I have a 900 athlon and I am having problems with my computer freezing. I have purchased many types of pc133 ram and many of them make my computer freeze VERY often while others don't freeze as often.
It may be a matter of RAM timing. There are BIOS settings that control this. Make
sure that they are set to the default settings; if someone has set the timings to be more aggressive, that will cause
major problems in some cases.
Another possible problem is a marginal power supply. Again, look to the BIOS--usually, the same screen that shows the CPU temperatures also shows the actual output voltages.
Plus-or-minus 5% is the nominal tolerance (better is good), plus-or-minus
10% is nominal for the
12V line . Make sure the P/S rated for enough output for your system. Also, older power supplies will tend to have dried-out electrolytic capacitors, especially if the fan is failing. This leds to poor voltage regulation, especially if a CD-ROM or Zip disk (for example) spins up.
How much RAM do you have? What version of Windows are you running? Win9x has an effective limit of 512 MB; more will tend to cause odd problems.
You might try an actual RAM test program suite:
MemTest86 --
http://memtest86.com
An excellent memory tester. Creates a bootable floppy or CD, depending on which version of the file you download.
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