Skip to main content
Home Forums 68kMLA LC 475 - swapped in full 68040 — #1
Post #1 by amatecha
Source Forum68kMLA
Category68k
Post DateThu, 28 Apr 2011 - 10:00
Original URLhttps://68kmla.org/bb/threads/lc-475-swapped-in-full-68040.22921/
Post
Successfully swapped in a full 68040 into my "new" LC 475 last night. It's a 33mhz '040 from my parents' old Quadra 950. No, sorry, it's not available - they only kept the motherboard which thankfully still had the CPU and all of the RAM on it! Anyway, I haven't yet done the resistor-swap to boost the speed to the proper 33mhz this CPU offers, but it should be a fairly straightforward task.



Probably the easiest upgrade ever.

I did find that the metal clips that hold down the heatsink do not have anything to "grab onto"... however I just squished the metal tabs inward more so they grab onto the side of the CPU socket a bit, to hold it in place. Works just fine. The heatsink is a bit heavy anyways and with the minor friction of the metal clips, it seems it should hold just fine as long as the computer isn't thrown around :p Later on I'll probably try to track down some type of adhesive thermal paste (if such a thing exists) to keep the heatsink on more securely.

So far the machine has 20mb of RAM total (4mb onboard + 16mb SIMM i found in an old Performa 6200CD I got from a thrift shop for $4....) Not too bad for a simple little machine, hey? I'll probably keep System 7.5.3 on it even though I feel inclined to run System 7.1 just for the improved performance. Probably no need though, now!! haha

mp.ls