Yes your 3500 will bottleneck the GTX650ti. If you have a hefty motherboard and a decent cooler, you should try to OC your APU to at least 2.8ghz. But if you don't, my best advice would be selling the 3500 and get an Athlon II x4 641/651k ( the athlon CPUs that use FM1 socket ) instead, then get a 7770/650ti. Doing that will help you get rid of possible bottleneck.
Additionally, GTX650ti is better for gaming than HD7770.