New DS comp game problems

Well I just got my new comp today and I am having problems. First game I installed which I was dieing to play was counterstrike 1.6. For a quick test. Problem is before I had windows xp and it was easy to just use nvtray to force refreshrates for each resolution. I could put my 1076 x 768 @ 144 hz on my CRT moniter.
Its a samsung 1100df. Now it seems to only go to 100 hz but when I play the game, I see mest up laggy waves on the screen. Its not all smooth like before. Not sure if its Vista or my video card. I am running SLI 3 way. I can get my desktop to be 100 refresh ok its seems.. but my games are not working good..
Any help is would be greatful.









System Configuration:
Chassis: Digital Storm 850Si
Exterior Finish: - Standard Factory Finish
Interior Finish: - Standard Factory Finish
Power Supply: 1200W PC Power & Cooling (Turbo-Cool Edition) (Dual/Triple/Quad SLI Compatible)
Processor: Intel Core 2 Quad Extreme QX9770 3.20GHz (1600MHz FSB) (12MB Cache)
Motherboard: nVidia 790i Ultra Core 2 Quad (nForce 790i Ultra SLI) (DDR3 Only)
System Memory: 8GB DDR3 1600MHz Corsair Dominator DHX (High-Performance)
Card Reader: - No Thanks
Hard Drive 1: 300GB Western Digital VelociRaptor (10K RPM) (16MB Cache) (Extreme Speed)
Hard Drive 2: 1TB Western Digital (7200 RPM) (16MB Cache) (SATA) (Extreme Speed)
Raid Option: - No Thanks
Hard Drive 3: - No Thanks
Optical Drive 1: DVD±R/RW/CD-R/RW (DVD Writer 20x / CD-Writer 48x)
Optical Drive 2: - No Thanks
Wireless Access: High Speed Network Port (Supports High-Speed Cable / DSL / Network Connections)
Video Card(s): 3x SLI Triple (NVIDIA GeForce GTX 280 1GB) (Includes PhysX Technology)
TV Tuner: - No Thanks
Sound Card: Integrated Motherboard Audio
Extreme Cooling: Liquid Chilled FrostBite CPU Only
Internal Lighting: Blizzard Internal Lighting (Blue Edition) (Cold Cathode Tubes)
Modifications: - No Thanks
CPU Boost: Yes, Overclock the processor as much as possible with complete stability
Graphics Boost: - No Thanks, Please do not overclock my video card(s)
Memory Boost: - No Thanks, Please do not overclock my memory
Windows Boost: - No Thanks, Please do not tweak the services on the operating system
Windows OS: Microsoft Windows Vista Home Premium (64-Bit Edition) (For Enthusiasts)
Restore Kit: Digital Storm Specialized Recovery System (DVD Image Based)
Protection: - No Thanks
Office: - No Thanks
Benchmarking: - No Thanks
Pre-Install Game: - No Thanks
LCD Display: - No Thanks
Surge Shield: - No Thanks
Speakers: - No Thanks
Keyboard: - No Thanks
Mouse: - No Thanks
External Storage: - No Thanks
Warranty: 3 Year Platinum Care Extended Parts & Labor Warranty

I used software but it dont work.. you recommend anything?
Rivatuner caused problems I had to reinstall my vid drivs.
What I dont get is why I cant achieve 144 hz on my desktop..

only gets me to like 85 hz...