You are downloading the GFXBench APPX file v126.96.36.199 for Windows Phone. GFXBench is a free and useful Utilities & Tools app: GFXBench is a free, cross-platform and cross-API 3D graphics benchmark that measures graphics performance, long-term performance stability, render ... You can now download the offline APPX file to install & try it.
Download Locations for GFXBench 188.8.131.52 APPX file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline APPX File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline GFXBench APPX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.