Guest thanatoid Posted July 6, 2007 Posted July 6, 2007 Re: Question about SIMM and DIMM combination in an old computer - UPDATE Thank you VERY much to all who replied (quite extensively in some cases) to my post and have helped me solve the problem. WARNING: A long and boring description of what I did follows between the two rows of asterisks. ***** I had no idea whatsoever that DIMMs ran on 3.3 or 5V. I have had the 4 16MB SIMMs since the day I got the computer. Of course, my DIMM does not say which voltage it likes, but I read on one site that it really couldn't damage anything if the voltage was wrong ("couldn't damage" meaning, I suppose, AOT just screwing everything up). So the first thing I checked was the voltage jumpers, and they were set to 3.3V. The 64MB DIMM was in the slot right next to the 4 SIMMs, a combination which the manual said would not work. Well, it worked, even with the wrong voltage, just not very well. As I said, I had 80 MB of RAM which made no sense, and the computer ran very badly - I was getting constant BSODs, fatal exceptions, address problems, and weird messages I've never seen before like "WindowsAspect1 already open" (or something) - in general, stuff I am really (really) not used to seeing. I was beginning to think that my computer might not make to its 10th birthday on Sept. 20 (although that IS still 2.5 months away). Anyway, after trying all the possible combination of the 5 sticks and the two voltages, I gradually arrived at the final result. The person who said I would not get more than 96 MB out of my available total of 128 (4x16 and 1x64) was correct. (This in contrast both to the MB manual and several web sites which I was able to visit between the constant crashes etc.) All the stick/voltage combinations except the two that worked gave me between 20 and 80 megs and caused a variety of weird problems. In one case, everything worked fine, no crashes, BSODs etc, but no mouse. Keyboard, yes, but no mouse. I have ended up using the 64MB DIMM at 5V and 2 16MB SIMMs, and there are two configurations which work equally well, both providing one or two empty slots between the DIMM and the two SIMMs. I am amazed that the MB did not crack, because I took the DIMM in and out of both slots several times, and it did not get any easier except for the slightly reduced fear factor. Installing SIMMs OTOH, as you know, is a piece of cake. That's progress I guess. ***** It is too early to say whether the whole thing was worth it, but it certainly kept me busy for a few hours, and 96MB of RAM is 50% more than 64 - in fact, I now have 62 or 64 free once 95B has booted up with no other programs running. I have never had serious memory problems, but this is bound to make SOME difference in the overall performance. AND I have two spare 16MB EDO SIMMs which is nice (I'm going to see if they work with a 486/66 HP Vectra I have sitting around). Thank you AGAIN to all who responded. Best regards t. -- Everyone who installs Vista is insane.
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