Memory bandwidth efficiency in Sandra?

Question

Ran Sandra memory bandwidth test on my P5LD2 Deluxe with PD 930 and OCZ Pc5400(5300)(5-5-5).Had overclock to 3.4Ghz,921.8 system bus(CPU-Z).Results told me efficiency was only about 60% and to raise FSB.Each time I raised clock,FSB increased,but efficiency decreased.Without overclocking efficiency was at 75%.Tried SPD and manual settings for timings only to get same results,raised voltage by 1 to 1.9V and no boot.
Question is what can I do to increase efficiency at higher clock,FSB.Looks like changing multiplier is out of the question.Or am I better off with no OC and accepting 75%?Temp gets a little too much for me when I raise CPU voltage.My setup will be mainly for video editing /encoding.I'm not into extreme OC,but wanted to squeeze a little more juice out ,since it's there.Considering getting new RAM with lower timing,hoping this will help. Any help would be greatly appreciated.

Answer 1

Hi. I overclock and use just a bit of higher voltage, but I also liquid cool. Sometimes the risk and reduced life of the CPU (electrical migration) means it's better to accept just a little hit in performance. Faster memory MIGHT help, but that you'll have to check out.