First of all I love the PMDG 737, but I noticed something. I installed and got my Radeon 9600 Pro 256 MB card running. When flying the default planes with all the sliders to the right, i was getting FPS in the 50-60 range in airports like Gatwick, O'Hare, Nassau in the Bahamas and Swiss airports in the Mountains. Now when flying the PMDG, I would be lucky to get a constant frame rate in the low teens and even got 1 FPS while trying to land at KCLE. BOth products are amazing, but I just wish we could get the best of both worlds. Flying with default planes was smooth and steady with NO studders. It was amazing. But in the PMDG, i would get studders of up to about 5 seconds or more. When changing views, it would lock up even longer. And when trying to use the kneeboard to get plates and weather, FS would close and go to windows. It made landing impossible even with the autoland. I am getting more ram this week, going from 256 and adding 512 more of rdramm, so hopefully that will make the 737 flyable. But flying the defaults with the sliders up and having smooth flight made me realize how much i wish the 737 would act even somewhat close to that! We'll see!!!!Brad

If you were to post your system specs, some of the good folks here might be able to help you maximize your experience and give you some thoughts on hardware upgrades.Note that frames in FS9 are wildly variable. I have a p4 2.6 and a Radeon 9700 and they range from the 50s down to the tens with the PMDG depending on weather, complexity of the airport, quality of the airplane visual model, altitude etc. Even with the default airplanes, high teens and low 20's is the norm for approaches in partly cloudy weather - and I have not installed any third party AI. Right now, there is no computer on the market that will allow you to fly the NG in complex weather, into a complex airport, with the sliders maxed, at 50 to 60 fps in phases of flight. Even the folks with the 3.2 gig chips and the latest mother boards struggle to get high 20's when close to the ground, in complex weather systems coming into busy airports.