Choppy game play

[mogge]

I encountered an issue with a USB sound card that resulted in me replacing it with the on-board audio card that uses realtek drivers. Before doing so I was getting 350+ fps in game for CSGO, but after doing the swap i'm getting roughly 150~ and the game feels really choppy. I noticed while playing the game for roughly 1hr+ my GTX 980 never reached above 58 degrees and the fans never went active (max GPU utilization according to hwmontior was 59% - video engine stayed at 0%). I thought maybe it was the realtek device causing the reduction in FPS, but i disabled it via device manager, rebooted but i still had the same FPS. So my question is would my CPU temperature sitting around 75-80 degrees (reached 89 degrees max while gaming) cause this reduction in FPS? The issue i encountered with my usb sound card led me to believe it was my motherboard so i RMA'd it and upon doing so I broke my bracket for my H90 cpu cooler so currently i'm using the stock cpu cooler. Also i'll be browsing in chrome and i hear the CPU fan shoot up to 1500RPM randomly. currently my cpu is idling around 67-71 degrees (jumping around constantly in that range)

Here is the build:

Intel Core i7-4790K @ stock
Stock cpu cooler (was using Corsair H90)
Asus MAXIMUS VII GENE Micro ATX
G.Skill Ripjaws X Series 16GB 2x8
Crucial M4 128GB SSD
Samsung 840 EVO 500GB SSD
Western Digital 1TB HDD
EVGA GeForce GTX 980 4GB Superclocked ACX 2.0
Aerocool DS Cube
Corsair 760W PSU
Windows 8.1 x64

 

[mogge]

I've disabled the onboard sound via bios thinking it may be that, but no luck.