Delay through the GTHE3 transceiver consists of a variable component (barrel shift or TX and RX gearbox latency) and a fixed component. The fixed component is made up of the delay shown in the following table.
| Block | Latency (UI) | |
|---|---|---|
| TX | 16-bit datapath cores (8b/10b) | 95 UI |
| 32-bit datapath cores (8b/10b) | 175 UI | |
| 64-bit datapath cores (64b/66b) | 144.5 UI | |
| RX | 16-bit datapath cores (8b/10b) | 134.5 UI |
| 32-bit datapath cores (8b/10b) | 248.5 UI | |
| 64-bit datapath cores (64b/66b) | 157.5 UI | |