The easiest - and in my view best - way to speed up a Quadra 700 is simply to swap in the motherboard of a Quadra 800. It's the identical form factor and just goes right in.
You get a CPU speed upgrade from 25MHz to 33MHz, and in the process you also get a faster system bus, and faster 72-pin (as opposed to 30-pin) RAM. And it's a heck of a lot easier to find super-cheap/free 16MB 72-pin RAM SIMMs than it is to find 16MB 30-pin SIMMs.
As a side bonus, the RAM slots on the 800's mobo are oriented differently than on the 700's - so you can replace/upgrade RAM without having to take out the PSU and remove the drive cage.
And if you want still more speed, I would think the components on a Q800 mobo, already designed to run at 33MHz, would be much more tolerant of a 40MHz overclock than the designed-for-25MHz components on a Q700 board.
Of course, you might not want to cannibalize a perfectly good Q800 for this purpose - but on the other hand, the Q800 case is notorious for being a PIA to work on, so you could take the mobo and perhaps part out the PSU and CD drive to other 68kMLA members to help resurrect other Macs.
Best,
Matt
You get a CPU speed upgrade from 25MHz to 33MHz, and in the process you also get a faster system bus, and faster 72-pin (as opposed to 30-pin) RAM. And it's a heck of a lot easier to find super-cheap/free 16MB 72-pin RAM SIMMs than it is to find 16MB 30-pin SIMMs.
As a side bonus, the RAM slots on the 800's mobo are oriented differently than on the 700's - so you can replace/upgrade RAM without having to take out the PSU and remove the drive cage.
And if you want still more speed, I would think the components on a Q800 mobo, already designed to run at 33MHz, would be much more tolerant of a 40MHz overclock than the designed-for-25MHz components on a Q700 board.
Of course, you might not want to cannibalize a perfectly good Q800 for this purpose - but on the other hand, the Q800 case is notorious for being a PIA to work on, so you could take the mobo and perhaps part out the PSU and CD drive to other 68kMLA members to help resurrect other Macs.
Best,
Matt