So I currently have a MSI 970 Gaming Mobo, AMD FX-8350, Gigabyte GTX 970, 16Gb of Corsair Vengeance Ram and I am also having this problem.
At this point I was about to honestly buy your exact Mobo, CPU, and G.Skill Sniper gaming RAM because I thought this was only an issue with FX-8000 series CPU's. It seems that is incorrect. I then thought it was my GTX 970 card, so I put in 2 HD Raedon 6850's in crossfire and lowered all settings down and still had issues with microstutter. Which made me believe that it's probably my CPU. Your issue proves thats not the case. So which leads me to believe maybe the HD raedon cards I tried were not new enough to provide the best framerate. So I ordered a EVGA GTX 970 SC 2.0 and had the same issue...
So I thought maybe it was the OS, I was at Windows 10, fresh installed Windows 7 pro 64 bit, no dice, fresh installed Windows Ult 64 bit, no dice. So then maybe it is just the GTX 900 series cards?
A couple of people said they had no issues on their 700 series GTX cards.
If you remember back a couple weeks ago the shadow daggers CSGO update rolled out. And since around that time I've been having this issue.. & everyone seems to say oh steam/source games are poorly optimized. Well that's great but its not a solution. I honestly don't know what to do but I'm just trying to add to your thread of things i've tried and read.
Supposedly there are some iffy drivers with the GTX 970s so that may be something to look at but I've tried all available drivers and never seems to do the trick. I'm getting roughly 200~ fps all times with my current setup and sometimes drop into high 100's for a second.
Also, I tried reinstalling graphics drivers without Geforce experience and HD audio drivers and only the Physx stuff, no dice. I tried lowering all settings & playing with 1280x720 reso and still no dice.
Some people said to unlock cores on your CPU.
Actually that may be something you need to look at, right click your task bar go to task manager, click performance, click resource monitor & click CPU make sure none of your cores say pakred. If so you will need to unpark them. I didn't have any parked cores so that wasn't my issue.
One other thing people did with Intel i7 4790k's was to go into your BIOs and force gen3 for PCI-e bus & don't let it be set to auto. That fixed the stuttering for some people. See here:
https://forums.geforce.com/default/topic/814440/geforce-900-series/everyone-having-any-stuttering-with-a-900-series-card-come-here-and-let-us-work-together-/2/
Not really sure what to do..
Let me know if you find anything else.
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