Tuesday, April 14, 2009

AMD-ATI RADEON HD 4890 Gadgets

Tuesday, April 14, 2009
AMD-ATI has officially submitted a few days with its new top of range, at least for the models to single GPU. We're talking about the RADEON HD 4890 gadgets.

Though it is not essentially a new architecture and thus the true successor of the family of GPUS, ATI has revised some technical aspects of RV770, in order to remain competitive in the market by presenting a card with benefits adjusted upward. In the ongoing struggle for the summit taking place in the world of graphics cards, including NVIDIA gadgets and ATI gadgets is not possible to rest long on their laurels, on pain of loss of dominance in performance resulting in a blurring of its image and loss of market share, what also already happened in the last few years, both the protagonists of this competition.

So, in order not to miss the peak, you must periodically renew its product line, if not deeply in architecture, which requires more time, at least in performance, which is precisely what has been done with this new tab.

Before you proceed with a quick overview of the art, Let together the main characteristics and differences with the previous HD 4870 gadgets.

At first sight it appears not have changed anything between RV770 and RV790 gadgets, if not the frequency of work and core memories. Texture filtering unit, and ROP stream processor figures were equal in number, are unchanged as well as a 256 bit bus, the kind of memories adopted GDDR5, and the production process stopped at 55 nm.

We are therefore faced with a simple over clock of the 4870 gadgets version? Yes and no, because the speech is not so simple. Who in fact knows the previous version of the card-edge AMD knows well that it was difficult to carry it over the 850 MHz and this was the limit for the largest increase in processing power. In order then to improve the performance it was necessary work of adapting a number of technical features, which has resulted in the final to allow the 4890 to work steadily to its default 850 MHz, but to be able to climb again more: in fact, some manufacturers will sell versions over clock from 900 MHz and it also speaks of the possibility of touching GHz and even exceed it. To achieve all this, the ATI engineers have taken on some components.


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