What do you think of this build

Stuff that can be changed:





CPU: fx 6300



Mobo: Asus M5A78L LE



RAM: CORSAIR XMS3 8GB TW3X4G133C9A





Other stuff that i already bought.





Asus R9 270 



CORSAIR CMPSU-400CX



WD 500gb HDD



Hatachi 500gb HDD

You could upgrade to a FX 8320 or 8350 for slightly more money, but other than that it looks good

can i overclock 6300 with that board tho

I would not recommend it.  I would also not recommend putting an 8 core into that board.  There are not enough power phases to handle it.

how about:  MSI 760GM-P23(FX)

All M-ATX AM3+ were designed for Athlon CPUs, not the FX-series.  I would not get anything over a FX-6300 for those motherboards.

but it does support all 95W cpu's so let me get this straight if i get a cpu and overvolt it over 95W it will brake. And if i get a cpu hat is already more than 95W it will no work 

Support does not equal recommended.  However, it's a good reference point to stay under the 95W CPU TDP limit.