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You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > firmware update 4.1.8 on os9.1 doesn't recognize my ram?

firmware update 4.1.8 on os9.1 doesn't recognize my ram?
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Fresh-Faced Recruit
Join Date: Jan 2001
Location: hudson, nh, usa
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Sep 9, 2001, 08:47 AM
i was prompted to run the update for firmware 4.1.8 today (i'm running os 9.1) so i went through and did it and now it only recognizes 64 megs of ram (i have 192), anybody know how to make it see the other 128 megs?
Grizzled Veteran
Join Date: Mar 2000
Location: Massachusetts, USA
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Sep 9, 2001, 09:48 AM
This firmware update tightens the specs for RAM in Macs so they will be more reliable but it means that some older RAM is excluded. It caused this problem for a lot of people when it first came out a few months back.

First thing you should try to do is call the vendor you bought the RAM from and describe the problem and ask for a replacement module that is up to spec. A lot of vendors will replace it for you free of charge, except for maybe shipping.

If that doesn't work then try using DIMM First Aid to patch your unrecognized DIMM so it will be recognized. Only do this as a last resort if you cannot get it replaced however, since if slows the timing and could affect performance and it is not guaranteed to work.
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