For instance, a user trying to install an x1 card into an x16 slot will discover that it physically fits but might not use the entire bandwidth availabgolden 777 slots apkle, even though PCIe x16 slots are made for high-performance graphics cards. This discrepancy may result in less than ideal performance or even complete malfunction. Also, proprietary designs frequently used by motherboard manufacturers can make compatibility problems even more difficult to resolve.