2 Replies Latest reply on Jan 27, 2011 6:19 AM by Terabytes

    core i5-520M - Is there a way to deactivate HT?


      I'm wondering if is there any possibility to disable HT in mobile core i5?


      I've got a i5 520m in one laptop and when I compare its rendering performance with my 3 years old c2d X9000 2,8GHz, the results are surprisingly bad for 520m.


      IBM ThinkPad T61p, 8GB RAM

      Penryn X9000 2,8GHz 6MB

      Toshiba Tecra S11, 4GB RAM

      core i5 520m 2,66GHz(with turbo) 3MB

      1min 10s3min 28s


      I remember from my previous experience with ht in Pentium 4 that is some cases the cpu with ht runs out of internal resources, which causes significant performance drop in comparision to same cpu with disabled ht. i5 520m has little cache and I assume that in my case it might perform more effectively without virtual cores and running extra threads.


      I've looked online but couldn't find any useful information regarding my question. Disabling 2 cores in Windows MSconfig turns off one physical core and BIOS has only virtualisation, multicore and turbo settings.