I'm hoping someone can help with this issue.
I was running Premiere CS3 with 2 graphics cards. An ATI 512MB HD 3650 as the primary card with 2 monitors connected, and an ATI 1GB EAH 4550 with a 16" 720p HDMI TV attached.
While editing HDV everything ran smooth, I could set the "external device" in the "playback settings" to "monitor 3" and everything was fine. I could preview 720p 1080i and 1080p HDV clips from the source or record monitor through HDMI perfectly on the 720p TV.
For obvious 64bit vs 32bit reasons I changed to CS5 and all is not good.
Playback when I select the 3rd monitor as the "external device" in "play back settings" becomes really rough and stuttery in the source/record monitors and on the external device.
I also need to set the "playback resolution" to "half" or it displays the video (only on the external device) with the pixels squashed to square.
Upgrading to a GPU accelarated compatile card for the Mercury Playback Engine sadly isn't an option at this moment. Does anyone know if I'm missing something and I can make this run as it did on CS3 without changing any hardware?
I'm also running a core2quad Q6600 with 8gb Corsair Dominator RAM at 1066MHz on an Asus P5Q Deluxe (P45 Chipset) Mobo.