[Q] I9100G JB kernel supporting overclocking

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http://forum.xda-developers.com – Hello! I flashed Vanilla Rootbox 2.6.1 JB rom to my I9100G from here - http://forum.xda-developers.com/show....php?t=1814532 It is running smoothly but I found out that the kernel with it does not support overclocking. I searched and found 2 kernels - 1. horsepower 3.0.0 http://forum.xda-developers.com/show....php?t=1749591 2. TWRP 2.2 http://forum.xda-developers.com/show....php?t=1782677 Are both of these compatible with my system? Also i am going to upgrade to Vanilla rootbox v2.7 shortly. is it necessary to flash the kernel before the rom? Thank you! :) (HowTos)