
AKBA0030EPIW	30	850-900MHz
AKBA0030EPGW	30	850-900MHz
AKBA0030RPAW	30	850-900MHz
AKBA0032EPAW	32	900-950MHz
AKBA0035CPAW	35	1000MHz
AKBA0036APAW	36	1000-1050MHz
AKBA0036APBW	36	950-1000MHz
AKBA0036BPHW	36	1000MHz
Duron 650
AKBA0026DPCW	26	900-950MHz
AKBA0031UPCW	31	1050-1100MHz
AKBA0032APEW	32	950-1000MHz
AKBA0038DPJW	38	1000-1050MHz
AKCA0043UPCW	43	900-950MHz
AKCA0043XPGW	43	950MHz
AKCA0045UPJW	45	850-900MHz
AKCA0045BPAW	45	900-950MHz
Duron 700
AKBA0038FPBW	38	1000-1050MHz
AKCAR0048XPMW	48	950-1000MHz
AKCA0049MPMW	49	900-950MHz
AKCA0049UPMW	49	900-950MHz
AKCA0101SPAW	01/2001	900MHz
AKCA0103MPMW	03/2001	950MHz
AKCA0105SPAW	05/2001	950MHz
Duron 750
AKBA0040TPHW	40	900-950MHz
AKCA0044TPFW	44	950MHz
AKCA0047SPNW	47	900-950MHz
AMCA0051CPAW	51	900-950MHz
AMCA0051TPAW	51	950MHz
AMCA0101FPAW	01/2001	900-950MHz
Duron 800
AKBA0037EPCW	37	1000-1050MHz
AKCA0046MPMW	46	950MHz
AKCA0051MPMW	51	950MHz
AKCA0104WPEW	04/2001	950-1000MHz
Duron 850
AKCA0051MPMW	51	1000-1050MHz