Stratix III FPGAs support SGMII GigE operation on LVDS I/O pins at 1.25 Gbps. With Stratix III FPGAs, you can build communications systems requiring single or multiple (up to 96) Ethernet links quickly and simply while meeting jitter and tolerance requirements. SGMII GigE operation is:

Available on fast, mid-range, and industrial speed grade devices
Meets jitter and tolerance requirements with LVDS pins