I have a 9590 but I want to upgrade

Solution
Ah, that makes more sense.

If you want to reuse the 212Evo (I wouldn't, as it's not a particularly good performer), you'll probably need to source an AM4 bracket from CM.

Otherwise, other than CPU/MB/RAM, everything else there should be reusable.

Remember to link your OS install to a MS account, so you can hopefully transfer it to a new build.
No guarantees though, you may also need a new license.
https://support.microsoft.com/en-ca/help/20530/windows-10-reactivating-after-hardware-change
The current equivalent of a 9590? Luckily, there isn't one.

In a spec, on paper sense, the 9590 is an 8 "core" (debatable), 8 thread chip.
Loosely, a Ryzen5 1400 would be somewhere in the same ballpark - with great improvements in IPC and power draw.

A Ryzen5 1600 or 2600 would be what I'd look to for a modern gaming system with a 1070TI (if you're sticking with AMD). 6c/12t.
Remember, you'll need a new AM4 motherboard & DDR4 (high speed, 3000MHz+) for compatibility with a new chip.

Looking at your current build (shows a 6300, not a 9590?), you're pretty much looking at a new build.
The CX430 isn't great, the MB/RAM won't be reusable.... you can only really keep the HDD and Case.
 
Ah, that makes more sense.

If you want to reuse the 212Evo (I wouldn't, as it's not a particularly good performer), you'll probably need to source an AM4 bracket from CM.

Otherwise, other than CPU/MB/RAM, everything else there should be reusable.

Remember to link your OS install to a MS account, so you can hopefully transfer it to a new build.
No guarantees though, you may also need a new license.
https://support.microsoft.com/en-ca/help/20530/windows-10-reactivating-after-hardware-change
 
Solution
Not sure whether you intend to buy a component one at a time, but I'd highly recommend you save the money first - then purchase CPU/MB/RAM in one go.

You cannot use any of the 3 new components without the other 2, so have no way to test.
Much faster returning via the retailer if you have an issue, opposed to sitting for a couple of months & finding out there's an issue. While RMA's with the manufacturer are typically easy enough, they are more time consuming that a return/replacement via a retailer within X number of days.