A new version of GPU-Z is available with support of new GPUs and bugfixes.
GPU-Z 0.7.5 complete changelog:
- Fixed crash/hang on NVIDIA Optimus - Fixed crash during CUDA detection - Added voltage monitoring support for new Bonaire/Pitcairn SKUs - Fixed BIOS reading on AMD Mars and Oland - Added support for AMD Radeon R7 260, HD 7600A, HD 8850M, HD 8400, HD 8240, HD 7620G - Added support for NVIDIA GeForce 705A, GTX 645, GTX 650 OEM, Grid K260Q, Quadro K5100M, K6000 - Added support for Intel GMA (Bay Trail), HD 4200 - Windows 8.1 will now be detected properly - Sensor data in shared memory will now update once per second, as intended
You can download GPU-Z 0.7.5 from this page.
http://www.techpowerup.com/downloads/2329/techpowerup-gpu-z-v0-7-6/
GPU-Z 0.7.6 with GTX 750 (GM107), GTX 750 Ti (GM107), GeForce 840M (GM108) support.