ok so as per the title i want a consensus from members on some particular OC numbers from some cards in the GT200 series, exactly 3 questions to be precise. 1. What clock speeds does a GTX 260 core 216 need to attain GTX 280 actual performance 2. What clock speeds does a GTX 260 core 192 need to attain GTX 280 actual performance. I do realize that some situations the physical (ie framebuffer) difference will prohibit attaining 280 performance, but on the whole (1920x1200 and below) i know 280 actual performance is possible. My thoughts on those 2 clock frequencies are about the same with a varying shader clock only. my guesses are. GTX260 core216 - core: 684mhz - shader: 1436 mhz - Memory: 2430mhz GTX260 core192 - core: 684mhz - shader: 1620 mhz - Memory: 2430mhz 3. what clocks on a 295 to get GTX280 SLi actual performance. My guess is, core: 684mhz - shader: 1296 mhz - Memory: 2430mhz All of these numbers are based on the theoretical peak specs of all cards, like core clock X rops gets you pixel fillrate, calculating mem bandwith and finally shader compute power. I have found interestingly that at the aforementioned guess speeds, the GTX260 + 295 cards i have tested equal their rivals or surpass them due to a clock speed advantage. i realize if you overclock the 280 (SLi) they will naturally win out but its an interesting question. thoughts?