The legs of the P-III and P-IV green fiber cpus are soldered on and can easily be separated from the cpu housing by heating the cpu from the bottom with a hand torch and a giving the hot cpu a gentle tap on the side of a ceramic or metal dish. Don't overheat the cpu, just melt the solder or the cpu will catch fire and produce some very toxic smoke. Do this outside or under a fume hood. The hot pins will all fall of along with the capacitors and you can hand sort them from the tan colored capacitors when everything cools.
If you use tight control on the heating of the pins you can harvest them and leave the capacitors behind still attached to the cpu housing since the capacitors tend take a little more heat to remove than the exposed pins do.
You'll get a bit of solder mixed in with the pins, break up any solder clumps you can and remove as much of the cold solder as you can by hand. The remaining solder and the pins will all get boiled in the hot 10-30% HCl (muriatic) acid, leaving the gold behind as a fine black/brown powder and possibly some foils after the bulk of the pins dissolve.
The base metal of the legs is kovar which is notoriously hard to dissolve. A portion of the solder remaining on the pins will be dissolved, the rest stays behind as a dark colored powder mixed in with the gold.
Once the HCl has removed as much base metal as it will dissolve (no more tiny bubbles when a little fresh HCl is added), pour it off and treat the residual solids with a second batch of hot HCl acid as a clean up stage. Allow to cool to 20C, then pour/siphon off the dirty acid being very careful not to pour off any of the solid sediments along with the acid.
Now treat the solid sediment using the Modified Poor Man's AR method
starting at step #3:
Modified Poorman's AR
The green cpu housings have only traces of gold left in them and will require crushing and/or incineration to get the last of the gold out of them, so put them aside until you are properly equipped to handle them. The bulk of the gold in these new cpus is on the legs.
You can use also the Modified AR method to process the ceramic cpus.
The memory fingers can be harvested and processed using the Acid Peroxide method as demonstrated on my website videos.
Here's some yield info:
Memory Finger Yields
I would start with a small sample of the various types of scrap you have (don't mix scrap types) and get acquainted with each process before jumping into a large batch. Start very small until you know what you are doing, then scale up.
You have a lot of work ahead of you with those cpus and your returns will be minimal due to the age of the bulk of the cpus (they are relatively new).
Steve