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<blockquote data-quote="James" data-source="post: 61327" data-attributes="member: 7582">i'm no expert on Mac or computers in general, but I just upgraded the ram in my G5 and Mac seems to be a bit picky about what ram you give it. It doesn't want mixed ram. I had 2 256's pc3200 400mz installed and I stuck in 2 512's pc3200 433mz and the Mac wouldn't read them...wouldn't even boot... so I replaced them with 2 512's Pc3200 400mz and it grabbed them right up, so be sure to keep the same type of ram.No need to throw away your 128's, just add either a couple of 256's for a total of 768 or add couple of 512's and give yourself a boost to 1280. A boost up to a gig and a quarter would probably give you a nice boost in speed. Just make sure all chips are the same speed.I have been using Corsair ram for quite a while on two Ibm style gaming machines and have had real good luck with their stuff. That is what I put in the G5 too and it seems to like it quite well.James</blockquote>

[QUOTE="James, post: 61327, member: 7582"] i'm no expert on Mac or computers in general, but I just upgraded the ram in my G5 and Mac seems to be a bit picky about what ram you give it. It doesn't want mixed ram. I had 2 256's pc3200 400mz installed and I stuck in 2 512's pc3200 433mz and the Mac wouldn't read them...wouldn't even boot... so I replaced them with 2 512's Pc3200 400mz and it grabbed them right up, so be sure to keep the same type of ram. No need to throw away your 128's, just add either a couple of 256's for a total of 768 or add couple of 512's and give yourself a boost to 1280. A boost up to a gig and a quarter would probably give you a nice boost in speed. Just make sure all chips are the same speed. I have been using Corsair ram for quite a while on two Ibm style gaming machines and have had real good luck with their stuff. That is what I put in the G5 too and it seems to like it quite well. James [/QUOTE]

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