Re: Replacing i3 CPU in E520 with i7 2630QM or 2820QM are this is possible ?
Install GPU-Z or HWINFO and find which graphic you have or use Lenovo PC doctor.
I Have this Lenovo Computers 1. Think Centre M58 from 2008 an it is still good (Intel Q9550, 8GB DDR3, Radeon 6970, Intel SSD) 2. ThinkPad E540 3 ThinkPad Tab 2 (with it I have many problems) 4. Lenovo Vibe Z2