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HD 7750 ถูกกว่า HD 7770 ตั้ง 10$ 
source: http://www.fudzilla.com/graphics/item/25363-radeon-hd-7770-brings-28nm-for-$149
The Radeon HD 7770 is based on the Cape Verde XT chip and it should end up clocked at 900MHz. It has 896 stream processors as well as 56 texture units and 16 ROPs. The memory is clocked at 1375MHz (5.5GHz GDDR5 effective).
Since the card is trimmed to a 128-bit memory interface, its memory bandwidth is 88GB/s and it comes with 1GB memory. It should start selling at some point in February for $149.
The runner up is HD 7750 based on Cape Verde PRO, works at 900MHz has 832shaders, 52 TMUs and 16 ROPs. The memory works at 5.0GHz bringing the total possible bandwidth to 80 GB/s for its 1GB of memory. This one will sell for $10 less, or $139.
Of course, for more demanding users Pitcairn cards will be the preferred choice. The HD 7870 and HD 7850 feature a 256-bit memory bus, along with more shaders and higher clocks. They will sell for $299 and $249 respectively.
Since the card is trimmed to a 128-bit memory interface, its memory bandwidth is 88GB/s and it comes with 1GB memory. It should start selling at some point in February for $149.
The runner up is HD 7750 based on Cape Verde PRO, works at 900MHz has 832shaders, 52 TMUs and 16 ROPs. The memory works at 5.0GHz bringing the total possible bandwidth to 80 GB/s for its 1GB of memory. This one will sell for $10 less, or $139.
Of course, for more demanding users Pitcairn cards will be the preferred choice. The HD 7870 and HD 7850 feature a 256-bit memory bus, along with more shaders and higher clocks. They will sell for $299 and $249 respectively.
source: http://www.fudzilla.com/graphics/item/25363-radeon-hd-7770-brings-28nm-for-$149
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