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Mac Forum / General / Hardware / May 2007a DIMM mystery - SOS
I need urgent advice...please... I bought a 1 GB DDR2 SDRAM with speed PC2-4200S-444 DIMM for my 1.67 GHz Aluminum PowerBook G4 but it shows up as a PC2-3200S-288 in the System Profiler. The seller tells me that ############################################################################# Apple system profiler has issues properly reading third party memory. It has been this way for some time the memory performs properly but is read wrong. ############################################################################# QUESTION 1. Could the seller's explanation be correct? QUESTION 2. How can I determine if in fact the memory performs as a PC2-4200S-444 and not as a PC2-3200S-288? Thanks! /PaulN > QUESTION 2. How can I determine if in fact the memory performs as a > PC2-4200S-444 and not as a PC2-3200S-288? I seem to recall that the Aluminum Powerbook models did not use PC4200 memory; their RAM bus was PC2700. If that is the case, then you can put faster memory in there, and it will work, but at the slower speed.  SignaturePhotography, kink, polyamory, shareware, and more: all at http://www.xeromag.com/franklin.html In comp.sys.mac.system tacit <tacitr@aol.com> wrote: > > QUESTION 2. How can I determine if in fact the memory performs as a > > PC2-4200S-444 and not as a PC2-3200S-288? > I seem to recall that the Aluminum Powerbook models did not use PC4200 > memory; their RAM bus was PC2700. If that is the case, then you can put > faster memory in there, and it will work, but at the slower speed. Nope, they use PC4200. Sorry. /PaulN > > I seem to recall that the Aluminum Powerbook models did not use PC4200 > > memory; their RAM bus was PC2700. If that is the case, then you can put > > faster memory in there, and it will work, but at the slower speed. > > Nope, they use PC4200. Sorry. Take a look at this: http://www.datamemorysystems.com/AMM12.asp They say some 1.67 GHz Aluminum PowerBook G4s use PC2700 and some use PC2-4200. Signature<http://designsbymike.biz/macconsultshop.shtml> Mac-themed T-shirts <http://designsbymike.biz/musings.shtml> Humorous/muckraking T-shirts <http://designsbymike.biz/prius.shtml> Prius shirts & bumper stickers <http://cafepress.com/comedancing> Ballroom dance-themed shirts & gift > > > I seem to recall that the Aluminum Powerbook models did not use PC4200 > > > memory; their RAM bus was PC2700. If that is the case, then you can put [quoted text clipped - 8 lines] > They say some 1.67 GHz Aluminum PowerBook G4s use PC2700 and some use > PC2-4200. The DDR2 PowerBooks used PC2-4200, but underclocked it to PC2-2700. See <http://developer.apple.com/documentation/Hardware/Developer_Notes/Macin tosh_CPUs-G4/15inchPowerBookG4/index.html> SignatureMvh./Regards, Niels Jørgen Kruse, Vanløse, Denmark > In comp.sys.mac.system tacit <tacitr@aol.com> wrote: > [quoted text clipped - 6 lines] > > Nope, they use PC4200. Sorry. /PaulN Actually. The document that came with my 1.5GHz 15" AL powerbook clearly states... PC 2700 DDR 333 SO-DIMM Further, if you go to a _reputable_ memory vendor like Crucial or Kingston you'll see they recommend the PC 2700 SO-DIMMS as well. e.g. http://www.crucial.com/store/listparts.aspx?model=PowerBook+G4+1%2E5GHz+%2815%2D inch+Display%29 http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=16683&mfr= Apple&model=PowerBook+G4+15&root=&LinkBack=&Sys=16683-Apple-PowerBook+G4+15-inch +1.0-1.67GHz+%28PC2700%29&distributor=0&submit1=Search Now http://www.ec.kingston.com/ecom/configurator_new/modelsinfo.asp?SysID=16683&mfr= Apple&model=PowerBook+G4+15&root=&LinkBack=&Sys=16683-Apple-PowerBook+G4+15-inch +1.0-1.67GHz+%28PC2700%29&distributor=0&submit1=Search Now Now the 1.67 15 and 17 inch AL powerbooks do take the PC 4200 SO-DIMMS. Go search based on your model and you'll get the straight scoop. Signaturethepixelfreak In comp.sys.mac.system thepixelfreak <not@dot.com> wrote: > > In comp.sys.mac.system tacit <tacitr@aol.com> wrote: > Now the 1.67 15 and 17 inch AL powerbooks do take the PC 4200 SO-DIMMS. That's what I keep saying. /PaulN > I need urgent advice...please... > [quoted text clipped - 14 lines] > > QUESTION 1. Could the seller's explanation be correct? Doesn't sound right to me. It sounds like you've either got memory that _is_ slower that what you paid for and need, or that's claiming to be. Either way I'd return it and find a better vendor. Where'd you buy the stuff you have? > I need urgent advice...please... > [quoted text clipped - 14 lines] > > QUESTION 1. Could the seller's explanation be correct? Highly suspicious. Ask him for a reference. > QUESTION 2. How can I determine if in fact the memory performs as a > PC2-4200S-444 and not as a PC2-3200S-288? Google is your friend. Check out the DIMM