I would sort of agree. Get a G50TiB 2GB model. I have the ASUS GTX 650TIB with the DCII Cooler and it crushes all games on High-Ultra with 40+ FPS. My CPU is the i5-3570K with 4GB RAM. On 1080p , I never crossed 1.5GB so I would say 1GB would sorta go , but will surely struggle. Get something like a GTX 650TI Boost 2GB Edition.
Also @CTurbo , who is offering 7850s for 109$ and 650TiB for 99$. I am considering both to be 2GB models....