The group of 4 CPUs and the two below to the right are all pinless CPUs, you should check the numbers on those and see if any are i series that match the
test and buy list.
The two to the left can't be sure without seeing the other side for metal or not.
The bottom one appears to be black fiber.
Left top board is CD/DVD board, the two below that are off some sort of drive, do you know if it was a hard drive, tape drive, floppy drive, etc...?
The top right at least low peripheral. Motherboard below that looks like a P4 small socket, possibly with a copper heatsink behind the ports. And last, low peripheral at least, although I'm leaning towards high peripheral.