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you would ALWAYS want to OVERCLOCK your MEMORY. always. theoretically the high clockfrequencies of graphic cards and processors are because of the memory bandwidth bottleneck. there is something called the "frequency curve". it shows the voltage and frequency graph of the architecture. at some point you get to a wall and don't get more frequency by increasing voltage. usually the architecture has an efficency point. the memory bandwidth problem pushes hardware manufacturer to run the hardware before the voltage wall rather than the efficiency point. the data transmission bottleneck is bypassed by higher clockrates partially because engine developers have adapted on it and build their software to work out the memory bandwidth bottleneck. means all video game developer, the engineers of the people who make the graphics possible have to work this out and it hurts the graphics since some expressions and graphics are not possible to create because of it.
