Hello all! I'm new here, but not noob in overclocking 9550. Some time ago i sended my burned GigaByte 9550 to guaranty service. They've replaced my card with other one, but.. with locked RAM freqeuncy! I tried many bioses with different memory settings, different drivers (stock, omega, dna) and RAM freq is always the same! I can overclock to e.g. 1000 MHz, but card still works as 400MHz (everest shows 500/1000, but 3dmark rate is ~1400) That's why I think it's hardware lock. Does anyone know how to bypass it? HELP!!!