How can I tell if I have a CardBus card?
When viewing the PC Card right side up, the area above the 68-pin connector on a CardBus card will have a gold grounding shield strip across it, typically with 8 small metal bumps (see photo below). This strip is necessary to prevent signal noise from interfering with CardBus’ high speed (33 Mhz) bus. These CardBus cards can only be used with CardBus slots — they are keyed to prevent insertion into 16-bit slots so that the card and the slot won’t be damaged by differing voltage requirements. 16-bit cards work in either type of slot, but CardBus cards only work in CardBus slots. How can I tell if I have a CardBus slot? The CardBus specification was released in 1995. Typically, any device manufactured before the second half of 1997 will almost certainly not have a CardBus capable slot. On Windows Based Laptop PCs: Access the ‘Device Manager’ by the means appropriate to the version of Windows installed. Typically right clicking on the computer icon ‘My Computer’, selecting the ‘Hardware’
