Installation problem with Mac Pro RAM
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From: Salmon Egg on 14 Feb 2010 05:42 [This is a repost with minor typos removed.] Encouraged by posts here, I installed a 4GB memory module in my Mac Pro. The physical insertion of the RAM seemed easy and trouble free except for not being sure what to do when doing it for the first time. There were three 1GB modules in slots 1, 2, and 3. This tells me that on my model Mac Pro, memory does not have to be added in matching pairs. The easiest thing to do was to insert the new 4GB module into slot 4. Upon turning on the machine I got no startup chime and the power indicator was flashing. I thought that maybe the 4GB had to be in another slot. Again, I took the easiest path and interchanged the position of the 4GB module with the 1GB module in slot 1. That put 1GB modules in slots 2, 3, and 4 and the 4GB module in slot 1. I had the same result--no startup chime and a flashing power indicator. I next removed the 4GB module without changing positions of the 1G modules. The computer started up just fine. I did get a message that the modules were not in the optimum positions. Nevertheless, I am using that configuration as I am preparing to post this message. There is a good chance that I will go to Fry's tomorrow where I bought this module. I would like to resolve the problem before then with the hope that I will not have to make a complaint. Meanwhile, I will try to find out what the optimum positions for the memory modules are. Also what is the significance of the flashing power indicator. Any help that I receive that shortens my learning time will be gratefully appreciated. -- An old man would be better off never having been born.
From: Salmon Egg on 14 Feb 2010 10:51 In article <0056c5ff$0$2939$c3e8da3(a)news.astraweb.com>, JF Mezei <jfmezei.spamnot(a)vaxination.ca> wrote: > Have you tried with only the 4gb memory plugged into slot 1 and others > slots left naked ? THIS WAS A GREAT IDEA! As I am writing this, the 4GB module in Slot 1 is the ONLY installed memory module in my machine. It is working well. According to the message generated, it is also in the correct slot. Moreover, the memory is not grossly defective. I am now left with the problem of installing the remaining memory consisting of three 1GB modules. This leaves me to ask two questions. 1. Is one 4GB with three 1GB modules a viable combination? There always seems to be the possibility of a gotcha. 2. What is the proper slot for the 4GB module? I have tried using all modules with the 4GB in Slot 1 and also in Slot 4. Neither of these combinations seemed to work. It is possible that the modules were not seated properly, but I think that is unlikely. In the absence of a memory location map, which I am still trying to dig out of the Apple site, my strategy will be to add a 1GB module to Slot 2. and go on from there. Bill -- An old man would be better off never having been born.
From: Mike Rosenberg on 14 Feb 2010 10:57 Salmon Egg <SalmonEgg(a)sbcglobal.net> wrote: > I am now left with the problem of installing the remaining memory > consisting of three 1GB modules. This leaves me to ask two questions. > > 1. Is one 4GB with three 1GB modules a viable combination? There always > seems to be the possibility of a gotcha. > > 2. What is the proper slot for the 4GB module? > > I have tried using all modules with the 4GB in Slot 1 and also in Slot 4. > Neither of these combinations seemed to work. It is possible that the > modules were not seated properly, but I think that is unlikely. > > In the absence of a memory location map, which I am still trying to dig > out of the Apple site, my strategy will be to add a 1GB module to Slot > 2. and go on from there. Apple has specific instructions in the manual that came with your Mac Pro. Follow those instructions and things should be fine. Vary from them at all and the Mac won't access all the RAM. -- My latest dance performance <http://www.youtube.com/watch?v=I_9pudbFisE> Mac and geek T-shirts & gifts <http://designsbymike.net/shop/mac.cgi> Prius shirts/bumper stickers <http://designsbymike.net/shop/prius.cgi>
From: Jolly Roger on 14 Feb 2010 14:26 In article <1jdwgze.2q7lfh1wlpnnjN%mikePOST(a)TOGROUPmacconsult.com>, mikePOST(a)TOGROUPmacconsult.com (Mike Rosenberg) wrote: > Salmon Egg <SalmonEgg(a)sbcglobal.net> wrote: > > > I am now left with the problem of installing the remaining memory > > consisting of three 1GB modules. This leaves me to ask two questions. > > > > 1. Is one 4GB with three 1GB modules a viable combination? There always > > seems to be the possibility of a gotcha. > > > > 2. What is the proper slot for the 4GB module? > > > > I have tried using all modules with the 4GB in Slot 1 and also in Slot 4. > > Neither of these combinations seemed to work. It is possible that the > > modules were not seated properly, but I think that is unlikely. > > > > In the absence of a memory location map, which I am still trying to dig > > out of the Apple site, my strategy will be to add a 1GB module to Slot > > 2. and go on from there. > > Apple has specific instructions in the manual that came with your Mac > Pro. Follow those instructions and things should be fine. Vary from them > at all and the Mac won't access all the RAM. Right. I don't understand why he didn't read the instructions before inserting a stick of RAM into the machine to begin with. Puzzling... I certainly figured cracking open the manual wasn't too much trouble when I upgraded mine to 6 GB! -- Send responses to the relevant news group rather than email to me. E-mail sent to this address may be devoured by my very hungry SPAM filter. Due to Google's refusal to prevent spammers from posting messages through their servers, I often ignore posts from Google Groups. Use a real news client if you want me to see your posts. JR
From: Mike Rosenberg on 14 Feb 2010 14:39 Jolly Roger <jollyroger(a)pobox.com> wrote: > > Apple has specific instructions in the manual that came with your Mac > > Pro. Follow those instructions and things should be fine. Vary from them > > at all and the Mac won't access all the RAM. > > Right. I don't understand why he didn't read the instructions before > inserting a stick of RAM into the machine to begin with. Puzzling... I > certainly figured cracking open the manual wasn't too much trouble when > I upgraded mine to 6 GB! The thing is, prior Apple tower models weren't nearly as a big deal. The G4 models took one DIMM at a time with no placement rules, you just had to have the right specs. The G5 models required matched pairs of DIMMs installed symmetrically. It's easy to explain here what someone needs to do. Not so with the Mac Pro line. Mine came with two 1 GB DIMMs installed and I added a 4 GB DIMM. Figuring out the correct locations on my own would have taken too much trial and error since it was counter-intuitive for me. -- My latest dance performance <http://www.youtube.com/watch?v=I_9pudbFisE> Mac and geek T-shirts & gifts <http://designsbymike.net/shop/mac.cgi> Prius shirts/bumper stickers <http://designsbymike.net/shop/prius.cgi>
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