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Too much RAM?
Authored by: aalegado on Aug 07, '01 01:20:12PM

The addressable-RAM limit is actually 1.5GB. Every G4 since the G4 AGP has the 1.5GB ceiling. The G4 PCI which preceded the G4 AGP was the G4 that used a modified G3 Yosemite ("Blue & White") motherboard and so shared the Yosemite's 1GB limit.

The thing about the limit is that until the G4 Digital Audio and G4 Quicksilver models (funny that the "G4 Digital Audio" wasn't called the "G4 2001" despite the fact that it was introduced at the start of 2001), G4s had 4 DIMM slots like the G3 Blue & Whites before it. So, like some older pre-PowerPC Macs, you could put more physical RAM In than the system would recognize. The Digital Audio and Quicksilver G4s have 3 DIMM slots so you can't do that but, and, at the same time, you lose some flexibility with the composition of your RAM.

My G4 has a 128, 2 256's, and a 512--a patchwork of capacities. A 3-slot does't let you Frankenstein your way to a a high RAM complement...if you want a lot of RAM, eventually, you have to throw something out. Of course, with 512MB DIMMs selling for $70 (give or take, mine costs $73.50 before shipping), you can afford to buy 1.5GB without killing the piggy bank.

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