CompuServe Messages

I have two megs worth of Cardco expansion ram. Everybody tells me that expansion ram is faster then internal ram. Well all the tests that I have done with my Amiga show that the Cardco ram is definitely slower. My flight simulater runs slower, my assembler runs slower, and for next loops in amiga basic run slower. The biggest difference was the for next loop. The external ram requires almost 50% more time to run the loop as did the internal ram. What I would like to know is if anybody else has had the same problem with the cardco ram or anyother ram? I have a theory as to why Cardco ram runs slower. The amiga runs at 7.16 mc which means that the access time required to run full speed is 140ns. The chips in the Cardco expansion are 150ns, which is a little slow so the 68000 has to wait on it. The problem with this theory is that the chips in the internal ram are also 150ns. I think Commodore probably buys ram chips by the gross from chip makers and then grades them picking out the 140ns and faster. They then probably sell the ones that failed to companies like Cardco. This would explain why the slowness in my Cardco ram. If anybody has there own theory or just plain knows what the story really is I would appreciate hearing from you. The reason for all this concern is I'm trying to decide if it would be worth it to buy 120ns chips to replace the 150ns chips that are already in the Cardco expansion. The faster chips are probably very expensive so I don't want to buy them if it isn't going to make a large difference.