lost multipliers in bios! help!

[Naterator]

Is it normal on the asus a7v133a boards to not be able to run .5 increment multiplier ratios? Like when I first tried to overclock my 900 tbird to 1050, I couldnt do it. I would set it at 10.5x100 to get 1050. I could overclock that high by running the fsb a bit higher, but it wouldnt allow me to use the .5 multiplier ratio? Is this normal? Infact, I just tried this tonight. I was going to run at 1074 using a 7.5x143 ratio but it booted at 1000 mhz because it kicked back down to a 7 mutiplier just like it did earlier. I dont know why it's doing this, but I can run at any whole number ratio i.e 8.0, 9.0, 10.0, 11.0 but not 10.5 or anything like that? fsb works at 143 but I dont wanna have to overclock my fsb to 153 just to get my current mhz back. Anyone know what the deal is?

Nate

 

[tblubrd]

You need to read the Anandtech article here and see if this may explain your problem. Sounds like you might be having this trouble - although I have not had this problem on the IWILL board.

 

[WarCon]

Pretty sure all that means is your pencil trick isn't done well enough. Re pencil your processor being very careful. Use a mechanical pencil if you have one (.5 lead) or a very very sharp #2.

This happened to me in the same exact way, different mobo.

 

[johncar]

Naterator,
http://members.nbci.com/candjac/index.htm Duron/Tbird OC article explains that the FSB Mltiplier invloves the use of "four" separate circuits which control .5X, 1X, 2X, 4X, "Adders". If any of the four L1 bridges is still open, the respective Adder, (or non-Adder), cannot be "changed".

Your problem is most likely that the leftmost L1 bridge is not closed so that the mobo cannot enable the default disabled .5X Adder.

Read the article.
John C.