Your PC will need a graphics card thats as powerful as a GeForce GTX 550 Ti/Radeon HD 7870 and it should be paired with either a Phenom II X4 945/Core i5-2300 2.8GHz CPU to match the Rock Band 4 recommended system specs. This PC setup will deliver 60 Frames Per Second on High graphics settings on 1080p monitor resolution. System memory required for Rock Band 4 is 8 GB performance memory. Taking a look at the min reqs you will require a Radeon HD 6850 graphics card with a Core i5-2500T 2.3GHz or Phenom II X3 B75 processor to reach the minimum Rock Band 4 specs, run on low graphics setting and 720p. You should also have 4 GB system memory for min specs. Another thing to consider is the DirectX capability of your GPU. Rock Band 4 needs a GPU capable of running DirectX 11. Recommended needs around a 8 year old PC to run.