The GT 740 would be more ideal to pair with the C2D E7200, but for only $10-$20 more I wouldn't blame you if you went with the GTX 750 Ti as you would still see a decent performance increase over the GT 740.
The GT 740 would be more ideal to pair with the C2D E7200, but for only $10-$20 more I wouldn't blame you if you went with the GTX 750 Ti as you would still see a decent performance increase over the GT 740.