Were the onboard chips 80ns and the chips on your SIMM 60ns? Would something like that explain the speed boost?
i was thinking about that…
(and that might be some of whats going on)
My theory is more that the memory controller has to ASINC the memory bus in order to use that stupid 4megs of slow old ram.
With that 4mb's not on there… the memory controller switches to synchronous mode. with a full pipe to the 72 pin simm…
The 24 pin ram might be faster ram all the way around… not in just NS.
I think that 20pin ram is old… and was thrown on there to save money and to give the customer a value added feature of some onboard ram.
after all the LC475 and Q605 WERE value added machines…. not performance…
So yeah i am saying the memory controller directly allowing greater performance.
Not having to slow everything down as the same speed is the S**T 4megs onboard.
I have no wiggle room in my budget.. -- and i have no idea as if those ram chips will work.
-- i do see they are 20pin… and i'm sure that is good… but other then that i have no idea… and no $$ budget.
-- i am almost thinking populating that spot with any 20pin ram chip is just going to slow the system back down….
WITCH leads me to now be more interested in trash80's idea
viewtopic.php?f=29&t=22643
he's probably on to something … Yeah … for sure…!
because 256 megs of ram in a LC475/Q605 would be more sick…
using 2 matchings simms with all 24 pin chips….
i think we need to look up a data sheet on the memory controller…. we might have found out its greater capabilities
----silly apple purpously slowing down our computers on us!!!!!!!!!!!!!!!!