New speculations about the AMD 790G
According to the latest rumors from the Internet, the next generation of IGP chipsets from AMD, i.e. those with an integrated graphics core, will not appear until late March. The successor to the 690G chipset should also support DirectX 10.
According to Fudzilla, the successor to the 690G chipset ( ComputerBase article ) will not be released until March See the light of day in 2008. Up until now, January was often traded as the release date . In Warsaw at the 'Benchmarkfest' for the presentation of the Spider platform , AMD employees had already made a few very short statements on the 790G (code name: RS780/RS790). On the one hand, it became known that the 790G chipset will support the “still” current DirectX 10 standard. On the other hand, it was announced that the basis of the necessary graphics core would be based on the HD-2000 series and that “you should be surprised”.
We will be happy to play some numbers at this point. The Northbridge's predecessor 690G (code name: RS690) consisted of the RD580 in 110 nm technology with a Die size of around 6x6.3 mm and an area of 39 mm² at around 22 million Transistors. On the other hand, the graphics core called RV410, also manufactured using the 110 nm process, accommodates around 120 million transistors in an area of around 13x12 mm, corresponding to around 156 mm². The marriage of the two brought to light only a very small die of about 7x7 mm, i.e. 49 mm² with an unfortunately unknown number of transistors.
Since both the '7-Series' of AMD chipsets and the RV610 graphics core in the 65 nm Technology, a wedding is probably the first to come. A 790X northbridge chip that we measured had dimensions ofabout 4x9 mm, i.e. about 36 mm². With around 180 million transistors, the RV610 has a die area of around 7.5x10.5 mm, i.e. around 82 mm². Now big AMD magic comes into play and reduces a number of 'unimportant' transistors in the RV610 in one go. What remains, according to our irrelevant estimate, for the 790G chipset is an unfortunately unknown number of transistors distributed over an area of around 50 mm².
The subject of energy consumption ( TDP ) should not be left unmentioned stay. With the current IGP chipset 690G, the same increased from around seven watts for the RD580 to around 14 watts for the 690G. So the ComputerBase editor speculates with an improved manufacturing process and higher performance again roughly twice that and thus assumes a TDP of around 20 watts.
Just like our calculations, which are currently more or less out of thin air will probably only show next year, when the 790G actually sees the light of day.