# IOPCILinkSpeed ``` enum IOPCILinkSpeed : unsigned int; ``` ## Overview\abstract Link speeds for SetLinkSpeed and GetLinkSpeed ## Topics ### Enumeration Cases [`kPCILinkSpeed_16_GTs`](/documentation/PCIDriverKit/IOPCILinkSpeed/kPCILinkSpeed_16_GTs) [`kPCILinkSpeed_2_5_GTs`](/documentation/PCIDriverKit/IOPCILinkSpeed/kPCILinkSpeed_2_5_GTs) [`kPCILinkSpeed_32_GTs`](/documentation/PCIDriverKit/IOPCILinkSpeed/kPCILinkSpeed_32_GTs) [`kPCILinkSpeed_5_GTs`](/documentation/PCIDriverKit/IOPCILinkSpeed/kPCILinkSpeed_5_GTs) [`kPCILinkSpeed_8_GTs`](/documentation/PCIDriverKit/IOPCILinkSpeed/kPCILinkSpeed_8_GTs) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)