maximum monitor support vista

I know XP only officially supported 10 monitors (via multiheaded graphic cards).
Does anyone know what the maximum number of monitors supported in Vista?
Thanks

On Sun, 16 Jul 2006 23:17:17 -0400, "stevems@stevems.com" wrote:

I know XP only officially supported 10 monitors (via multiheaded graphic cards).
Does anyone know what the maximum number of monitors supported in Vista?
Thanks

I don't know for sure. According to information I have seen: It probably depends on whether you are using WDDM (Vista style) or XDDM (XP style) display drivers.
WDDM doesn't support multicard PCI configurations (only PCIe) so you'd be limited by the number of PCI express slots of the correct physical size you have. WDDM requires that all the video cards be controlled by the same driver, you can't mix cards from different vendors. I don't really know how many simultaneous monitors are supported with WDDM. Overall the new WDDM isn't as general as XDDM, so it wouldn't surprise me if the limit was less than or equal to the XP limit. I would guess that the situation when using XDDM drivers is roughly the same as XP, but of course you don't get the benefits of WDDM drivers.
Chris

Thanks Chris.
It sure is hard to get any information on this topic -- but from what little I've been able to find it seems your observation that the number of screens being less than or equal to XP is probably on target.
Thanks for taking the time to respond.