zamenhof@csli.Stanford.EDU (Dan Fish) (02/17/91)
Fellow NeXTers: Here is a question for you hardware gurus. If you replaced the RAM in a NeXT machine with 35ns DRAMs, would it improve the performance at all? If so, how much? ################################################## ---==-----=======------- # Daniel Fish Proud NeXTstation OwNER # ---====-===========----- # Stanford University Symbolic Systems Junior # ---=================---- # Plain email only to zamenhof@csli.stanford.edu # ---====-===========----- ################################################## ---==-----=======-------
kls30@duts.ccc.amdahl.com (Kent L Shephard) (02/22/91)
In article <17779@csli.Stanford.EDU> zamenhof@csli.Stanford.EDU (Dan Fish) writes: >Fellow NeXTers: > Here is a question for you hardware gurus. If you replaced the RAM in >a NeXT machine with 35ns DRAMs, would it improve the performance at all? >If so, how much? > >################################################## ---==-----=======------- ># Daniel Fish Proud NeXTstation OwNER # ---====-===========----- ># Stanford University Symbolic Systems Junior # ---=================---- ># Plain email only to zamenhof@csli.stanford.edu # ---====-===========----- >################################################## ---==-----=======------- No it won't speed up the machine and I haven't seen any 35ns DRAM. The fastest DRAM I've seen is about 60ns. Most computers (including NeXT) have no way to determine memory speed. I don't know of any machine that does since rams in general don't send memory ready signals to the CPU. This means that memory access timing is built into the computer hardware and usually (IBM-PC clones) wait states are selected by a setup program that puts values into the timer for the wait state generator or by setting jumpers on the CPU board. Kent -- /* -The opinions expressed are my own, not my employers. */ /* For I can only express my own opinions. */ /* */ /* Kent L. Shephard : email - kls30@DUTS.ccc.amdahl.com */