help a daft cunt work out if his computer will handle an upgrade to an i5

[Chromesthesia_]

i have 500w power supply

currently have
gtx 750 ti
pentium processor of some sort running 2.6ghz

Spoiler: full list of specs dragged from the website i bought it from

• Intel Pentium G3258 Processor

• Asus H81-M Plus Intel® H81 Express Motherboard

• Arctic Cooling Freezer7 Pro For Superior Cooling

• 8Gb Super Fast DDR3 Memory

• 2TB 7200rpm SATA3 64Mb HardDrive

• 2Gb nVidia GeForce GTX 750 Ti Graphics Card

• Stylish Defender Series ATX Gaming Case

• Powerful 500W PFC PSU

• High Speed 24x DVD Writer

• Wireless 150Mbps Network Interface Card

• Ultra Small USB2.0 Bluetooth USB Adapter

i want

https://www.amazon.co.uk/Intel-4690K-Processor-LGA1150-Socket/dp/B00KPRWB9G/ref=dp_ob_title_ce

that one

help