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Lower and Upper Ram slots?

Submitted by PBookish on August 14, 2006 - 2:36am. PowerPC Macs

What's the difference and can you use two ram chips together?

I recently upgraded my 15" Powerbook G$ ram from 256 to 512 and I noticed the two slots.

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protocol6v's picture

No difference. Just more upgr

Submitted by protocol6v on August 14, 2006 - 4:26am.

No difference. Just more upgradability. I currently have a 1GB and a 512MB in my MacBook Pro and had the same with my 1.67GHz PowerBook G4 before i sold it to get this.

» MacBook Pro, 2.2GHz SR Core 2 Duo, 120GB HD, 2GB RAM,
PowerMac G5 Dual 2GHz, 3GB RAM, 1x 250GB HD, 4x 500GB HDs(Sonnet Tempo X4P), ATI Radeon 9650 256MB

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OK so I can reinstall my 256 Ram card?

Submitted by PBookish on August 14, 2006 - 5:10am.

Which card should go into the lower or upper slots? Does it matter?

So am I going to get 256+ 512 MB of RAM then? 768 MB?

I also read that G4 aluminum powerbooks had problems with the lower ram slots. Should I risk installing my old RAM card into one of the slots?

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dvsjr's picture

Of course you should

Submitted by dvsjr on August 14, 2006 - 1:44pm.

The upper and lower ram slots work the same.

Be bold, dare! Jam the Ram in! GO GO GO!

More ram is better! OS X loves RAM!

All kidding aside, there is so much info on the web, and on apple's website, you should go there and check it out.

Heres some: http://docs.info.apple.com/article.html?artnum=95132

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http://newtonserver.no-ip.com

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protocol6v's picture

Apple has a repair extension

Submitted by protocol6v on August 14, 2006 - 1:55pm.

Apple has a repair extension program for the powerbook g4 15" ram slots IIRC.

» MacBook Pro, 2.2GHz SR Core 2 Duo, 120GB HD, 2GB RAM,
PowerMac G5 Dual 2GHz, 3GB RAM, 1x 250GB HD, 4x 500GB HDs(Sonnet Tempo X4P), ATI Radeon 9650 256MB

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Look here for instructions

Submitted by Texas Mac Man on August 14, 2006 - 7:24pm.

Fix It Guides for Mac Laptops & Mini
http://www.ifixit.com/Guide/

The guides can be viewed on-line or you can download a PDF file.

Cheers, Tom
Mac Troubleshooting, Maintenance & Tips
http://www.geocities.com/texas_macman/MacTroubleshoot.html

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iantm's picture

Repair extension

Submitted by iantm on August 14, 2006 - 8:15pm.

The PowerBook G4 15" memory slot repair extension (at present) only includes the 1.5/1.67 ghz revision of the PB G4 15". As far as the issue is concerned, I haven't found that any user action causes it. So using both slots should not create any issues.

» - iantm
ACDT & ACPT
MacBook Pro 15" 1.83 ghz
07 focus zx3
Cannondale M700

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