M52 PC 4200 PC 5300 DIMMS Blue Screen

[RiverFly]

I have had a couple of reports from our break-fix area of ThinkCentre M52's having intermittent blue screens that they have traced back to a possible memory issue. The M52 model numbers would be 8113-D5U and 8113-FBU. These systems both come from the factory with 1 512MB PC4200 DIMM. As part of our base package, we add a second 512MB PC4200 DIMM to bring the total memory to 1GB and have a matched pair. The machines in questions then have been upgraded with 2 1GB PC5300 DIMM's to bring the total memory to 3GB and maintain a matched pairs arrangement. In this configuration, the machines experience blue screens. All of the memory involved is IBM/Lenovo. Also, the PC5300 memory is listed as an accessory on the Dodson sheets for the M52's. In some troubleshooting, the break-fix fix area has found that if they remove one pair or the other, the machine seems to be stable, but when they use the combination of the PC4200 and PC5300 pairs, they get the blue screens. Have you had any other reports of this type of problem, or could we be missing something in the configuration? Any information that you can provide will be greatly appreciated. Thanks.