GTX 750 TI botleneck

[Fabio_3]

Hello! I want to upgrade my GPU, from a gt 620 to a GT 750 ti. Here are my system specs:
AMD Fusion™ APU A6-5400K Dual Core
8gb RAM DDR3
NVIDIA® GeForce™ 620
300w PSU 100-240v
Do you guys think I need to upgrade anything else? Will it bottleneck because of my cpu?

 

[Karadjgne]

As long as the 750ti is the type that needs no external 6pin power, you'll be fine, no bottleneck