which of the followinng cards would be the best:-
1. Forsa gtx 550 ti 3gb ddr3
http://www.flipkart.com/forsa-nvidia-geforce-gtx-550-ti-3-gb-ddr3-graphics-card/p/itmdfzvva7hkekg3?pid=GRCD8KFQYWGXKVW4&ref=c560b923-fbb0-496a-80f4-d7869ee2c70d&srno=t_6&otracker=from-search&query=gtx%20550ti
2. Power color hd 6790 1 gb ddr3
http://www.flipkart.com/powercolor-amd-ati-radeon-hd6790-1-gb-gddr5-graphics-card/p/itmd5yne82zudzg6?pid=GRCD5YNDRAMTKGZH&ref=0a35de99-bbd2-4395-b917-dc8c4c29556e&srno=t_2&otracker=from-search&query=hd%206790
3. Asus hd 7750 1gb ddr5
http://www.flipkart.com/asus-amd-ati-hd-7750-1-gb-gddr5-graphics-card/p/itmd7hzcp7hsqpzj?pid=GRCD7HZCMSNWZJHB&ref=7cdfa312-9e11-42f3-8c36-48f12cc4e6a0&srno=t_2&otracker=from-search&query=hd%207750
4. Forsa gts 450 4gb sddr3
http://www.flipkart.com/forsa-nvidia-geforce-gts-450-4-gb-sddr3-graphics-card/p/itmd8gnvkwgvvgan?pid=GRCDCAZEPJFWJQ6H&ref=02be53cb-e9f3-42f3-a5fe-c5b2b3e44b8b&srno=t_1&otracker=from-search&query=gts%20450
keep in mind their prices also
1. Forsa gtx 550 ti 3gb ddr3
http://www.flipkart.com/forsa-nvidia-geforce-gtx-550-ti-3-gb-ddr3-graphics-card/p/itmdfzvva7hkekg3?pid=GRCD8KFQYWGXKVW4&ref=c560b923-fbb0-496a-80f4-d7869ee2c70d&srno=t_6&otracker=from-search&query=gtx%20550ti
2. Power color hd 6790 1 gb ddr3
http://www.flipkart.com/powercolor-amd-ati-radeon-hd6790-1-gb-gddr5-graphics-card/p/itmd5yne82zudzg6?pid=GRCD5YNDRAMTKGZH&ref=0a35de99-bbd2-4395-b917-dc8c4c29556e&srno=t_2&otracker=from-search&query=hd%206790
3. Asus hd 7750 1gb ddr5
http://www.flipkart.com/asus-amd-ati-hd-7750-1-gb-gddr5-graphics-card/p/itmd7hzcp7hsqpzj?pid=GRCD7HZCMSNWZJHB&ref=7cdfa312-9e11-42f3-8c36-48f12cc4e6a0&srno=t_2&otracker=from-search&query=hd%207750
4. Forsa gts 450 4gb sddr3
http://www.flipkart.com/forsa-nvidia-geforce-gts-450-4-gb-sddr3-graphics-card/p/itmd8gnvkwgvvgan?pid=GRCDCAZEPJFWJQ6H&ref=02be53cb-e9f3-42f3-a5fe-c5b2b3e44b8b&srno=t_1&otracker=from-search&query=gts%20450
keep in mind their prices also