[comp.sys.ibm.pc] Any difference in these RAM chips?

ndeng@EULER.BERKELEY.EDU (06/06/90)

I was to purchase some 1 Meg RAM chips and noticed there are some different
marks on the seemingly identical chips. One marked with "41000-8" and the
other "51000-8". I understand that "1000" means 1 meg and "-8" means 80ns,
but what is the meaning of the 4/5 prefix? Can one mix them together on a
RAM card or motherboard?

Please reply by email since I don't read the net regularly.

ndeng@euler.berkeley.edu