Thanks for all the help. If anyone can think of any other possibility, please feel free to contribute. I am also leaning toward the probability there is a timing problem with the RDRAM. However I will live with it.
One thing I will experiment with is to try the sticks (2 by 2) and check under BIOS as well as under Windows. Maybe it was because I used several different brands of RDRAM, still it did not seem to matter which pair I put in last; the last pair always gave me the same anomaly.
So once again, thank you for your help with my old machine.
Hi. I know this is probably something you're not even looking at now; however, just in case you are...
There were some Intel chipsets that required a larger reserved memory area when installed memory == 4GB. It would never report 4GB, no matter what. This sounds very much like that. I don't know off the top of my head which chipset is in that model of MPro, but this may be a possibility.
Now, I may be way off here, too, because I don't remember if this affected only dual processor (way back then when there was only one core per socket
) or if it also affected uni-processor models as well. I know we ran into it a lot with some of the xSeries servers a few years back -- customers would complain that they were missing 512MB of memory, but the system actually reserved it (and I can't remember what for, exactly... adapter BIOS shadowing? I don't remember; sorry).
Anyway, FWIW, I thought I might throw that out at you. I have a little experience in this area, being that I work for IBM in the x86 server and professional workstation side -- when we still had them.
Hope this helps.
TonyHome machines: Thinkpad T43 2668-44U; Intellistation ZPro 9228-72U, and the 2645s that will never die
Work machine: Thinkpad T61 7659-A71