Originally posted by: polara
Further research reveals that the Intel G45/GMA X4500HD chipset DOES support DVI + HDMI simultaneous output. I am now looking at the ASUS P5Q-EM - as a possibility. At $125 it's a bit pricey, but would solve my needs. I would probably pair it with the Intel E6300 at $80 - for a total of $205.
I would triple-check that information. Every Intel IGP up to at least G35 can only support one analog + one digital output simultaneously. I know the ASUS manual for P5Q-EM states that
any two outputs can be used, but I would not take what the manual states as gospel. It wouldn't be the first error made in a user manual. This seems to contradict what ASUS says on its marketing overview/specs page: "The interface of this motherboard supports dual VGA output both DVI-D/HDMI and RGB."
i.e. this seems to suggest that DVI and HDMI are shared, which is consistent with the limitations clearly specified in the user manual for Intel's own DG45ID motherboard and Intel's block diagram for the chipset. Further, if you should ever install a PCI Express card into the PCI-E x16 slot, you lose digital output on the IGP, leaving only analog output, due to an Intel chipset limitation.
Its your money, but it doesn't make much sense to pay a huge premium for a premium IGP solution like Intel G45, when an inexpensive Radeon HD 4650 or GeForce 9500GT graphics card will be far superior to any current IGP. In addition, Photoshop CS4 has new GPU acceleration features that aren't going to run too well on an IGP.