Why is FX5700 so much slower than older Quadro?
I purchased a PNY NVIDIA Quadro4 900 XGL 128MB two years ago and have experienced terrific performance with it using it at a rather high resolution, 1600x1024x32 display.
A few months ago I purchased an ASUS V9570TD (NVIDIA GeForce FX 5700) 256MB. I did this because I needed more graphics RAM for textures for a software product I'm writing.
Much to my surprise after swapping out the cards and installing the latest NVIDIA driver (on Win XP Pro SP2) the FX 5700 is slow as heck 5-10FPS with OpenGL in a 1600x1024x32 window when the Quadro was 40-50 FPS with the exact same app and content.
Why is the two year old Quadro4 so much faster than the much newer FX5700? What am I missing? Shouldn't it be the other way around?
Thank you in advance for any enlightenment.