Earlier 486 motherboards that were upgradable to a Pentium CPU. The motherboard had a ZIF socket for easy chip replacement and supported the higher Pentium speeds. See Pentium. THIS DEFINITION IS ...

In the mid-1990s, separate blue-colored OverDrive sockets were added to some 486 motherboards for future upgrades. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.