"This ONLY happens when I share the 3D display via webcast"
the webcasting is the issue and an additional video card won't help. if you're trying to push your display out on the web, most of the hardware accelerated display features will be disabled.
I'm configuring a new workstation and am wondering, aside from cost, what are the advantages or drawbacks between having dual 256MB graphics cards and one 512MB card?
I plan on having two 22" monitors (but will NOT need four) and my question is specific to overloading the video card (processor?) when I have two programs that COMPETE for it.
My current PC has one 256MB card and when I use a graphic-intensive program (w/3D GIS or CAD display) and webcasting software at the same time, the display gets bogged down (i.e., extremely slow refresh rate). This ONLY happens when I share the 3D display via webcast ...or, as a 'workaround' I can reduce the display resolution down to 1024x768; anything higher bogs down. Otherwise, each program works great independently.
I'm guessing that the dual 256MB card configuration would be preferable but am not familiar with the technical part of how each program "calls on" the graphics card (memory? cache?) to do the work ...maybe the 512 would be better? If I just use one monitor, is the answer different?
The specific comparison that I'm interested in is:
a. Two 256MB PCIe x16 nVidia Quadro FX570
b. One 512MB PCIe x16 Nvidia Quadro FX1700 (costs ~300 bucks more)
Thanks in advance,