Thread: Sapphire Radeon HD4770 analyze

ATI would have issued its most recent technologies on the world in the kind of a hyper-fast high-end graphics card that would have cost a chance but with the publish of the HD4770 it has changed all that as not simply does this card have a world's first 40nm GPU it is as well directed at the lower end of the mainstream market.

Because the HD4770 is built on the 40nm procedure it has two discrete benefits over its siblings more dies can be made from a silicon wafer therefore cutting costs, and because of its smaller size it takes less power developing less heat and hence the clock speeds can be increased.

The HD4770 has 826 million transistors on its new 143.75mm² die equated with the 956 million of its two closest relatives the HD4830 and HD4850. It has 640 stream CPUs the similar as the 4830 but less than the 4850's 800. These processors run at the similar speed as the core clock 750MHz which is faster than both the HD4830 and the HD4850.

While the GD4770 only has a 128-bit memory surface equated to the 256-bit interface of the HD4830 and HD4850 ATI has prepared it with GDDR5 memory to acquire around the shortfall of the interface. The 512MB of Qimonda GDDR5 memory is clocked at 800MHz but because GDDR5 doubles the I/O throughput this becomes 3,200MHz effective, giving a very good 52.1GB/sec of memory bandwidth.

Awesomely given the price point of the HD4770 the cooler is a dual-slot one utilizing a copper heat sink and dual heat pipe design. If individual comes out with a single slot cooling answer for the GPU it would be a killer card to figure into a media center or small form factor PC giving this type of PC some reasonably good gaming performance at last.