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Mac Forum / General / Portable Macs / July 2007Powerbook G4/1,67 with 4G RAM?
Hello. My first post was on comp.sys.mac.hardware.misc. This is a supersede to the more suitable comp.sys.mac.portables. About the last generation Powerbook G4/1,67MHz 15-inch with 1440 high resolution [1]: Has anyone ever tried to install 2 x 2048M = 4096M memory modules? Recently there are modules with the correct PC2-4200 533MHz DDR2 specifications of 2048 Mega Byte which haven't been available at that time. The developer notes [2] clearly declare 2048M as the maximum configuration level. Does this concern Apple's own operating system? Is this a restriction of the hardware? Or does the restriction apply to the Openfirmware? The target operating system will be Linux. Soon after this last version Apple discontinued the legendary Powerbook series and published the Intel Macbooks. They had the same memory modules like the last Powerbooks but with 4096M maximum configuration. Regards, Massimo [1] http://support.apple.com/specs/powerbook/PowerBook_G4_15-inch_Double-Layer_SD.html [2] http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs -G4/15inchPowerBookG4/15inchPowerBookG4.pdf Massimo Burcheri <massimo.burcheri@gmx.de> schrieb: <(null)> > The developer notes [2] clearly declare 2048M as the maximum configuration > level. Does this concern Apple's own operating system? Is this a > restriction of the hardware? Or does the restriction apply to the > Openfirmware? > The target operating system will be Linux. I have never seen a G4 with more than 2GB. I guess it is a limitation of the chipset. Florian In article <C2BEB6FC-BDC9-44F8-B82B-B6AEF6E6C371%edv@zschocke-berlin.de>, Florian Zschocke <edv@zschocke-berlin.de> wrote: > Massimo Burcheri <massimo.burcheri@gmx.de> schrieb: > <(null)> [quoted text clipped - 9 lines] > > Florian Just because Apple does not support it does not necessarily mean it can't be done. One example is the recent MacBook which Apple says has a 2 GIG limit. It has been well documented and actually proven that the MacBook will take 3 GIGS of memory. > Just because Apple does not support it does not necessarily mean it > can't be done. One example is the recent MacBook which Apple says has a > 2 GIG limit. It has been well documented and actually proven that the > MacBook will take 3 GIGS of memory. Exactly. Generally the 32bit architectures have a 4096M addressable memory limitation using the linear "flat memory model". As for x86 there is still an area needed for PCI mapping so maybe 3G or 3.5G can be available. I don't know how the PCI mapping is handled on PPC. Then there has been introduced the PAE expansion in order to address up to 64G physical memory on 32bit systems using additional address bits. The conversion into 36bit adresses however costs performance. Anyway, the modules are ordered, I'm going to try. Eventually 3G or more could be available. Regards, Massimo Massimo Burcheri <massimo.burcheri@gmx.de> schrieb: > Anyway, the modules are ordered, I'm going to try. Eventually 3G or more > could be available. I guess you will waste you money. See: http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs -G4/PowerMacG4/4Expansion/chapter_5_section_2.html#/apple_ref/doc/uid/TP30000306 -TPXREF107 Florian > I guess you will waste you money. See: Of course I asked if I can return the 2G modules if they don't fit.:) > About the last generation Powerbook G4/1,67MHz 15-inch with 1440 high > resolution [1]: Has anyone ever tried to install 2 x 2048M = 4096M memory > modules? In other words, does the G4 support PAE? Massimo > > About the last generation Powerbook G4/1,67MHz 15-inch with 1440 high > > resolution [1]: Has anyone ever tried to install 2 x 2048M = 4096M memory > > modules? > > In other words, does the G4 support PAE? http://support.apple.com/specs/powerbook/PowerBook_G4_15-inch_Double-Laye r_SD.html http://support.apple.com/specs/powerbook/PowerBook_G4_15-inch_1_67-1_5GHz .html > http://support.apple.com/specs/powerbook/PowerBook_G4_15-inch_Double-Laye > r_SD.html Are you sure that will answer my question? Haven't I posted the same link? > > http://support.apple.com/specs/powerbook/PowerBook_G4_15-inch_Double-Laye > > r_SD.html > > Are you sure that will answer my question? Either that one, or the one that followed it (not being completely clear as to which late-version PowerBook you have). Apple doesn't support 4GB RAM on either model, according to the linked pages. > Haven't I posted the same link? No idea; didn't see your earlier post. |
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