How does MHz in GPUs influence gaming?

[Siberian]

So I'm comparing a few GPUs and I've found two that are quite similar. Only difference is the MHz, 775 vs 740. How does this influence gaming? Is it worth $30 more?

 

[Jamin43]

So I'm comparing a few GPUs and I've found two that are quite similar. Only difference is the MHz, 775 vs 740. How does this influence gaming? Is it worth $30 more?

Might want to post which GPU's you're looking at.

This article might help you choose a card

http://www.tomshardware.com/reviews/radeon-geforce-price,2323.html

 

[Damascus]

It depends on the core... Some cores (the more expensive ones) can do a lot more calculations per clock cycle - thus putting out more performance per MHz...
Think of it like the old AMD Athlons vs. Pentium 4's, an Athlon XP running at 2.2 Ghz could put out the same amount of work as a P4 running at 3 GHz (I don't remember the numbers exactly, this is just an example)... it's the same thing with GPUs.
As Jamin43 stated, it would help to know which GPUs you are looking at.

 

[Siberian]

These aren't the cards I talked about, I'm just wondering if the first one is better solely because has more MBs ? Are there other things that are equally important to look for?

http://www.gainward.com/main/vgapro.php?id=116

http://www.gainward.com/main/vgapro.php?id=106