Intel makes LGA2011 i7s with up to 40 PCIe lanes. See, for instance, the Core i7 5930. The 5820 has 28 lanes. They're marketed as "high end desktop" chips, and

Intel makes LGA2011 i7s with up to 40 PCIe lanes. See, for instance, the Core i7 5930. The 5820 has 28 lanes. They're marketed as "high end desktop" chips, and they're socket-compatible with the Xeon.