If a GPU can't do a max resolution that another card can, is it still as powerful?

[cashoholic]

So I'm in the market for a 1060 6GB vs a 3GB card for future proofing. Also I mainly am going to be using this on a soon to be upgraded 1080p 50 inch to a 4k 55 inch. With this setup only, 1 HDMI will be needed, possibly a second smaller side monitor. Regardless, I'm curious, if card A with similar specs but capable of different (higher) resolutions, is more powerful than card B that has less ports and does a lower max resolution. I am already guessing it's the cores and clock speed that matter, but one is higher priced, and the one also has 2 power plugs (for over clocking?) while the other doesn't, and I just don't need the extra ports.
Here are the 2 cards in question:

https://ca.msi.com/Graphics-card/GeForce-GTX-1060-6GT-OCV1/Specification

https://www.newegg.ca/Product/Product.aspx?Item=N82E16814137040&cm_re=GeForce_GTX_1060_6gb_OCv1-_-14-137-040-_-Product

 

[getochkn]

Where are you seeing different resolutions?

And either way, a 1060 can't do 4K gaming regardless of 3 GB or 6 GB.

 

[cashoholic]

Sorry to be confusing, I'm not gaming in 4K, just explaining the setup. The card with more ports does a max resolution of 7680 x 4320, the lower end card does only 2560x1600, which is still good enough for me. The thing that gets me is the extra 4 pin connect...why? The cards do seem to be exactly the same otherwise, so was curious as the one card would seemingly need more "power" to run that higher res.

 

[getochkn]

Something is wrong then, because no modern card would have a 2560x1600 resolution, that's not even 4K and cards from 8 years ago can do better than that. Think their spec sheet is wrong.

https://www.nvidia.com/en-us/geforce/products/10series/geforce-gtx-1060/

go there and click on view full specs part way down. That's the reference Nvidia design and all will support that max resolution.

 

[cashoholic]

Ah, I figured it out. On the one website, it isn't displaying the "Digital" resolution. The "Max" that is listing 2560x1600 is for VGA only, so it was just a dumb spec list that should display both specs.