I've made every effort for this to be correct. If you find a mistake, please let me know. This chart is valid only for cpu's that have a default multiplier of 13 or more. The 5th multiplier bit will be set high on these cpu's (2100+ and up, excluding Bartons up to the 2800+)

Update 12/05/03: CPU's with a date code of 0339 and later are being multiplier locked internally by AMD. Since the multiplier can't be changed via any method at this time on these locked cpu's, you will only be able to run the cpu at default multiplier times the max FSB speed you can get from your motherboard. If you have one of these locked cpu's, the following does NOT apply.

Dip sw or bios setting        High multiplier setting
3.0X                                    Not a valid setting
3.5X                                    19X     *
4.0X                                    Not a valid setting
4.5X                                    20X    *
5.0X                                    13X    *
5.5X                                    13.5X    *
6.0X                                    14X    *
6.5X                                    21X    *
7.0X                                    15X
7.5X                                    22X
8.0X                                    16X
8.5X                                    16.5X
9.0X                                    17X   **
9.5X                                    18X
10X                                     23X
10.5X                                  24X
11X                                     Not a valid setting
11.5X                                  19X
12X                                     Not a valid setting
12.5X                                  20X

* May not be valid on some boards
** Reported to be the only setting that works with Abit KT7A boards and a 133MHz FSB. May apply to other KT133A chipset boards too.

Other multipliers with 133MHz FSB on KT7A (and probably other KT133A chipset boards)
The following was copied from a post in the newsgroups. I can't confirm it, but I think the source is reliable.

Just ground one of the multiplier bits from the socket (3rd =2x, 4th=4x or
5th=8x). This way I was able to boot with fsb 133 and up.

3rd pulled LO atleast multipliers 15-16.5 works with fsb 133

4th pulled LO multis 13-14 works with fsb 133

5th pulled LO multis 5-12.5 works with fsb 133

The bit you want to ground depends how far your memory can take the fsb. If
you cannot complete the boot sequence with 17x133 then try lower multi with
higher fsb (not 2.26Ghz but still faster). I am running mine at 145x15 =2175
with Vcore 1.65 and VIO 3.6.

Teemu