1600x1200 instead of 1680x1050

[dofumu]

Hey guys, I have a big problem.. I tried to overclock my monitor (few weeks ago) but I failed and now my max monitor resolution is 1600x1200 instead of 1680x1050
I heard something about monitor edid but I don't know how to repair it
( I can create a custom resolution with CRU but help just for a moment..if I will reinstall the gpu driver or the windows I will have the same problem )
And when I choose 1600x1200 or if I put gpu scaling on (I need this to get black bars in csgo =] ) I get this message: out of range 74.9khz/60hz (or something like this)
gpu : asus HD 7790
monitor : lg flatron w2241s

 

[dofumu]

nobody ?

 

[lakimens]

Well, I know nothing about monitor ovreclocking, but I know it's dangerous and you shouldn't have done it. Especially on such old hardware.