Upgrading pc parts. Help me chose which ones please

[Daiterian]

Hey guys. I'm new around here and I'd love some suggestions to upgrade my pc I'm looking to spend around $400 dollars.

My PC:

-Intel i5 2500k 3,3ghz
-Gigabyte GA-Z68MA-D2H-B3
-ZOTAC GTX 560 Ti
-8gb ram (not sure model though)
-500GB Seagate hdd
-Thermaltake TR2-600w
-Thermaltake V4 black edition

Bear in mind that all these components are 3,5 years old.
Thanks in advance!

 

[geofelt]

Your I5-2500K is still a very competent gaming cpu.
If you have not overclocked it, you can extend the life by buying a modest cpu cooler and doing a conservative overclock.
CM hyper212 and cryorig are popular, but I suggest looking for a scythe Kotetsu all are about $35.
http://www.anandtech.com/show/10543/the-skylake-core-i3-51w-cpu-review-i3-6320-6300-6100-tested

For games, your GTX560ti is the weak link.
Look to a GTX1060 about $200.

One of the most satisfying performance upgrades you can make is to convert to a ssd for windows.
Buy a Samsung EVO 500gb ssd for about $130.
Use the free Samsung ssd migration aid to move your "C" drive to the new ssd.
Repurpose your hard drive for bulk storage and backups.

 

[Daiterian]

Your I5-2500K is still a very competent gaming cpu.
If you have not overclocked it, you can extend the life by buying a modest cpu cooler and doing a conservative overclock.
CM hyper212 and cryorig are popular, but I suggest looking for a scythe Kotetsu all are about $35.
http://www.anandtech.com/show/10543/the-skylake-core-i3-51w-cpu-review-i3-6320-6300-6100-tested

For games, your GTX560ti is the weak link.
Look to a GTX1060 about $200.

One of the most satisfying performance upgrades you can make is to convert to a ssd for windows.
Buy a Samsung EVO 500gb ssd for about $130.
Use the free Samsung ssd migration aid to move your "C" drive to the new ssd.
Repurpose your hard drive for bulk storage and backups.

Lots of people recommended me the SSD, might give it a try. I'll try overclocking the CPU I guess and buying a new GPU as well. Thanks!