-->Zotac NVIDIA GeForce GTX 650 Ti 1GB GDDR5, Core Clock: 941 MHz, Memory Clock: 5400 MHz, Memory Interface: 128-bit, Bus: PCI-Express 3.0 x16, CUDA Cores: 768, RAMDAC: 400 MHz, Max Resolution: 2560 x 1600, Connectors: 2x DVI, Mini HDMI ---- R$ 410,00
--> Zotac NVIDIA GeForce GTX 650 Ti 2GB GDDR5, Core Clock: 941 MHz, Memory Clock: 5400 MHz, Memory Interface: 128-bit, Bus: PCI-Express 3.0 x16, CUDA Cores: 768, RAMDAC: 400 MHz, Max Resolution: 2560 x 1600, Connectors: 2x DVI, 2x HDMI ---- R$ 429,00
--> Gigabyte Radeon HD7770 1GB DDR5, Engine Clock: 1100 MHz, Memory Clock: 4500 MHz, Memory Interface: 128-bit, Bus: PCI-Express 2.1 x16, RAMDAC: 400 MHz, Max. Resolution: 2560 x 1600, Connectors: DVI, HDMI, 2x Mini DisplayPort ---- R$ 389,00
-> XFX Radeon HD 7790 1GB 128-bit DDR5 Video Card, Core Clock: 1075MHz, DirectX 11, 1 x HDMI, 1 x DisplayPort, 2 x DVI ---- R$ 429,00
A minha dúvida é, qual dessas é a melhor, sem levar em conta o valor, somente a potência, qual dessas é melhor ?