RAM incompatibility

I wish to install 3 times 128MB 168pin ram chips into a new Compaq PIII.  This is to replace the 2 times Hyundai 64MB chips that came with the new machine.  After swaping the ram chips I get a message saying there is an incompatibility with DIMM ram!!.  I would like to know whether it is possible to use other 168pin ram in this new system and if so how to sucessfully install the chips.  I was intending on installing 4 times 128 MB ram but the motherboard has only 3 times 168pin ram slots?
rodleaAsked:
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RoadWarriorCommented:
It is new? Then talk to Compaq direct, get them to pay attention by telling them you are returning the machine if you cannot upgrade the ram.
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OttaCommented:
Install just one DIMM and boot.
Do you still see the error-message?
If not, install a second DIMM and try again.
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sorgieCommented:
Are you using 168pin 100mhz ram?
168 pin still comes in 66mhz which may cause you a problem it used on a 100mhz motherboard so check your specs s
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rodleaAuthor Commented:
the 128MB 168pin ram i wish to install is about 3 yrs old and is likely 66mhz.  the new compaq motherboard is 100mhz.  is there no way around this incompatibility in frequency
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OttaCommented:
> is there no way around this incompatibility in frequency ?

Two ways:

 - swap a few dollars and the 66Mhz RAM for 100MHz RAM -- in my town, there are computer-stores which will do this.

 - setup the motherboard to limit it to 66Mhz operation. (Yes, it will slow your computer down, but you asked for a way!)
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