I pulled the 040 from a Q840 to use in my Mystic CC (LC 575 mobo). I think I used a small screwdriver to very gently work the corners up. You don't want to bend any pins, so work them in a round-robin fashion, a little more each time around until it is free enough to pull straight out. It works great.I wanted to put a full 040 cpu from a quadra 800 into an LC630.
has anyone done that? did it work?
what is the best tool to use to do the swap?
I recently put a full 040 into a Performa 631 to make it a Quadra 630. The chips have the same pinouts, just the FPU is disabled on the LC models. There is another mod you can do the 63x motherboards to raise the clock to 40mhz by swapping around some resistors. You'll need at least a 33mhz CPU to do it, though. A 25 likely won't clock that high. If you're really lucky, you may find a 40mhz chip on ebay. I found someone selling 2 of them last month and grabbed them both. You don't see the 40mhz ones that often anymore, so if you see one with BIN, grab it because it'll be gone if you think too long about it or try to snipe it near the end with a big bid. I would guess that since overclocking reduces the lifespan of chips, underclocking should have the opposite effect since the chip is running slower and cooler than at it's rated speed.I wanted to put a full 040 cpu from a quadra 800 into an LC630.
has anyone done that? did it work?
what is the your favorite tool / method to use to pull the CPU?
TIA
It may only be warm due to the epoxy being an excellent insulator.I actually have one of those chip puller tools, and like everything else, the tool made for the job works the best.
Otherwise, in a pinch I use a tiny screwdriver and slowly pry around the processor until it pops out.
Now on overclocking... I have had a Quadra 605 with a full '040/25 overclocked to 42Mhz running for five years 24/7, and it is extremely stable and everything works. It feels snappier than my 840av did.
I have a heatsink from an old power supply epoxied to the processor with no fan, and after running hard, the heatsink is only warm to the touch.