TomMar,
You may not gain anything better than what you are currently getting when installing the Apex 2800 card when playing video.
We are currently talking with Teradici support when using their apex 2800 card. Right now the scenario we have is two Windows 7 VMs being remoted into by quad display tera2 zero clients. One of the VM's displays are being offloaded by the apex card and the other one is not. Both VMs are clones so all settings are the same. When the offloaded VM plays a video file the PCoIP session's FPS (measured by the zero client's webpage statistics) is limited to ~21 FPS, however when the non-offloaded VM plays the same video file the PCoIP session's FPS is not limited and runs at about 30 FPS (what the actual video player application is able to decode at). The video application is stricly 2d video and is not utilizing the GPU (vSGA) to decode the video; it is all CPU. The response so far that we have gotten back from Teradici is that it looks to be a software bug with respect to the apex card and they are working to resolve it and will more than likely be pushed out with firmware 2.3 in the next few months. They mentioned some test builds may be avaliable in the next week or so, but I havent gotten a confirmation on that yet.
Regards,
Nathan