What's more important on a video card: Core Clock or Memory Clock? Between these two cards, which is better?

MSI N9800GT-T2D512-OC GeForce 9800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card



http://www.newegg.com/Product/Product.as…



ZOTAC ZT-98GES5P-FCP GeForce 9800 GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail



http://www.newegg.com/Product/Product.as… |||The Gigabyte would be the best one. The core clocks on them are basically the same but the gigabyte 1 has 1gb of memory and a better cooling component. It is also smaller. If you budget isn't a problem get the last one as it is better but more expensive. If you plan on playing games but not like crysis on highest the other 2 will do, if you do get the other ones instead the Zotac would be your next choice.



EDIT: core clock is more important