Hardware forum is the "natural" place for this, as you may well know ... as well as the Tweaker's Page, THE knowledge-base forum on hardware used with the Adobe digital video apps. They have tests you can download to test your machine, and that would give you a definitive answer as to where your "choke" point exists at this time ...
Tweaker's Page ...
Hardware Forum ...
From the Tweaker's Page you can "join", then download their latest PBM ... something ... test. It's a zipped file with a short sequence with it's assets, LOADED with the nastiest arrangement of effects designed to test your complete system from CPU/GPU/RAM/disc-read/write as you export the sequence.
Included in that zipped folder is a logging program that records the time taken by your system to do everything ... Bill & the rest of the guys there can interpret that and give you the hard scoop. Not opinions ... hard data.
You're right. I was thinking because I use specifically premiere pro that our would be a better fit.
I'll give that a whirl.
A lot of the people "over there" are people you'll recognize from here also ... as that hardware forum is primarily for the video programs, including the Four Biggies ... PrPro, AfterEffects, Audition, & SpeedGrade. So everyone there is video-savvy or trying to become so. Have fun ... um ... ? ...
Maybe the forum mod will just move this over to the hardware forum.
But my quick answer is do not expect a new GPU to help appreciably with your export times (I assume that when you said render you were really talking about export times).
Can you walk into a Microcenter Store?
No micro centers around me.
They have some great bundle prices on i7-4790K CPU's and motherboards. This is a great CPU.if you can afford it. Runs non-overclocked at 4.0 GHz. Any good friends near a Microcenter?
Make sure you have an good power supply.
That is a great deal. Itd almost be worth the drive if you could buy more than 1. I've got one about 150miles from here.