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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

G4 Yikes PCI Memory Question


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Let me preface my question by saying that I'm a computer novice and new forum member. I have a G4 PCI 400 mhz Yikes model. I had 320 mb (256 + 64) memory in it and wanted to upgrade to OSX. At the advice of a tech person at work, I put in two 512 cards in the first 2 slots and the old memory in the second 2. The machine recognizes the memory and is faster - but only sees the 512s as 256s. In other words I have 832 mb (256 + 256 + 256 + 64) when I should have 1344 mb. I have since read that the machine only accepts a maximum of 1 GB - but nowhere does it say 256 mb per slot. I ordered the memory from a mac place and specified my model - 512mb were acceptable. Rather than trying to exchange the cards - can someone tell me if there is a way (an upgrade perhaps) for the machine to recognize the memory? Thanks very much.

Dan
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Avalon

 
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The problem might be the fact that you have more than 1GB installed, so the memory controller will not recognise the full 512MB of the modules.

Try to put just 2 512MB modules in it, leaving the other 2 slots free. It might recognise the modules full 512MB, maxing it out at 1GB.

This can happen when you install more memory than the memory controller can handle...
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I'll try that - thanks a lot!
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I took out the smaller memory and just had the first two slots with the 512s in them. Now the computer only recognizes 512 total memory. Should be 1 GB right?
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Hmm...well, it seems that the Yikes! really has a limit of 256MB per slot.

You should return the 2 512MB modules and change them for 4 256MB modules, that's the only thing you can do.
Older computer are a little more picky when it comes to big RAM modules.
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