Hi all, need some advise here. I am using i5-4670 right now together with GTX1070 which the CPU kinda bottleneck the GPU in most of the games i played.
I found a few used i7 4th gen processors in the market. Would like to know which is the best of value out of all of them:

i7-4770 - RM600
i7-4790 - RM650
i7-4770K - RM700
i7-4790K - RM800

*My budget is tight, so will stick with LGA1150 instead of upgrading the whole system.

Thank you in advance!

1. how can you tell the CPU is the bottleneck?
2. which games do you play? Which games can actually take advantage of the extra threads which is double from your i5? Clock speed improvements will be minimal IMO

When I googled, the gaming benchmarks between the 4th gen i5 and i7 is maybe in the single digit frame rate improvement. Even the 8th gen i7 is not a huge deal faster, the GPU makes a bigger difference.

Choose your games you play, look online for the benchmarks and decide which one makes the most sense. So many comparisons on youtube...

Old benchmark shows little difference. New games is totally different now. How I know? I used i5 4440 and GTX1070 almost same like him too (my previous card was GTX1070, claimed warranty and they gave me 1070ti as replacement). Severe CPU bottleneck, even when running at higher resolution than him; Me 2560x1440 vs him 1920x1080. Lower resolution = more severe CPU bottleneck.

Best value of the 4 CPUs, I would think either 4790, 4770k or 4790k depending on how much you willing to fork out. If it was me I would pick the 4770k, no need to update BIOS to support new CPU, and you already have a nice cooler and Z87 board for some minor overclock.

For 4770k you can aim for 4.1 or 4.2Ghz, 4790k 4.4 or 4.5Ghz.

OK I'm just looking at actual numbers from reviews. This one is from November 2017. My point is that 4th gen i5 to 4th gen i7 will make a difference but you likely won't notice it ie. you're spending RM600-800 and you'll still be unhappy. If you want to get the 10-20% difference you'll need to go up to the 8th gen.

https://www.techspot.com/review/1526-intel-...-i7-vs-8th-gen/

I forgot to mention that if your i5 4670 can handle the game at 70-80fps and you only have 60Hz monitor, no need to bother upgrading your CPU. I upgraded mine because I'm chasing the fps since my monitor can display 165fps.

1. I used Afterburner to monitor the CPU and GPU usage, which most of the time i noticed CPU hit 100% whereas GPU only 80~%, thats known as CPU bottlenecking isnt it?
2. Games i played are GTA V, Rise of the tomb raider, assassin's creed etc on High setting.
But anyway good point you have here, most of the games doesnt benefit much from the extra threads, the difference is so minimal which surprise me. My bad that i didnt do much research on that.

Seems like i will have to save up abit for 8th Gen CPU, thanks for the advise tho!

Yea i do know that my monitor is only 60Hz, but the game i played (At High setting), always dip down to 40+fps
As what tishaban says, i think the diff between 4th gen i5 and i7 isnt that much of a diff, so i guess will stay with 4670 until i have enough budget to upgrade my whole system.

Thanks for all the feedback, really appreciate them!

just get the 4770k and oc it 4.6 ghz and play 1440p is as fast as 8700k when using 1080ti at ultra setting u can get more than 100 fps.

U need over 4 GHz comfortably play on latest games with Pascal. Oc your cpu then