If I upgrade to an i5/i7, can I keep the stock heat sink and fan? Or is an upgrade necessary? I am totally ignorant of CPU cooling and I wonder that a quad-core CPU might have different cooling system compared to a dual-core one. I do not intend to overclock, but I have to include a new cooling system in the plan if it is necessary and practical.
I have searched on some discussion boards that this board can actually support an LGA 1156 Xeon, as its chipset requirement is the same as with the i3/i5/i7 ones. Assuming that indeed a Xeon processor works, and considering the performance and the price difference in the second-hand market, which in your opinion could be the best option?
For the GPU, I guess you're right. I probably wouldn't put the GPU as top priority for now, considering the other parts. But when I do, can you suggest to me a GPU that could still run on Legacy BIOS motherboard? I have read somewhere that new AMD GPUs don't work with Legacy BIOS anymore.