It happened since I installed the new graphics card in my computer. When I play games like World of Tanks or Skyrim, the screen freeze then stutters a little, and I'm forced to ctrl+alt+delete my way out of the game. I've tested my graphics card in benchmarks like "the flying doughnut" or fire strike. Nothing. My graphics card run them like a charm. I've reinstalled my drivers which where already up to date, it did not help. Here is my build.
PCPartPicker part list: http://pcpartpicker.com/p/R9qtZL
CPU: Intel Core i5-4570S 2.9GHz Quad-Core Processor
Motherboard: Asus H87-PRO ATX LGA1150 Motherboard
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1333 Memory
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Gigabyte Radeon R7 260X 2GB WINDFORCE Video Card
Case: Thermaltake Element G ATX Mid Tower Case
Power Supply: Thermaltake TR2 430W ATX Power Supply
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer
Operating System: Microsoft Windows 10 Pro OEM (64-bit)
Wireless Network Adapter: Cisco AE2500 802.11n USB 2.0 Wi-Fi Adapter
Monitor: HP 23xi 60Hz 23.0" Monitor
PCPartPicker part list: http://pcpartpicker.com/p/R9qtZL
CPU: Intel Core i5-4570S 2.9GHz Quad-Core Processor
Motherboard: Asus H87-PRO ATX LGA1150 Motherboard
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1333 Memory
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Gigabyte Radeon R7 260X 2GB WINDFORCE Video Card
Case: Thermaltake Element G ATX Mid Tower Case
Power Supply: Thermaltake TR2 430W ATX Power Supply
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer
Operating System: Microsoft Windows 10 Pro OEM (64-bit)
Wireless Network Adapter: Cisco AE2500 802.11n USB 2.0 Wi-Fi Adapter
Monitor: HP 23xi 60Hz 23.0" Monitor