I built my computer about 10 years ago with the thought of being able to upgrade it rather than buy a new one every 3 or 4 years. I think I definitely got my money's worth out of it and over the years have upgraded the memory, added an SSD, and even upgraded the video card recently. I have had no issues other than having to replace one of the fans once and it was fun to build. I don't do any gaming and so it has always been fine for normal office type of stuff, web browsing, etc, but photo and video editing lags a little, and seems to do it more over time especially whenever I update the editing software. Since everything else is up to date, I assume the CPU may be the bottleneck here. It is an i5-2500k @ 3.30GHz from about 10 years ago. My motherboard is an ASUS P8P67 PRO. Is this as simple as just getting a new CPU, or will the motherboard need to be replaced as well?