Software Poor Benchmarks GTX970 & i5-4690k

About four weeks ago I built a new rig and everything was going great. Starting two days ago I noticed I was getting terrible FPS, even in very lightweight games. I decided to download and run some benchmarks, and something is clearly wrong. My system, even with stock clocks, should be getting in the ballpark of 10k in 3Dmark Firestrike; I am getting around 4k with an abysmal physics score.

I rolled the drivers back, completely reinstalled the graphics card, checked the BIOS settings, checked Nvidia control panel, checked the CPU with CPU-Z (all to the best of my amateur knowledge), and nothing seems to stand out as the culprit. Poor performance started around the time of a windows and driver update but I can't say for sure if that is the problem or merely a coincidence. I am at a loss as to what I should do, or even be looking for. Any help would be greatly appreciated.

CPU: i5-4690k 3.50GHz (stock clock and cooler for now)
GPU: Asus Strix GTX970 (factory clock)
RAM: 8GB HyperX Savage 1600
PSU: EVGA 600B
MB: MSI Z97-G45
OS: Windows 7 Home Premium 64-bit

Below is the average benchmark.
http://I.imgur.com/hPjNJQw.png?1