FSB mod on a IBM 600X

[cmarti]

I got the 600X that can be seen in my sig running a PIII 800MHZ processor but i would like to increase the FSB to 108 to make it faster, is that possible?

I been reading here and over the net but i cannot find anything.



Thanks..

Carlos.

[cmarti]

BUMP.

Are any thinkpad modders there?

I have seached more but still cannot find anything.

[Sharedoc]

Hi,

As far as I know, 600X has a different clock generator chip than 600E. Also the 600X clock generator data sheet was no more available in Internet when I searched it last time about 1 to 2 years ago.

So we don't know if it has hidden FSB's available unless someone tries to hack the clock generator FSB selection pins to try all 8 combinations.

First there is a need to find out the FSEL pins and then force the input combinations to these pins and see if boots and what FSB. The pins may also be bidirectional which may complicate further the trials.

Anyone volunteer?

Unfortunately I don't have 600X.

[cmarti]

Anyone volunteer?

Unfortunately I don't have 600X.

Sharedoc,

First of all thanks for the reply!

What the volunteer need to do send a 600X to you?

From the laptops that can be seen in my sig the 600X is the one i use the most.

Thanks..

[Sharedoc]

I suspect the 600X clock generator to be IMI C9714AYB.
Unfortunately I don't have data sheet

From the pinout and design time and technology I suspect it be equivalent to Philips chip

http://www.standardics.philips.com/prod ... k2000m.pdf

Not sure

[cmarti]

This is taken from the thinkpad forum:

Whew, finding the datasheet for the C9714 clock generator was easy compared to finding the actual part! The datasheet is available from here:

http://www.alldatasheet.com/view.jsp?Searchword=c9714

I spent over an hour looking for the part on the motherboard. At first I thought that maybe a different part was being used so I entered at least a dozen part numbers into the alldatasheet.com site but didn't find anything that could be a clock generator. Then I noticed a couple of insulating sheets of plastic around the MiniPCI area. I peeled back one piece and there it was:

Picture of 600X showing IMI C9714 (158KB)

This view is of the bottom side of the motherboard with the I/O ports at the top and the memory slot at the bottom.

Finding the datasheet is the good news. The bad news is that looking at the pin descriptions it appears to be a little bit different than the PCK2000(M?) device. Pin 16 is the selection between 66Mhz and 100Mhz. The adjacent pin (#15) is marked as VSS, which is ground. It may be that it is an actual ground pin OR it might be like the PCK2000 device where it is a select pin that in normal operation must be grounded. I suppose the only way to find out is to cut/lift pin 15 and connect a pull-up resistor (say 5K-20K; just a guess) to pin 19 (VDD).

Note: I cannot guarantee that this will work as an overclocking solution. Nor can I guarantee that damage will not occur to your motherboard.

From looking at the PCK2000M datasheet, the SEL pin (16) should normally be tied to power. Since the 8% FSB mod is supposed to be done by attaching a 1K resistor near the CPU module connector (which is on the opposite side of the 600X board where the IMI C9714 chip is), I would imagine that what is really happening in the 600E is that the PCK2000M SEL pin is being grounded. That would place the device in "test mode", according to the PCK2000M datasheet. No such mode is evident from looking at the C9714 datasheet.

In short, I cannot say for sure that it is possible to overclock the 600X motherboard in a similar manner (adding a resistor) as the 600E.

[Sharedoc]

Thanks for the link for the C9714 datasheet.

Looks like it is not the same chip as the Philips type. There are differences in pinout, like XTAL in and out.

Any of the VSS pins could be the additional FSEL or TEST input, so you have several pins to cut in your experiment Good luck.