My GPU usage drops to 0.0 while gaming

bry0323

Honorable
Feb 1, 2014
1
0
10,510
I recently built a new computer. For about a day while using it, it was completely fine. It ran games well without any spikes or problems. However, today, when I started trying to play team fortress 2, my GPU usage dropped to 0.0 frequently, causing nasty lag spikes and making the game unplayable. Can someone help me fix this?
My Specs:
CPU AMD FX-6300 3.5GHz 6-Core Processor
CPU Cooler Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Motherboard Gigabyte GA-990FXA-UD3 ATX AM3+ Motherboard
Memory Kingston HyperX Blu Red Series 8GB 240-Pin DDR3 SDRAM DDR3 1600 Desktop Memory Model KHX16C10B1R/8
Storage Samsung 840 EVO 120GB 2.5" Solid State Disk
Storage Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
Video Card Asus Radeon R9 270 2GB Video Card
Case Cooler Master Elite 430 ATX Mid Tower Case
Power Supply Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply
Thanks in advance.