After creating the install USB 3 times and 5 re-installs, I got Yosemite working without booting from USB.
I noticed on the 5th install in disk utility, it got problems formatting the disk.
Then i re-applied formatting partition and it got successful.
During the last 4 installs, the partition size after applying is 320GB.
On the 5th install, size is 319.xxGB.
Now, i wait for audio fix.
Hope this helps to those who got the same error as I did.