Intel SSD P3520 1.2TB

Hi,

Would an Intel SSD P3520 1.2TB drive - PCi-e 3.0 (4x) fit a 2U case and is it compatible with an intel 2600CW2S motherboard? I see the motherboard only has PCIe Gen III x8, and PCIe Gen III x16 slots.

In other words are PCIe Gen III x8 and PCIe Gen III x16 compatible (both technically and physically) with the lower speed PCIe Gen III x4 drive?

Also do I understand correctly that the form factor of the hard drive (HHHL (CEM2.0)) means it would be able to fit a 2U server?

Thanks in advance.

Regards