Am i starving my a64 for memory bandwidth?

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hi, i used the DDR200 divider on my a8v to make ram at stock run at 100mhz (instead of 200mhz), and after my overclock that changes to 130mhz.. i also lowered the timings to exploit this... this unfortunately is the only way i can get to 2600mhz stabley, and was wondering how much performance im losing out on!

sisoft sandra reports my bandwidth as 3880mb/s, as opposed to 6200ish if i left it at 200mhz with no overclocking
my specs are in sig, can you tell me if this will impact performance much??

thanks

 

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