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ram upgrade

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9 replies

by scud84

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I installed 2 pc66 32meg sdram modules to a 586 mainboard running with a cyrix 233mhz processor. the old ram was edo. when booting up, it recognizes the ram and the system makes it to the windows 95 startup screen but freezes and wont resume.

9 replies

by tbradley

Although you didn't post any specific brand names on system/system boards, by 586 I guess that you have an AMD or Cyrix processor. These boards do not generally like mixing ram types.

Pull the New ram, reboot, and see if everything is normal.
Pull the old ram, insert new ram, and reboot to see what happens.

If the system freezes on the new ram, you know wherein the problem lies, and research the motherboard manual to see if there is a
dip switch or setting to allow "non-edo" ram.

by william jay

Also check that "enable/disable parity" is at the proper setting in BIOS setup, and that the timing for 'refresh' is set to a sane amount ...

Hope this helps too ...

by george_koitchev

The SDRAM works at 3.3 volts and the EDO works at 5. Your motherboard must have a jumper for memory voltage selection and you have to set it up. If you are wondering what exactly is the jumper (e.g. no booklet), try the closest to the memory banks.

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