What is better?

[zZSuperNoodleZz]

Okay I'm fairly new to pc gaming/hardware and I was just wondering if its better to have a slightly worse graphics card that has more memory of a better card with less memory?
I'm looking at the Sapphire 6570 1GB and the Sapphire 5670 512MB and I'd be on a 24" 1920x1080 and a old 15" at around 1300x700 (I can't remember exactly and I'm on a different computer) then maybe switching the 15" for a 19" monitor at some point if that makes a difference? (I seem to think that the memory helps with bigger displays?)
Also I know those cards are not brilliant but they should play most games now on decent fps?, BFBC2, Cod 4, ect?
Thanks

 

[Surveyor]

Hi and welcome to the forum.

I doubt either of those cards are going to give you playable frame rates at 1920x1080.

 

[Marine-RX179]

The bare minimum you need is 6850/GTX460.

 

[zZSuperNoodleZz]

Ok thanks for the info guys I'm looking at the 6850/6870s.
And it was my own fault, all the videos on youtube I'd watched for the 6570/5670 were in tiny resolutions and I hadn't noticed
Oh and just wondering does anybody know if a 6850 will play BF3 or will I have to upgrade again?
Many Thanks!

 

[Surveyor]

FYI your signature is too big.

4 lines of text only.

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[zZSuperNoodleZz]

Apologies, I hadn't thought about the FAQ's I just rushed on and started asking questions Thanks for telling me.