GTX 770 SLI Frame rate stutters/drops

[Faphyy]

I have just recently bought another Gigabyte GeForce GTX 770 OC Edition 2GB card and have ran both my cards in SLI. I have tested a lot of games, and have seen that these cards achieve great frame rates but stutter a lot, these stutters make frame rates go from 120fps right down to 10-20 fps. The stutters/drops are most prominent in Battlefield 4, Crysis 3 and Assassins Creed 4, they are really annoying and are effecting game play majorly!

System specs:
-AMD FX 8350 @4.00ghz
-16GB Corsair Vengeance DDR3 ram
-ASRock 970 Extreme4 Motherboard
-SilverStone Strider Gold 1000w PSU
-Segate Barracuda 2tb 7200rpm
-Corsair Hydro Series H60 CPU cooler
-2x Gigabyte GeForce GTX 770 OC Edition 2GB

Desperate for a fix of some sort.
BF4 min/avg/max:
Min: 8
Avg: 98
Max: 142

 

[Kekoh]

Have you tried updating to the 337.50 beta drivers? Here is the 64-bit version: http://www.geforce.com/drivers/results/74636

 

[Faphyy]

I am currently using that driver, still the same result. I have tired all different drivers but nothing fixes the problem unfortunately.

 

[Kekoh]

Do you have Windows 7? Have you tried unparking your cores?

 

[Faphyy]

Currently running Windows 8.1, unparked all cores aswell. I have tried on windows 7 but the stutters still occur, sometimes even worse.

 

[Kekoh]

Do you have a secondary monitor (or temporarily borrow one)? If so you could try monitoring GPU usage, CPU usage, and check if there are any processes going nuts when you get the fps drop.