Massive lag in every game

[Fesk]

First of all, I got this issue when I downloaded the 332.21 Nvidia drivers yesterday. Second, this happens in pretty much every game.

Okay, so I installed the latest Nvidia driver and restarted my pc. Then I tried playing some BF4 and instantly got extreme lag spikes, even though it has worked perfectly fine before. It plays for 2 seconds on 90+ fps and then it heads right down to ~10 fps for the next 2 seconds. I have checked my GPU utilisation and from the graph I can see extreme spikes. It goes no higher than 70% but goes all the way down to 0%.

I have tried rollbacking to 20 different drivers, I have tried reinstalling windows and all drivers. I have tried taking the GPU out, and cleaning the fans. I have also tried reinstalling BF4.

I'm really really pissed as I just spent over 2k dollars for a new computer and then it doesn't work. Help would be appreciated a lot!

SPECS:

Intel Core i5-4670 Processor
Socket-LGA1150, Quad Core, 3.4GHz, 6MB, 84W, HD460

Gainward GeForce GTX 780 3GB PhysX CUDA
"Phantom", with Assassin's Creed IV, Splinter Cell

Corsair RM650, 650W PSU
ATX 12V V2.4, 80 Plus Gold, Modular, 4x 6+2-pin PC

Crucial DDR3 BallistiX Tactical 16GB
16GB kit (8GBx2),1600MHz, 1.5V, CL8-8-8-24

MSI Z87-G45 Gaming, Socket-1150
ATX, Z87, DDR3, 3xPCIe-x16, SLI/CFX, VGA,HDMI,DP,K

Crucial M500 SSD 2.5" 120GB
SATA 6 Gb/s (SATA3.0), 500MB/130MB/s read/write, w

Seagate Barracuda® 1TB
SATA 6Gb/s (SATA 3.0), 64MB Cache, 7200RPM, 3.5"

Windows 8.1

http://i.imgur.com/bkMxYxf.png

 

[apcs13]

Well you should be good with those specs for just about any game maxed at 1080p, and if you have tried uninstalling the drivers and reinstalling Windows, I hate to say it, but I think a part is defective. If you still can I would try to RMA that 780 and ask for a new one. Try that, and if that doesn't work, then I would see about doing the same for your other parts starting with CPU then RAM etc... Also contact the manufacturer and see what the deal is.