Thank you, mrhanman!
This started happening across the board, including the games that were working fine before. It's not very prominent when not much happening in the game. Watching mp4/avi does not seem to be affected either. However I need to do more testing with that.
Here is the system summary:
--------[ Summary ]-----------------------------------------------------------------------------------------------------
Computer:
Computer Type ACPI x64-based PC
Operating System Microsoft Windows 8.1 Professional
OS Service Pack -
Internet Explorer 11.0.9600.17239
DirectX DirectX 11.2
Date / Time 2014-08-18 / 10:53
Motherboard:
CPU Type DualCore Intel Core 2 Duo E6600, 2400 MHz (9 x 267)
Motherboard Name Asus P5W DH Deluxe (3 PCI, 2 PCI-E x1, 2 PCI-E x16, 4 DDR2 DIMM, Audio, Dual Gigabit LAN, IEEE-1394)
Motherboard Chipset Intel Glenwood-DG i975X
System Memory 6144 MB (DDR2-800 DDR2 SDRAM)
DIMM1: G Skill F2-6400PHU1-1GBNR 1 GB DDR2-800 DDR2 SDRAM (5-5-5-15 @ 400 MHz) (4-4-4-10 @ 266 MHz)
DIMM2: Kingston 99U5429-007.A00LF 2 GB DDR2-800 DDR2 SDRAM (6-6-6-18 @ 400 MHz) (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz)
DIMM3: G Skill F2-6400PHU1-1GBNR 1 GB DDR2-800 DDR2 SDRAM (5-5-5-15 @ 400 MHz) (4-4-4-10 @ 266 MHz)
DIMM4: Kingston 99U5429-007.A00LF 2 GB DDR2-800 DDR2 SDRAM (6-6-6-18 @ 400 MHz) (5-5-5-15 @ 333 MHz) (4-4-4-12 @ 266 MHz)
BIOS Type AMI (06/17/09)
Communication Port Communications Port (COM1)
Display:
Video Adapter NVIDIA GeForce GTX 760 (2 GB)
Video Adapter NVIDIA GeForce GTX 760 (2 GB)
Video Adapter NVIDIA GeForce GTX 760 (2 GB)
Video Adapter NVIDIA GeForce GTX 760 (2 GB)
3D Accelerator nVIDIA GeForce GTX 760
Monitor Acer T230H [23" LCD] (LHS0B0067520)
Multimedia:
Audio Adapter nVIDIA HDMI/DP @ nVIDIA GK104 - High Definition Audio Controller
Audio Adapter Realtek ALC882/D/M @ Intel 82801GB ICH7 - High Definition Audio Controller [A-1]
Storage:
IDE Controller Intel(R) ICH7 Family Ultra ATA Storage Controllers - 27DF
IDE Controller Intel(R) N10/ICH7 Family Serial ATA Storage Controller - 27C0
Storage Controller JMicron JMB36X Controller
Storage Controller Microsoft Storage Spaces Controller
Disk Drive WDC WD2002FAEX-007BA0 ATA Device (2000 GB, 7200 RPM, SATA-III)
Disk Drive ST310005 28AS USB Device (1000 GB, 7200 RPM, SATA-II)
Disk Drive ST32000542AS ATA Device (2000 GB, 5900 RPM, SATA-II)
Disk Drive ST32000542AS ATA Device (2000 GB, 5900 RPM, SATA-II)
Optical Drive DTSOFT Virtual CdRom Device
Optical Drive LITE-ON DVDRW SOHW-1693S ATA Device (DVD+R9:4x, DVD-R9:4x, DVD+RW:16x/8x, DVD-RW:16x/6x, DVD-ROM:16x, CD:48x/24x/48x DVD+RW/DVD-RW)
SMART Hard Disks Status OK
Partitions:
C: (NTFS) 1863.0 GB (16.1 GB free)
D: (NTFS) 1863.0 GB (169.8 GB free)
E: (NTFS) 1863.0 GB (74.3 GB free)
F: (NTFS) 931.5 GB (0.2 GB free)
Input:
Keyboard HID Keyboard Device
Keyboard Standard PS/2 Keyboard
Mouse HID-compliant mouse
Mouse HID-compliant mouse
Network:
Network Adapter Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller
Network Adapter Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller
Network Adapter Realtek RTL8187 Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter (192.168.2.2)
Network Adapter TeamViewer VPN Adapter
Network Adapter VirtualBox Host-Only Ethernet Adapter (192.168.56.1)
Peripherals:
Printer CutePDF Writer
Printer Fax
Printer Microsoft XPS Document Writer
Printer Send To OneNote 2013
Printer Snagit 11
FireWire Controller Texas Instruments TSB43AB22 1394A-2000 OHCI PHY/Link-Layer Controller (PHY: TI TSB41AB1/2)
USB1 Controller Intel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 Controller Intel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 Controller Intel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB1 Controller Intel 82801GB ICH7 - USB Universal Host Controller [A-1]
USB2 Controller Intel 82801GB ICH7 - Enhanced USB2 Controller [A-1]
USB Device Generic USB Hub
USB Device Generic USB Hub
USB Device Generic USB Hub
USB Device Microsoft Hardware USB Mouse
USB Device Microsoft LifeChat LX-3000
USB Device Realtek RTL8187 Wireless 802.11b/g 54Mbps USB 2.0 Network Adapter
USB Device USB Composite Device
USB Device USB Composite Device
USB Device USB Input Device (Logitech Download Assistant)
USB Device USB Input Device
USB Device USB Input Device
USB Device USB Input Device
USB Device USB Mass Storage Device
USB Device Xbox 360 Wireless Receiver for Windows
DMI:
DMI BIOS Vendor American Megatrends Inc.
DMI BIOS Version 2901
DMI System Manufacturer ASUSTEK COMPUTER INC
DMI System Product P5W DH Deluxe
DMI System Version System Version
DMI System Serial Number System Serial Number
DMI Motherboard Manufacturer ASUSTeK Computer INC.
DMI Motherboard Product P5W DH Deluxe
DMI Motherboard Version Rev 1.xx
DMI Motherboard Serial Number MB-1234567890
DMI Chassis Manufacturer Chassis Manufacture
DMI Chassis Version Chassis Version
DMI Chassis Serial Number Chassis Serial Number
DMI Chassis Asset Tag Asset-1234567890
DMI Chassis Type Desktop Case
DMI Total / Free Memory Sockets 4 / 0