Hey. I have a question. I have an old CPU AMD Phenom XII 545 3.00GHz (dual-core). I wanna completly upgrade my PC. So i need to buy new MB, CPU and GPU. I want to buy some i5 or i7 intel CPU and some better GPU, like GTX 970, or something (or should i go to R9 290?). I can't buy it all at once, so my point is. If i buy a GPU first, will it be work ok with my old CPU (it will be replace with new one some month after)? Or should I first buy a new MB with CPU a use there my old GPU HD 4650, and then in some time replece it? Thank you.