CompuServe Messages

RAM for A3000?

    26-Nov-91 10:49:53
Sb: #41771-RAM for A3000?
Fm: Steve Ahlstrom 76703,2006
To: Douglas Bullard 71330,214
Douglas, If you've already got 6M in your 3000, you're not going to like the answer. In the 3000, when you want to expand the ram from a stock machine, you have to make an important decision. There are sockets in the 3000 so you can just buy ram and plug it in. You can get the ram in 2 flavors, 256 x 4 zips or 1M x 4 zips. If you go with the 256 x 4s (which apparently you did) you can only get 6M in the machine (ie, you need 8 chips per meg, and you've only got 32 sockets). Had you gone with the 1M x 4s, you get 4M per 8 chips. So, you're basically stuck by making the wrong choice at the beginning. To expand beyond what you've got now you have 2 choices, 1 "right" choice, and one "bad" choice, probably neither than you'll be happy with. The "right" choice is to pull out the 32 256 x 4 zips you have now, sell 'em, give them away, wrote them off as a bad purchase, whatever, and buy some 1M x 4 static column zips (32 of them plus your 2M chip ram will give you 18M in the box). The "bad" choice is to install an A2000 memory expansion board. The problem there is that those boards are only 16 bit so you'll be cutting the speed of your 3000 by 50% whenever that ram is accessed (there are no 32 bit memory expansion boards for the 3000 currently on the market that I know of). Now, all the above is based on my assumption that the ram you currently have in your machine is 256 x 4 zips. With a 6M configuration it _is_ possible that you've got 2M of chip ram and 4M (8 chips) of 1M x 4s. However, most people choose the less costly option of going with the 256 x 4s at the beginning and put themselves in a bind when they want to expand later. -sja