Not only will that run very well, but it will be at somewhere close to the peak of the efficiency curve on that power supply. Most power supplies are highest in efficiency between 70 and 90% load, you'll be using over half of the 430W when compiling and encoding video. I run a 380W Earthwatts 80+ model with a 95W AMD Athlon X2 7750 (based on Phenom core with 2 cores disabled) with a power-hungry Radeon HD 4830, and it's been running strong for 4 months now without issue.