CSS Nade Stutter and Nuke Stutter

[JamesU2005]

Have an E6600, 2GB RAM and 8800GTX with Vista 64bit.

When I throw or get a nade thrown at me there is a little stutter like a few dropped FPS when it explodes.

Also when playing on Nuke and go from inside to outside again I get a quick little stutter. I think this is to do with HDR but surely my spec PC is fine for this.

Any ideas?

 

[JamesU2005]

162.22

Does that make a difference?

 

[JamesU2005]

Built in.

 

[JamesU2005]

Seems I must be the only one with the Issue.

Darn, have to hope it stops.

 

[JamesU2005]

Perhaps that's it.

Whats the difference between:

Creative X-Fi Xtreme Gamer

and

Creative X-Fi Xtreme Gamer Fatal1ty Professional 7.1 Soundcard

Which might fix my issue?