Question Upgrades

[ImSmurfy]

Right now I’m running a 4770k @ 4.2 ghz and a 1080ti with 1800 MHz ddr3 and 850evo ssd. I have noticed a slow but sure decline in performance over the last year and I’ve put it down to age of parts - specifically the cpu has been struggling. Because of this I am considering buying a 9900k and of course a new motherboard and ram - I have a noctua dh15 for cooling, does anyone have any suggestions for these parts or anything else to add?

 

[Lutfij]

You might want to list your current system's specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

We will also need a budget, your preferred site for purchase and your expected upgrade purchase.

 

[ImSmurfy]

You might want to list your current system's specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:

We will also need a budget, your preferred site for purchase and your expected upgrade purchase.

CPU: i7 4770k @ 4.2
Motherboard: Asrock z87 professional
Ram: 2x8gb Hyper X Fury 1867mhz
SSD/HDD: 1x Samsung 750 128gb (windows only), 1x Samsung 850 500gb, 2x 1TB Seagate
GPU: MSI 1080ti Lightning
PSU: EVGA 850 watt Platinum
Chassis: CM Haf X
OS: Windows 10 Pro

£500-750 Budget, Amazon Preferred.
Expect to upgrade CPU (9900k) Mobo (z390 Aorus Pro) and 16gb ddr4 (Unsure) and perhaps an NVME Drive for windows if I can squeeze it out.