high multipliers on an Epox 8kha+ (via 266a)

[dandan]

Is there a simple way to have access to the high multipliers, above 12.5 on this or any Via 266a board.
I have the Epox 8kha+ with the newest bios (8khi2b06) and it shows options of ...10.5,11,12,13,14,15.
But 13 is actualy 12.5 and 14 and 15 are 11.
Because this motherboard does not have a 1/5 pci divider and my SB live plt. does not like speeds over 42MHz,
I am stuck at a FSB of 168. (168/4 = 42MHz)

This gives me a top end of 168 x 12.5 = 2.1GHz. @ 1.6v on my 1700xp at 30°c idle with a slk-800.

My system will run all day long at this speed.
This chip must have more to give.
Please help me get it.
Dan

 

[johncar]

<a href="http://www.beachlink.com/candjac/index.htm">
http://www.beachlink.com/candjac/index.htm</A> link to Workarounds article. It's not simple with a deafault 11X 1700, but can be done. See also Tbred, Multiplier Code, Circuits articles to get familiar with what goes on re Multiplier, bridges, signal circuits, Bit Values etc. Makes the workarounds "understandable".
John C.

 

[dandan]

thanks for the information Johncar.

Have you ever used the shorting the two pins method first hand?

I did this back in the day to up the Vcore on an old Cel 533 that ran at 920Mhz.
That chip is still running strong 3+ years later.
I used 1 strand of wire from an old ide cable.
My guess is that should work fine for this also, unless you have any better ideas.

thanks again.
Dan

 

[johncar]

Used the fine wire strand in sockets mod long ago. any grounding of the 5th bit's signal circuit will work and none of them are difficult. We like the wire soldered to socket AJ27 now as it can be remotely grounded/LO and restored open/HI without removing Hs and CPU.
John C.