No. Because the architectures (design) are not equals and the PCI Express have more speed on Its bus.
No, a processor is not fixed to the motherboard. Most modern processors are designed to be easily removable and replaceable using a socket on the motherboard. This allows for easy upgrades or replacements without replacing the entire motherboard.
No, you typically cannot replace the wheel bearing without also replacing the hub, as they are often integrated components.
Yes, it is possible to replace sliding glass doors without replacing the frame by finding doors that fit the existing frame dimensions.
No, there is no repair if it it clogged. Replace it.
Yes, unless the converter is clogged there is no reason to replace it.
Yes, it is possible to replace just the toilet tank without replacing the entire toilet.
yes if the unit is not baked
No, they are a matched machined set.
My car is going through the same issue with the A/C. You CAN replace the compressor clutch without replacing the compressor, but the caveat is that you can't tell if the compressor is any good without a clutch. So basically you are gambling that the compressor will still be good by only replacing the clutch. Hope this helps!
Since the motherboard serves as mounting or connecting base to all components in a computer you will have to diassemble almost everyting in order to replace it. You should be able to do it without diassembling the optical and hard drives and the power supply.
A very useless motherboard
No, this is not possible. The chipset on your motherboard controls your interfaces, and if it's programmed to understand AGP instructions, it cannot use PCI express instructions. The chipset is soldered onto the board, and cannot be replaced. Not to mention you can't plug a PCI express card into a AGP port, or a regular PCI port, so you don't even have anyplace to plug the card in. In short, if you must have PCI express, and your motherboard isn't built for it, your only option is to get a new motherboard.