Do not we have been able to account for changes in the timetable for preparation accelerators Radeon HD 4850/4870 based on RV770, as podospeli new information about future products AMD. In order observers sites Hardware-Infos TG Daily hit and details of the specifications and costs of new graphics cards, immediately became the public domain. Some of these characteristics are no longer secret, due diligence and clandestine informants close to production sources that during the three-month supply us rumours on RV770. Nevertheless, in recent publications and there is certainly something that will interest our readers, CCM to the evolution of the game graphics.
 
In the first time the company AMD is going to release three accelerator based on RV770. The next scheduled monthly output of two models: Radeon HD 4870 and HD 4850, a new type of memory equipped GDDR5 volume of 1 GB and 512 MB respectively. More than cheap modification Radeon HD 4850 with 256 and 512 MB of memory GDDR3, focusing primarily on OEM-market are likely to see some light at a later date. Clearly, the mission Radeon HD 4850/4870 is to strengthen the range of graphic AMD in the productive segment and subsequently replacement cards Radeon HD 3850/3870.
 
The big surprise was the news that developers of AMD have decided to embark on the path of his colleagues from the company and NVIDIA otvyazali frequency streaming processors from other blocks of graphic chip. In the case of the older model Radeon HD 4870 ability RV770 asynchrony allowed to set the frequency domain-level Shader 1050 MHz, while other units are working at 850 MHz. Now it is understandable that rumors of overcoming 1 - Hz barrier mentioned in our previous submission on the topic of new accelerators AMD, include: the universal conveyor. Regarding the younger Radeon HD 4850 graphics card, its Shader domain works at 850 MHz, while the remaining blocks of the nucleus - at 650 MHz.
 
AMD has decided to increase the capacity of the new graphics accelerator with the help of GDDR5 memory with a high clock frequency, unlike NVIDIA, which in the design GT200 considered advisable to remain faithful GDDR3, but to expand the width of the interface to 512 bits. Memory Radeon HD 4870 is 1935 (3870) MHz. Radeon HD 4850 graphics with GDDR5 should work on 1728 (3456) MHz. As we can see, in theory a new type of graphics memory shows itself with the best side. According to the new memory capacity 256 - bit graphics card ahead of Radeon HD 2900 XT with 512 - bit bus.
 
Sources confirm information about doubling the number of textured processors (TMU), compared with the previous generation videochipom RV670. Obviously, this measure will improve markedly textured performance accelerators, “Achilles heel” of recent products ATI / AMD.
 
It should be noted that 160 additional streaming conveyors and textured 16 processors, as well as other major architectural changes resulted in a marked complicated RV770 compared with RV670. The number of transistors has grown from 666 million to more than 800 million However, despite improvements in the nucleus, increase the frequency and use the same 55 - nm tehprotsessa, engineers from companies TSMC and AMD are able to maintain power RV770 at an acceptable level. High Card Radeon HD 4870 with 1 GB GDDR5 should consume no more than 150 Watts. Younger models Radeon HD 4850 and GDDR5 memory GDDR3 requires about 110 Watts. By the way, the same level of TDP Radeon HD 4850 graphics cards with different types of video shows that the new chips GDDR5 markedly increased in frequency with equal with GDDR3 consumption.

We also know that the RV770 is a bit larger than what was previously rumored, more in the area of ~280-300mm2, which should perhaps convince the still lingering skeptics that RV770 indeed has 800 shader processors.

After that FXvideocards posted the texture fillrate of Radeon HD 4850 we can calculate that the RV770 probably has 40 texture memory units, rather than 32.

We also know that the RV770 is a bit larger than what was previously rumored, more in the area of ~280-300mm2, which should perhaps convince the still lingering skeptics that RV770 indeed has 800 shader processors.

After that FXvideocards posted the texture fillrate of Radeon HD 4850 we can calculate that the RV770 probably has 40 texture memory units, rather than 32.