How do I replace my motherboard to upgrade to i7 7700k on my Acer G3-605

Hi I have a acer g3-605 prebuild pc. I have used it for 3 years now and on the backside of the pc it says recommend to not open. But I still did because I need to.
I'm familiar with software but not with hardware so I really need help with this.
I want to replace my i5-4460 with a i7 7700k. I think they do not have the same socket so I cant just place it in there. So I googled around a bit and I think I need to replace my motherboard for my i7 700k to fit.

But I don't know if the motherboard will fit in the case since it's prebuild and pretty hard to access inside the pc. Or if I need to buy a new case. Could someone please explain to me how to do this.
Thank you in advance.

PC Specs
Manufacturer: Acer
OS: Windows 10
Motherboard: Predator G3-605
CPU: Intel Core i5-4460 @ 3.20 GHz
Memory: 12 gb
Hard Drive: wdc wd10ezex-21m2na0
Video Card: Nvidia GTX 770
Sound Card: Nvidia High Definition Audio
Headphones: Logitech G933
Monitor: BenQ XL2411Z 144Hz 24 inch
Mouse: Corsair Sabre
Mousepad: Steelseries Qck Heavy
Keyboard: Razer DeathStalker