I currently have a gigabyte GTX 650 TI in my system. I have used both MSI Afterburner and the Gigabyte OC Guru to increase my memory and clockspeed. i used www.guru3d.com/articles_pages/gigabyte_geforce_gtx_650_... as a guide in terms of the max OC i should try. While running unigene engine to stress test my GPU my clock speed was down to 549MHz and my memory speed down to 810MHz. possible driver issue?
The readings Unigine give are never accurate, so make sure you are using the Afterburner OSD. If it actually is clocking that low, its a driver issue and pretty common. Restarting your PC should fix it, if that doesn't work reinstall the drivers.