A new update of GPU-Z is ready. This new version brings the support of upcoming dual-GPU AMD Radeon HD 7990. Other new GPUs are also supported (HD 8550M, HD 7340, HD 7290, HD 8670D, GeForce GT 740M, 680MX, 675MX, GT218 based 9400 GT).
You can download GPU-Z 0.7.0 from this page.
http://www.techpowerup.com/downloads/2252/techpowerup-gpu-z-v0-7-2/