Don't bump, please be patient in the future.
Here is the recommended specs from Steam.
OS: Windows 7/ 8 (64bit)
Processor: Intel Core i5-2300 or AMD Phenom II X4 940 or better
Memory: 4 GB RAM
Graphics: NVIDIA GeForce GTX 560 or AMD Radeon HD 7750 with 1 GB VRAM or better
DirectX®: 11
Hard Drive: 25 GB free space (SSD/Hybrid HDD/SSHD storage)
Sound: DirectX®-compatible
Your CPU and GPU appear to be under the recommended specs. Furthermore are you sure you want to download the 25GB game on your remaining 28GB..?
I'm not the expert at buying GPU and CPUs so I'll leave that to someone else.