Location of jumpers / dipswitches

[technossomy]

I am still struggling with implanting a working PII chip onto a Targa motherboard (http://www.pcguide.com/vb/showthread.php?t=42661). I have 3 CPUs: 266, 350 and 400 MHz and none seem to yield a working computer. I may have damaged the motherboard when working on the insert or it may simply have to do with the jumpers. Can someone point me to a resource explaining the things one needs to know about setting jumpers? In my case, there is no manual.

A picture of the board (RAM, CPU and most cards detached for overview) can be found here:
http://www24.brinkster.com/ontario/IMG_0101_.jpg (217 kB)

Thanks in advance

Tech

[technossomy]

I have already had the motherboard replaced with a more appropriate PIII motherboard by a local hardware dealer. Still my question remains regarding the dipswitches and jumpers.
Could someone identify and explain the purpose of the yellow, black and blue components which are on the original motherboard displayed below?

Thanks in advance


Tech

[jlreich]

There is no way of knowing exactly what settings the jumpers and DIP switches effect without a manual.

Have you tried googling the make and model number or serial number? Or try posting the make, model and serial number here. Who knows someone may actually have or have had the same board. Worth a shot anyway.

[saphalline]

Could someone identify and explain the purpose of the yellow, black and blue components which are on the original motherboard displayed below?Basically what they do is determine the correct combo of FSB speed and CPU clock multiplier for any CPU that is to be used. The settings needed for your CPU's are as follows:

266MHz = 66 FSB x 4.0 clock multiplier
350MHz = 100 FSB x 3.5 clock multiplier
400MHz = 100 FSB x 4.0 clock multiplier

But as jlreich has mentioned, we can't tell you exactly what combo of jumpers and DIP settings your new mobo needs to get these numbers. Every single jumper-based mobo that I've seen is different, and I've dealt with plenty of them! Give us something more to go on.

[technossomy]

Thanks guys, I wasn't aware there were so many motherboards out there. A quick search yielded close to 500 motherboards for the PII. A fact that probably doesn't surprise most of us anymore.
The make is a GIGA-BYTE TECHNOLOGY CO., LTD. GA-686LX4 version 2.0.
The official manuals can be found here (http://tw2005.giga-byte.com/Motherboard/Support/Manual/Manual_GA-686LX4.htm) (all pdf). An HTML based manual is here (http://www.resoo.org/docs/_hardware/th99/m/E-H/36096.htm), and contains the bulk of the jumper settings.

Now, the chip is a Pentium II (B80523P350512E SL2WZ) (http://www.cpu-world.com/CPUs/80686/Intel-Pentium%20II%20350%20-%20B80523P350512E.html) and hence runs on 350MHz. If the motherboard manual speaks of 333 MHz or 366MHz, that means I should set the blue box switches to run on 333MHz, ie thou shalt not overclock?

Thanks in advance


Tech

[saphalline]

Well... it doesn't quite work that way...

You see, the CPU multiplier is internal to the CPU and can't be altered. When you set the multiplier on the mobo, all you're doing is telling the mobo which CPU you're using - you can't use it to alter the CPU multiplier. The only thing you can change is the FSB speed. And on that mobo, the only supported FSB speed is 66MHz.

So with the CPU's that you have, 4.0 is the highest multiplier you have. And 66MHz is the highest FSB speed you have. So the fastest you can run any of those CPU's is 66 x 4.0 = 266MHz. So in this case, the 266 and the 400 would give you the same result, while the 350 would run at 233MHz.

[technossomy]

Thanks for that response. From what information I can garner the motherboard runs optimally now.

Thanks again

Tech