According to the release notes, the new GPU-Z adds support for Nvidia's GeForce GTX 980 Ti, GTX 965M, GTX 950M, NVS315, and GT 750 (GK106) as well as AMD's upcoming Fiji GPU, Mullins APU integrated graphics and Intel's Core "Broadwell" CPU integrated graphics cores.
The new GPU-Z also adds a new feature which checks if the BIOS on the graphics card comes with a UEFI module and also fixes some issues including GTX200B die size, NV42 specifications, missing Nvidia PerfCap sensor. It also has improved OpenCL detection code.
The new GPU-Z 0.8.3 is available with and without ASUS ROG skin and can be found over at Techpowerup.com.