On the advice from Solarstarshines I installed AMD/ATI CCC 10.9 used Overdrive and found I get no stalls and jumps in my games (tried Sawoid and Halo) my CPU is already OCd and now I'm using custom clocks on my graphics card, temps are OK and all is running well 
SIW
SIW
My Computer
- Computer Manufacturer/Model Number
- Home Built
- OS
- Windows 7 Professional 64-bit SP1
- CPU
- Intel E8400
- Motherboard
- MSI P35 Neo
- Memory
- 4GB Crucial Ballistix
- Graphics Card(s)
- ATI ASUS Radeon HD 4830
- Sound Card
- Realtek ALC888 on Board
- Monitor(s) Displays
- Asus 22-inch VH226H Widescreen
- Screen Resolution
- 1920 x 1080
- Hard Drives
- Two Western Digital 500GB
- PSU
- Hiper HPU-4M 530W
- Case
- Thermaltake Tsunami Dream Black
- Cooling
- Air/Fans
- Keyboard
- Saitek Eclipse
- Mouse
- Razer
- Internet Speed
- Sky Broadband
- Other Info
- USB Hub/Card Reader - 2 Pen Drives, 1 Phone Dock
