MSI R9 270X HAWK low GPU usage and screen flickering problem

Question

I bought an MSI R9 270X HAWK vga and I have this screen flickering issue.
My S/N: 602-V303-02SB1310009419
I also had another problem: the GPU usage averages at 50-55% on every game (DX9,10,11 games like TESV Skyrim, League of Legends, Crysis 2-3, Battlefield 2-3, Far Cry 3) and never reaches more than 80%(well, once I made it run at 99%, I used ultra settings on Battlefield 4 with Sync on, Ultra preset settings with 200% res. scale so pretty much the maxed out Settings). I'm using this card with 8GB DDR3 Corsair Vengeance RAM with a stock clocked 1090T and AMD's reply for this problem was, that this problem can be driver problem as well as VBIOS.

Answer 1

I created a bootable usb, placed the files in it (formated, and only these files were at the usb, dos startup directed to win98boot's folder (C:\win98boot) renamed the tv303ms.134 to tv303ms.rom,l after i placed it on the usb and in the boot menu there are four additional options related to the USB (there's no USB only option): FDD, HDD, CDROM, zip. Selecting the FDD and CDROM starts the windows normally, The HDD option ended on the white-black screen, and there's where I can write:   C:\>
after this i tried to type in: atiflash.exe TV303MS.rom [enter] nothing happened, then atiflash.exe [enter] and popped up some help instructions for the use of atiflash, I pressed enter over and over and then requested another command, I tiped in the tv303ms.rom [enter] and again nothing happened (invalid command I think). What should I do now ? I did some research but still can't figure out what the problem is. :/ (If I done everything correct, maybe the problem related to my motherboard or USB stick?)