How much does a GPU effect things like Photoshop?

[lumencreative]

I am going to be building a new PC for work as my current Dell Optiplex i3 is lagging (I can't believe how much prices have increased over the past year).

Anyway, as well as general office stuff, I spend a lot of time in Photoshop and regularly have 3 or 4 large Photoshop files open. As we are a design and print business, I frequently have artwork for 2000mm long banners (and longer) to work on, so need to make sure a pc can handle this without issues.

So, I'm just wondering how much significance a GPU has on how well things like Photoshop run and is it worth forking out for a particular GPU?

 

[lumencreative]

Thanks. I've always had low-ish end AMD gpu's in the past purely for dual monitor setup. Will have a look at the GTX1050's.