What to upgrade?

[Offical]

Hello everybody, i got a pretty old pc, maybe 2 or 3 years old. And now i want to upgrade it, because on the games i play, like, mostly Rust, Cs go, League of legends, and the new realises.
Rust fps is like 50 60, with drops, cs go 170, league of legends 150. I know its good to have above 60 fps, but i cant run the new games, and i barrely can run Rust with 50 fps.

What should i upgrade to get good fps in new games, and rust?

My pc build now is:
i5 6400 2.40 ghz.
8 gb ram,
Nvidia geforce gtx 960, its not Msi, or asus. Just Nvidia geforce gtx 960.
and all other stuff is in this picture: http://prntscr.com/gabcmq

 

[Supahos]

Update bios, slap a 7700 in there and enjoy (consider adding another 8gb ram as well)

 

[Offical]

Update bios, slap a 7700 in there and enjoy (consider adding another 8gb ram as well)

I cant update bios, since that bios i have is the newest one.. https://www.asus.com/dk/Tower-PCs/G11CB/HelpDesk_Download/

if u could find some bios updates, that would be cool.. now the newest i can find is in 2016

 

[JackM3]

Processor looks a bit slow. Typically PC's these days have a CPU over 3GHz. My guess is that the CPU is holding you back

 

[Supahos]

In that case just make it a 6700 and enjoy

 

[tsnor]

Double check your specs.

i5-6400 is 2.7 base, but under load it goes to 3.3 ghz. It is not a 2.40 ghz part. http://ark.intel.com/products/88185/Intel-Core-i5-6400-Processor-6M-Cache-up-to-3_30-GHz

Couple of things you can do to see what part gives you the best performance bump.

1. UNDERclock the i5-6400 by 10% and see if your frame rates drop. If framerates stay about the same you are video limited. If frame rates go down then you need a faster CPU. You underclock your CPU in windows power mangement by setting max CPU from 100% to 90%, or you can change the multipler in the BIOS.

2. OVERclock the 960 and see if frame rates go up. Plenty of tools do this. MSI Afterburner is a good choice. If you get a stable OC with no artifacts at good temps then keep it. If your frame rates go up with faster video then you are video limited, get a faster card.

3. REDUCE VIDEO quality settings (AA, etc) and see if frame rates surge. If so you are likely video limited. Avoid reducing screen resolution which also effects CPU workload -- focus on turning down video quality.

4. Goto YOUTUBE. Look at systems running the i5-6400 with various video cards and see if strong cards than the 960 give better frame rates. (I use an i5-4690K @4.2 with a gtx 960. The 960 is a good card, but it cannot match current gen GPUs. My CPU is about 20% faster than yours).

Update: to give perspective....

You have a TOP TIER CPU: http://www.tomshardware.com/reviews/cpu-hierarchy,4312.html
You are 5 Tiers from the top for VIDEO: http://www.tomshardware.com/reviews/gpu-hierarchy,4388.html

Not sure why everyone is focused on a CPU upgrade. It might be the right answer, but normal "gaming balance" would have that same i5 with some very strong video cards.