Official release ATI Radeon HD 4870/4850 - Hardware review
Here we finally something, and wait for the official premiere of new graphic adapters ATI Radeon HD 4870 and ATI Radeon HD 4850 from Advanced Micro Devices (AMD)! The truth itself announcement with full confidence can now be regarded as pure formality, because after withdrawing producer in the middle of last week’s ban on the publication of photos, specifications and the results of independent tests younger model, many renowned manufacturers of graphics cards immediately rushed to announce the withdrawal to market their own products based not only the ATI Radeon HD 4850, but even on the ATI Radeon HD 4870. In this regard, the technical characteristics of both decisions are now fairly well known, however, this does not prevent us once again to remind them.
So, in the framework of new accelerators formed established on 55 - nm chip technology RV770 (956 million transistors), with ATI Radeon HD 4850 version applied RV770 PRO, while the more powerful new ATI Radeon HD 4870 received a modification RV770 XT, although in both cases the number of streaming processors equally well and 800. In doing so, each of the video card is made under the bus PCI Express 2.0 x16, has hardware compatibility with DirectX 10.1 Shader Model 4.1, uses 256 - bit memory interface, supports HDMI, HDCP and 7.1-channel audio, as well as “friendly” with such advanced technology brand As ATI CrossFireX Multi-GPU Technology, ATI PowerPlay and second-generation ATI Avivo HD Technology with an enhanced integrated video Unified Video Decoder 2. As for the communication capabilities of products, they represented two connectors Dual-Link DVI and one HDTV-output.
Now let’s talk about the differences. First, ATI Radeon HD 4850 has 512 MB of memory GDDR3, while ATI Radeon HD 4870 can boast the existence of a high-speed memory GDDR5 the same volume and is the first in the industry card equipped with precisely this type of memory. Secondly, the frequency of graphic indicators of the kernel and memory chips account for a 625/993 MHz ATI Radeon HD 4850 and 750/1800 MHz with ATI Radeon HD 4870. Well, and thirdly, different devices installed on their active air cooling systems. For example, ATI Radeon HD 4850 is completed odnoslotovym cooler with fan, a copper tube and heat radiator of aluminum and copper. But ATI Radeon HD 4870 developers equipped “Double” cooler, consisting of a larger “propellers”, a massive radiator with a lot of thin aluminum plates, copper base and a pair of thick copper heat pipes.
And now offer you a series of images, clearly demonstrating the anatomy of new accelerators. To begin, perhaps with a younger model ATI Radeon HD 4850.
If the talk about productivity, the results of our own testing ASUS EAH4850/HTDI/512M video cards based on ATI Radeon HD 4850 can be found in previously published reports, are taking advantage of this link. Regarding the computing power of ATI Radeon HD 4870, in the very near future on our web site will necessarily a complete review of all findings to the outcome of tests conducted.
Finally let you know that the recommended price of the company AMD ATI Radeon HD 4870 and ATI Radeon HD 4850 set at $ 300 and $ 200 respectively. Another worth noting that the purchase Radeon HD 4850 in the execution or Sapphire Technology Gigabyte can already be in Russia, buying truth, alas, will cost considerably more expensive.
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