Sheena85 Posted November 21, 2011 Share Posted November 21, 2011 Hello. I just overclocked my 2500k from 4 Ghz to 4.4 Ghz and i see no improvement in CPU AES (~444000) and CPU Photoworxx (~62500) and i want to know why. It is possible i'm memory bandwidth limited at this point ? Thx Maximum IV Gene-Z i5 2500k 8GB DDR3-1600 9-9-9-24-1T Windows 7 Ultimate 64bits Quote Link to comment Share on other sites More sharing options...
Fiery Posted November 21, 2011 Share Posted November 21, 2011 Do you use Turbo Boost? If yes, then can you please tell us all ratios you use? Max. Non-Turbo ratio, 1-core Turbo ratio, etc? Thanks, Fiery Quote Link to comment Share on other sites More sharing options...
Sheena85 Posted November 21, 2011 Author Share Posted November 21, 2011 Do you use Turbo Boost? If yes, then can you please tell us all ratios you use? Max. Non-Turbo ratio, 1-core Turbo ratio, etc? Thanks, Fiery I've set 44x multi overall. Turbo is enabled but is also set at 44x for all cores. So it's always 4.4ghz as soon as there any load on the CPU. AES is even down by ~500 points. At 4ghz it was 444000 now it's 443500. Core voltage is 1.32v tested stable with prime95 for 8h. Quote Link to comment Share on other sites More sharing options...
Fiery Posted November 21, 2011 Share Posted November 21, 2011 According to our own Sandy Bridge test runs -- albeit at slightly lower core clocks -- the mentioned AIDA64 benchmarks get memory bandwidth limited at high core clocks. You may want to use higher clocked DDR3 modules to squeeze out more performance from your system. Quote Link to comment Share on other sites More sharing options...
Squall Leonhart Posted December 6, 2011 Share Posted December 6, 2011 Fiery is right, the AES instructions are memory bandwidth hungry and in most benches show substantial improvements with higher clocked dram when overclocking. Quote Link to comment Share on other sites More sharing options...
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