If all GTX are the same base speeds (400mhz core, 1.2gig ram) then wouldn't it be true that if I bought the lowest factory OCed card (since I haven't seen any that aren't pre-OCed) to save cash and did the OCing myself I could get any of the cards to reach the 490 core speed/ 1.3gig mem clock of the eVGA KO ECS. The ONLY difference will be that whichever card I buy I would viod warrenty by OCing where the eVGA factory setting will be warrentied?