1440p gaming upgrade - £700-800 budget

[joeflaherty]

Hi all. After years of happy gaming, my rig is now starting to show its age. I've upgraded it piecemeal over a few years, but I think it's getting to the point where I need to upgrade the GPU, monitor, CPU and MOBO. My current games run at a solid 60fps, but I'd like a QHD 144hz monitor and everything that would be needed to drive it!

The current set-up is as follows:

• i5-4670k 3.40GHz
• MSI Z87-G45
• Asus ROG Strix RX480 8GB
• 16GB DDR3 RAM (Kingston HyperX Beast) @ 2400 MHz
• Corsair 600W CX Series 80
  
• Samsung 500GB SSD, plus a 1TB HDD
• 24" Acer HD monitor
• Zalman Z3 plus ATX case

Ideally I'd like to keep the case, RAM, SSD and PSU, so I'm really looking for a solid CPU, GPU and MOBO. PSU can be upgraded if needed but hopefully 600W should be sufficient. Thanks in advance!