AcceleratorX
Youngling
Whatever you say above, lets see the current market condition in India. The cheapest 550Ti I found online is close to 8k, the Sapphire 6790 can be had for some 150-200 bucks less, and arguably performs better than 550Ti. In comparison, the 6770 can be found within 7k in most of the places, sometimes as low as 6.5k.
At these price point, whatever performance advantages the 550Ti has over its competitors, if any, simply vaporize. In simple terms, you have 7k, get a 6770, you have 1k more, get a 6790. The 550Ti is just not priced properly as far as Indian market is concerned.
Well, I agree, but when I bought my 550 Ti, 6790 was costing more, maybe because it was just released at that point. Of course market conditions keep changing. Considering current prices, the 6790 is probably better, and the 6770 is an old classic in any case. In any case, Sapphire's Radeon cards are among the cheapest, and given my experience with my 5770, I would probably not recommend this brand again. Better to pay a little more and go for an Asus or MSI.
I just wanted to clear the air a little because everyone was saying that the 550 Ti was crap, well, it may be a little displaced but it's certainly not crap. The reason for it's initial low performance was that it utilized a new memory controller that is not there in any other GeForce 5xx product. I think NVIDIA is still putting in optimizations for this and we will probably see more implementations of this new design in the GeForce 600 series.
A potentially big problem with the 6790 (and the GeForce GTX 460) is that most cards require two 6-pin power connectors (AFAIK so far only PowerColor's 6790 cards do not require two 6-pin connectors). Many people buying these mid-range cards will probably not have two 6-pin connectors to spare, having to resort to using converters and the like instead (this is not optimal). On the other hand, the HD 6850 does not need this and thus presents an excellent mid-range option for the price given the type of PC it will be put on.
These are just additional things to consider apart from purely performance and/or features, but it does seem to me that each card below the 6850 has its own unique drawbacks
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