Requesting Some Info Changing Processors on a Mobo

[jacktesterson]

I have an old AOPEN AP58 motherboard with a P166 MMX on it. To put a 233 MMX, which it supports, on it, do I need to change any settings or jumpers or is it completly plug and play?

 

[Mavrick007]

I would say that you will have to change 2 or possibly 3 sets of jumpers on your mobo to accomodate a different processor.
One will be the multiplyer and the others could be voltage or what not. It is not plug and play.

Your best bet is to download a manual for the old mobo and then read up on the settings for a P233 cpu.

 

[Lvis]

You probably wil need to change the multiplyer. It should be at 2.5 now and will need to be 3.5. This probably is done with jumpers, maybe dip switches. Very few jumperless motherboards back then, as they were just coming out. You ought to check the voltage too, I think they were the same though....been a long time. The voltage should be on the cpu, thats changed with jumpers, dipswitches, too.

 

[AndyHui]

Processor voltage is controlled from the motherboard.

All Pentium MMX processors run at the same voltage: 2.80 volts. As you already have a 166MMX on the board, there is no need to change the voltage.

Your AP58 is based on the SiS5582 chipset (shudder).

You will need to change Jumpers JP1, JP2 and JP3, which are located on the right hand side of the processor socket. For the 3.5x multiplier, they all need to be set to 1-2, meaning that the jumper cap is placed on the 2 pins closest to the PCI slots.

You can overclock your 233 processor using the 75MHz FSB to 266MHz, which should give quite boost to performance (since PCI, RAM are overclocked as well). You will need to set JP4, JP5 and JP6 as described in your motherboard manual, which you can get from here if you don't still have it.

 

[jacktesterson]

Thanks Everyone. I am just playing with an old PC i have downstairs.


i have a question though, I know the Processor is a 200 or a 233....how do I know which one it is?

 

[jacktesterson]

Anandtech has a review about this motherboard haha...the Aopen AP58, and it got a really good review from Anandtech....so why the complaining? hehe...i do have a Athlon as well...so I realize how slow it is...but the AP58 was a solid board in its day

 

[HelzBelz]

Originally posted by: AndyHui
Processor voltage is controlled from the motherboard.

All Pentium MMX processors run at the same voltage: 2.80 volts. As you already have a 166MMX on the board, there is no need to change the voltage.

Your AP58 is based on the SiS5582 chipset (shudder).

You will need to change Jumpers JP1, JP2 and JP3, which are located on the right hand side of the processor socket. For the 3.5x multiplier, they all need to be set to 1-2, meaning that the jumper cap is placed on the 2 pins closest to the PCI slots.

You can overclock your 233 processor using the 75MHz FSB to 266MHz, which should give quite boost to performance (since PCI, RAM are overclocked as well). You will need to set JP4, JP5 and JP6 as described in your motherboard manual, which you can get from here if you don't still have it.

Or, get a quick view of this Aopen AP58 page directly. for jumper settings.

Look for "INTEL Pentium PP/MT 233" for the non-overclock exact setting, or under "Selecting the CPU Frequency" for any other setting.

From my own experiments, I can agree with AndyHui : the 75MHz FSB and 3.5x multiplier do work with most Pentium MMX 233MHz, giving you pretty much all the juice that can ever be squeezed out a P55C core...

BTW : ... to clarify, one should write "...all Pentium MMX CPUs run at the same voltages..." : i.e. they are dual-voltage processors; the board will detect that fact (and already be set accordingly; indeed, same voltage setting as for your 166MMX)

... but I'm just being picky here.