Got a good one here...for me anyways! I have an old Dell, the one I'm using now...& our old CTX which I'm tinkering with since retiring it. OK, here's the snag...I had bought a 128mb chip & put it in the CTX. When I found the Dell it only had the motherboard & processor so I scrounged up my extra ram & only had three 16mb chips, & the two original 32mb ones that were in the CTX. I tried the 32's in the Dell & it was a no go, wouldnt boot. I put the 16's in & it booted up but really slow. End of Chpt.1 Now, I decided to try the 128 in the CTX in the Dell, figuring it wouldn't work either but tried anyway. Booted right up. So I left it & two of the 16's in to give me 160. Now the fun part...I got an old IBM which didn't work at all so I stripped it for parts. It had two 128 & a 64mb chips in it. They won't work in the Dell, but will in the CTX. All the chips mentioned are non-ECC chips. The big question is....Why does the first 128 work in either computer & all the others only in a particular one??