Note: You should only do this if you are familiar with bridge modding, or if you know the risks you are taking by modding your cpu, it may occur permanent damage by doing a bad mod, and you willl void your warranty by doing that. Neither OCWorkbench or me will take any responsibility if a CPU is damaged during the process. If you have no problems with that, go ahead :-)
The Athlon XP-M Multi BIOS that is currently being distributed in this forum introduces one great feature, that is the ability to control the multiplier of Mobile Athlon XPs within BIOS.
This will enable us to control multiplier of locked AMD Athlon and Duron CPU´s, without having to change it in windows or through bridge modding, tough some basic modding is still required.
Previously I explained in my article here there is a way to change all AMD socket A cpu´s (except pre-palomino cpu´s) into mobile Athlons, this is NECESSARY for the multiplier option of this bios to be enabled and working, otherwise it won't appear.
Also you will only be able to select multipliers until 11x unless the modding to the L6 bridges, which control the multiplier is made, to open till 24x. This mod is also described in the 3rd page of the previous article.
From my experience the 3x and 4x multiplier, though selectable are useless, since the computer won´t boot the OS, and if selected in windows through CPUMSR will cause a reboot. It may be related with the max multiplier, which I am currently using as 12x, if higher is available, through modification of L6 bios you may lose lower multipliers like 5x and 6x, though i haven´t tested it yet.
You should only perform this if you want to have your locked cpu with multiplier selection, or if you want to be able to change multipliers on-the-fly in windows.
This is a great overclocking feature (kudos to ASRock) which we hope to see it better implemented, in a few months I hope this is available without any modification being made to the cpu.
You can find the beta bios in the ASrock Beta page and discuss it at the link below.
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