Here's a GTX 650 Ti running a 16% overclock, that "costs" all of 1 to 6 watts more. Yup. I heard board vendors hate bringing out new models...mainly from people who have never looked at the SKU line-up's available from vendors (e.g. MSI already lists six models of the card, while Asus lists seven) For what its worth, most of the GTX 650 Ti's seem to already rely on proprietary cooling solutions to differentiate themselves in the marketplace - some, like Sparkle even use a (gasp!) non reference PCB Memory overclocking has already demonstrated itself to be less effective than pipeline (GPU) overclocking- both from power/heat and net gain- hence the number factory overclocked cards that sport stock clocked memory...or the fact that when AMD transformed the HD 7950 to the 7950 Boost, the memory speed was left untouched.