manufacturer's specs, or the chips themselves. Example: I have on my desk an Apacer RAM module with a label 512MB UNB PC3200 CL3, so it claims to be a PC-3200, Clock Latency=3. If the label was missing, I would take a look at the chips: 16 chips Infineon of the type HYB25D256800BT-5 (you may need a magnifying glass). I google for that, and the first match is http://www.intel.com/technology/memory/ddr/specs/DS_256M_D14_5_v0.9.pdf where I can find that those chips are of the type DDR400, 3-3-3, able to operate at 200MHz. Going to the Wikipedia http://en.wikipedia.org/wiki/DDR_SDRAM (I am sure there are other references) I can see that the memory at 200MHz using DDR400 chips is called PC-3200. The label is then correct. > Thanks! /PaulN FWIW. _x. -- Only one "o" in my e-mail address In comp.sys.mac.system Xavier Llobet <Xavier.Lloobet@epfl.ch> wrote: > > I need urgent advice...please... > > [quoted text clipped - 14 lines] > > > > QUESTION 1. Could the seller's explanation be correct? > Highly suspicious. Ask him for a reference. > > > QUESTION 2. How can I determine if in fact the memory performs as a > > PC2-4200S-444 and not as a PC2-3200S-288? > Google is your friend. > Check out the DIMM manufacturer's specs, or the chips themselves. > Example: > I have on my desk an Apacer RAM module with a label 512MB UNB PC3200 CL3, > so it claims to be a PC-3200, Clock Latency=3. > If the label was missing, I would take a look at the chips: 16 chips > Infineon of the type HYB25D256800BT-5 (you may need a magnifying glass). > I google for that, and the first match is > http://www.intel.com/technology/memory/ddr/specs/DS_256M_D14_5_v0.9.pdf > where I can find that those chips are of the type DDR400, 3-3-3, able to > operate at 200MHz. Going to the Wikipedia > http://en.wikipedia.org/wiki/DDR_SDRAM > (I am sure there are other references) I can see that the memory at > 200MHz using DDR400 chips is called PC-3200. The label is then correct. I am sorry. I don't understand your response. Which label is correct? PC2-4200S-444 or PC2-3200S-288? /PaulN [sorry for the long quote] > In comp.sys.mac.system Xavier Llobet <Xavier.Lloobet@epfl.ch> wrote: > [quoted text clipped - 51 lines] > I am sorry. I don't understand your response. Which label is correct? > PC2-4200S-444 or PC2-3200S-288? /PaulN [sorry for the long quote] How could I know? I did suggest you to look (physically, with a magnifying glass) at the chips and identify them. _x. -- Only one "o" in my e-mail address In comp.sys.mac.system Xavier Llobet <Xavier.Lloobet@epfl.ch> wrote: > I did suggest you to look (physically, with a magnifying glass) at the > chips and identify them. Got it. I just did that. The label is 7ED22 D9GMH. Googling it gives 36 mostly Chinese web pages. I have no idea what they mean. It looks like D9GMH refers to overclocking. I still don't know if I have PC-4200 or PC-3200 DIMMs. Can you help? /PaulN > In comp.sys.mac.system Xavier Llobet <Xavier.Lloobet@epfl.ch> wrote: > > I did suggest you to look (physically, with a magnifying glass) at the [quoted text clipped - 4 lines] > refers to overclocking. I still don't know if I have PC-4200 or PC-3200 > DIMMs. Can you help? /PaulN If my googling is correct, the brand should be Kingbox, from Taiwan, and the module should be red. Is that the case? All the references I've seen to these modules describe them as DDR2-800, which corresponds to PC2-6400, quite a fast beast, may I say. If the brand is indeed Kingbox, you may try to e-mail them (a snapshot could be helpful) at sales.tw@kingbox.com.tw _x. -- Only one "o" in my e-mail address > > Got it. I just did that. The label is 7ED22 D9GMH. Googling it gives 36 > > mostly Chinese web pages. I have no idea what they mean. It looks like D9GMH > > refers to overclocking. I still don't know if I have PC-4200 or PC-3200 > > DIMMs. Can you help? /PaulN > If my googling is correct, the brand should be Kingbox, from Taiwan, and > the module should be red. Is that the case? Nope, the module is standard black. The DIMM itself was "assembled" in Japan. You are a great detective. Thanks, PaulN > I need urgent advice...please... > [quoted text clipped - 19 lines] > > Thanks! /PaulN Don't trust OSX's System Profiler's memory display. It is often wrong. Try the System Profile option on the Apple Hardware Test that came with the Mac. It may be a partition on one of the install disks. Read the fine print on the discs. In comp.sys.mac.system Malcolm <malcolm@invalid> wrote: > Don't trust OSX's System Profiler's memory display. It is often > wrong. Try the System Profile option on the Apple Hardware Test that > came with the Mac. It may be a partition on one of the install disks. > Read the fine print on the discs. Wow!!! Great advice. Will try it later today. /PaulN |
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