Originally Posted by tpi2007
Bold for emphasis. That shouldn't be happening, a 3570K should be able to play YouTube videos just fine, at the very least at 1080p. Your GTX 1060 should be offloading the decoding of the videos anyway. Try updating your GPU drivers to the latest version (do a clean install), along with the suggestions presented by the others members above.
A 4C/4T CPU will be a limiting factor in gaming at this time though. If you could find an extra cheap 3770K, that would be a worthy consideration, but I'd only do it if I could find some extra cheap 1866 / 2133 Mhz DDR3 RAM to go with it, which brings me to your second problem: while you do have a good amount of RAM, it's a bit slow, at 1333 Mhz. Your CPU's IMC is rated for 1600 Mhz and it can easily do 1866 Mhz or more. However, all things considered, I wouldn't recommend upgrading that or the CPU at this point in time. That low RAM speed will be a factor in your framerates though, especially minimum fps. As I said though, it's hard to make such a recommendation at this point, unless you get a really good deal for both CPU and RAM.
I'd advise you to wait until Zen 2 is released early next month. Even a $199 6C/12T Ryzen 5 3600 paired with a budget B450 motherboard and some 16 GB 3200 Mhz DDR4 RAM will be a massive upgrade from your current system.
As soon as I saw simple things like youtube videos messing up I knew something was wrong. I did hear that when Zen 2 comes out the price of processors should drop so I'll probably wait till then to purchase a current gen processor.