I am running ACADE 2006 with an HP zd8230 laptop and have no problems whatsoever with changing drawings, even in MDI mode, with multiple drawings open. This laptop has 1GB of RAM, 128MB of video DRAM, and a 3.4 GHz Pentium 4. But I also have a Compaq R3000 with 512MB of RAM, shared video (leaving 384 MB of RAM for programs) and a 2.8GHz Pentium 4. It also has no problem with ACADE 2006 in MDI mode. I suspect that the new version of ACADE requires a bit more power. Not unlike Windows itself, which requires more and more computing power with each rendition. I remember when 64MB of RAM was unbelievable and a 528MB hard drive was HUGE. I even remember having a 286 at 12 MHz with 640K of RAM and a 10MB hard drive. I'm getting old for sure.
Doug McAlexander
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AutoCAD Electrical training and implementation support
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