I currently have a Ti4200 64 meg card on a P4 512mb system.I like many of you, am suffering from some stuttering especially when viewing 3d clouds in fs9.I have tweeked but I still get the stutters and I am wondering if an upgrade to the FX5600-ultra would be a worthwhile investment for about $200 through evga.Would appreciate your thoughts. I have researched on Tom's but would appreciate the users input.Thanks

I have a similar system, except mine's a AMD Athlon 2200+. I'd be interested to know the same info.

I don't believe the 5600 will resolve any stuttering you may see.... I'm running a 4200 with a lowly P3/800. The only time I see any stuttering is once every few moments when the aircraft transitions between weather stations and clouds around the perimeter are drawn. I had a GeF/2 before my 4200, and the results were exactly the same. I have to say, COF cloud smoothness in general improved when I turned off dynamic weather, and switched to Chris's clouds....-John

Keep your Ti4200!! It's as good as FX5600 (acording to well respected benchmarkers: 'Tom's Hardware; Anandtech' ) and wouldn't make a difference in your system. Since you are willing to "spend", upgrade your ram to at least 1GB, and if your board support's it, and if your p4 is "old" then upgrade your CPU also. $200 will buy you certainly another 512mb ram and a 2.5Ghz P4.Jos