So atm i have a 3770k and i am wondering if the upgrade is worth it?
for the cost, nay. not really.
I would not even recommend an upgrade for i7-2600k, so no
Look up benchmark comparisons. Surprising how older Intel CPUs still hold up.
depending allot on what you are doing with your system.
If its mainaly for gaming, then it might not be worth it.
But if you do video rendering for example then it might be worth it.
Nay. The 3770K was a great part, and it still is. It's what I use. Probably won't see any performance gains. But if you are rendering, maybe.
If you want to upgrade just for cpu and gaming performance, I say no. However, the Z170 chipset does have usb 3.1, 20 PCI-E lanes versus the 16 lanes on the Z77 boards and supports DDR4 memory. So, it depends on what you do with your rig and if you can utilize the added features of the Z170 chipset.