The disadvantage is that the audio and modem functions take processor cycles to run, which slows down other tasks. When I opened my package, I found the wrong motherboard inside. I ordered the board from another vendor . Motherboard replacement is an involved process - you end up disconnecting and reconnecting every component of your computer. A good guide can be found at AnandTech .
Access gets harder once the board is installed.
I found that my motherboard screws were loose when I went to remove my old board. The FIC VA-503A uses DIP switches to configure CPU voltage, bus speeds and CPU multiplier, which is easier than setting multiple jumpers, but not as easy as being able to perform that setup in BIOS , which some boards allow you to do. When assembling my new system, the CPU did not drop into the socket as it should have. The K6-2 CPU had a bent pin on the outer center of a row, as if it had been knocked against something. My first attempts to boot up were met with dead silence.