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The GPU doesn't determine the color gamut in any way.
Only the display determines the gamut of what is displayed.
As far as I know, Crossfire will only help with games, not with programs like Photoshop.
Thank you Chris. You offer a lot of help here. this was a quick response.
So I should ask the question a different way. Are the FirePro cards' set up, chipsets etc., more helpful to everyday Photoshop work than Radeon cards with the same amount of memory?
No 3D or video work for me. Just photo editing. Use of layers.
There are $375 FirePro cards i could stretch to buy... but what do these boards/chipsets offer for the extra scratch? ATI' site is vague quantifying this.
The FirePro boards are mostly aimed at CAD software. The only advantage I know of for Photoshop use is 10 bit/channel display buffers - if you have a compatible display (DisplayPort only).
I recommend something like the VisionTek ATI Radeon HD 7750 or if your computer power supply and budget can handle a bit more, the faster 7850.
Thanks, Noel. I have been reading your other posts for guidance, too. I will look at these. I have a Corsair Pro 800 or 850 and there's not going to be that much stuff in the case drawing power. No overclocking on the new build: i7-3770(not the "K"). Adding a Fireware card... not too radical. DH77CK Intel mobo.
Those Ivy Bridge processors are potent, and the price is very good.
I'm partial to the Xeon line myself, because I like multiple-processor workstation systems, but MAN they're expensive!
I like this site for comparing processor power, by the way: http://www.cpubenchmark.net/