Hi guys, In the coming months is my 18th and I also start my apprenticeship in October, which means I'll finally be earning a steady income. I know I'm definitely going to upgrade by the end of the year but I have a few questions first, but first let me show you my current rig. CPU: AMD Phenom ii X6 1045T @ 2.7 GHz MOBO: Asus M5A78L microATX GPU: AMD Radeon HD 6870 PSU: Colors-IT 550W RAM: Corsair Vengeance 2*4GB @ 1600MHz Right, so the issues I'm facing here is whether I should do it all in one go and save up or do it gradually, and if I do either I just want a second opinion on compatibility. So, I was planning on either upgrading to: CPU: Intel i5-4670K 3.4GHz MOBO: Gigabyte Z87-HD3 GPU: Nvidia GTX GeForce 780 PSU: Corsair CX750W So I could either by the CPU, MOBO and PSU together and transfer my old stuff for a few months, or I could get the GPU and use that with my existing rig for a few months. My questions are: Would the GTX 780 work with my current motherboard & power supply? What offers the biggest jump in gaming performance? Thanks guys, it's would be a great help! The upgrade should cost me about £630 in total, I'm not sure how much I'll get for my 18th, and if I do whether I want to burn through it all right away so I'd rather do it in £300 or so chunks which conveniently it splits up into (£300 for CPU, PSU & MOBO and then £330 for GPU).