Massive stuttering in the most recent frostbite engine games (DA:I/BFH)

EDIT: just realized i posted it in the wrong location.... sry about that

Hi!

I recently bought Battlefield Hardline and Dragon Age Inquisition and I'm getting massive stuttering in both games. While not stuttering the fps are amazing... but then it drops from 60(using vsync) to 15. This happens after spending about 10 minutes in-game in DA:I and about 1-2 hours in BFH (after some tweaking in the nvidia control panel) and when it starts it keeps doing it more frequently and it lasts for 2-5 seconds. Only occurring in the above mentioned games which use frostbite as an engine...

After using afterburner I checked that when there was stuttering the gpu usage would lower a lot... it would go down to about 20%.

Not sure about cpu spikes, but it is possible as well. its just hard to keep track of the usage of 8 cores XD

Running the games at 1080p.

Here's what I have done so far:

Installed latest drivers before and after running the game as suggested by some community members

Down clocked my gpu

used user.cfg file {gametime.maxvariablefps 59.64}

uninstalled nvidia hd audio driver

ran origin and games as admin

flashed my mobo bios

Tweaked in-game graphic settings

Disabled origin in-game under app settings

Disabled origin in game in each game separately

Checked for overheats (no overheats)

Nvidia Control panel:

   Power management mode: Prefer maximum performance

   Triple Buffering: On

   Multi-Display/mixed-GPU acceleration: single display performance mode

By the end of all that the issue was still very present...

My rig:

Windows 8.1

FX 8350 4.0 GHz (no OC)

Gigabyte 3x GTX 970 (no OC)

8 GB RAM 1600 MHz

Installed on HDD

Any help is appreciated. Thank you in advance!

EDIT: Tried the 350.05 nvidia driver. It helps a bit performance wise but it doesn't fix the issue.

           Tried the suggested nvidia cpanel config + user.cfg settings suggested by the community and it doesn't eliminate the problem.