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hi i have a laptop dell 5521 15r with Core i7 3517U ultra low voltage processor with turbo boost up to 3.0Ghz the problem is when i put load on my system the maximum speed i get is 2.7Ghz what's the problem ?

I have Dell inspiron 15r 5521 with a clean installed yosemite 10.10, patched dsdt to disable Radeon card and i have a high battery usage compared to the same laptop with Windows 8.1 here my ioreg

Hey I installed Yosemite 10.10 in my laptop but i faced some problems 1- I get Random restarts "Tried to move icon from launchpad to launchpad icon in dock and i got a sudden restart". 2- The Sound volume is Low and headphone isn't working .. i have ALC 3221 and i use VoodooHDA 1.8.6...