Nekochan Net

Does anyone have the images to the resistor placements for overclocking the O2 180mhz to 200mhz? The link below seems to have the key images missing:

http://www.mechanics.citg.tudelft.nl/~everdij/papa/overclocking_o2_seite3.html

From this thread (viewtopic.php?f=3&t=7770&p=59096), I think this site was translated by dexter1 a while back...

Here you go:

Thanks heaps..!

Does anyone have an O2 350Mhz CPU board...? Could you possibly reply with the multiplier resistor positions for that board? I checked my 300Mhz O2 board and it has the following settings:

R47 R48 R49
R51 R52 R53

100ohm Resistor positions are in bold red.

Was thinking that the same trick may work on this board..?

The 300Mhz resistors are in series as follows:



Resistor positions R47 and R48 are in series.
Resistor positions R51 and R52 are in series.
Resistor positions R49 and R53 are in series.

Using the same principle for the 180Mhz, can only swap resistor positions in series, as with the 180mhz and 200mhz boards.

Interesting I've been looking around for this as well - I've got a 300MHz r12k O2, and would like to try bumping it to 350. Never found a proper guide for that though. Guess I'll monitor this thread for a while

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Probably not the 350MHz Module you're looking for - this is a R7000.

Thanks for the pictures... it looks to be the same as my 300mhz. The part no. on the underside for the 300Mhz is 030-1493-004.

The resistor placement is the same as on my board, which is below (this is cut from your pictures):

I've been trying to establish the required resistor positions for 350MHz for ages, no luck so far.

Ian.

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If that over clock is important enough, you might have to consider breaking out the soldering iron and doing some trial and error experimentation. You may be able to use the base, overclock speed and resulting resistor movements of some of the other processors shown in that pdf and extrapolate what's needed to overclock the 300Mhz. to 350Mhz.

or you could avoid the potential for risk and continue to wait for ages......

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That's surprising, since this is a 350MHz R7k:

Yes, the board looks identical to my RM5200! If the resistor positions are the same, then what would the internal serial eprom multiplier setting of the RM7000 board be to yield 350Mhz, this would be 5.83? (350/60)? The clock crystal (60Mhz) is the same. Thought that the multiplier was whole numbers?

Hmm well I've overclocked G4 eMacs and iMacs with some success, using simple solder links, or a ribbon cable and DIP switches instead of resistors...
Or if you're really crafty get plain old resistors with the same value, and build a simple PCB with DIP switches.
Experimentation possibilities would be 'almost endless'

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Since the multiplier resistor layout seems to be the same as the R7000 board, have ordered a few 66Mhz crystals and will give that a go first, and see if 330Mhz is fine...