About This File
Hi Guys !
I have uploaded my patched dsdt & ssdt files (BiG thanks to pokenguyen U ROCK MAN 
), if ur system specs are same as mine then u'll have no problems, my system is working perfectly with 2:45hrs battery timings and speedstep are working fine also system runs cool around 42c on idle & 55c on full load.
Dell inspiron 5520
Core i5 3210m @2.50Ghz
4GB DDR3 1600Mhz
500GB WD HDD
Intel HM77 Chipset
Intel HD 4000 (Enabled in DSDT) & ATI/AMD 7670m (Disabled in DSDT)
15'6 Display 1366x768p
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