MoreYummy :
It is different question. Yesterday is about crossfire.
Today I want to choose high end old tech card, or low end with new tech card.
Thank bkoop for the link, I will take a look.
Dunno if you really asked this earlier, but I will say the older generation card (the 6850) is not a high end card. It was only a mid-range card (a good one at that). The 7770 is at the low end of the current mid-range cards. A high end card would be something like the 6950, 6970, 7950, 7970. Possibly even a 7870 XT or GHZ.
As for your actual question, Are you talking about the 7750 or 7770? If its the 7750, get the 6850 instead. Otherwise get the 7770 if that's what you were talking about.