I just wanted to ask one simple question. I am planning on selling my 68030 to do an upgrade as the 68030 is too slow or me and the 16 MB RAM will not cut it, even for the Amiga classic.
The question I am asking is...is the difference in speed that much high in a 68040 @ 33 Mhz over 68060 @ 50 Mhz that it is worth it to skip the 68040 all the together and attempt to get my hands on a 68060 @ 50 Mhz.
SO much misinformation being thrown around in this thread. the MYTH that 060's all run cool is not true and all 040's run hot is pure BS.
What determines is a 040 or 060 runs hot is its MASK in most cases,not that it is simply a 040 or 060.
The mask is generally what size the transistors are in the chip at the time of manufacture and probably how much gate resistance the transistors had at the time,(rudimentary explanation but this is the easy way to explain it). As the years went on,the manufacturing process managed smaller and more efficient transistors in the package which meant they ran cooler in most cases.
I have 060 chips here you could fry an egg on and 040 chips here barely that run luke warm .
many AMIGA accelerators used early mask 040's and 060's and they run hot. I have had warp engine 040/40mhz cards that ran pretty cool.I have had a new 4060dt 68060 from softhut in the last years that could heat the house(they really should have a fan/heatsink with the old 060 rev they come with-at least the one i had).
example. a XC68060 with the early mask of 01f43g will run quite hot.the slightly newer one with the 01g65v runs less hot,and a brand new mask of 71e41j on a MC68060 will run very cool.
same with the 68040's the chip i just desoldered off the 68040 apollo is a mask of 02E31F xc68040rc40M and runs very hot while the l88m mask 040 doesnt.There was even a 68040V that was 3.3v and ran fairly cool in its later masks but to my knowledge this was not used in any amiga accelerators.
So PLEASE quit spreading the nonsense that all 040's run hot and are unstable and all 060's run cool,. its simply not true.
Also many stability issues were caused by some Accelerators-*cough* apollo's *cough*(be it 040 or 060) having poor edge connectors and making bad connections. many 040 chips run no hotter than the some 030/50's.
To answer the original question: a 040/33 is good,but a 060 is better. go for the 060 if you can.
Mech