[all variants] x1270 belongs to which chipset?

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http://ubuntuforums.org – Here in this source - http://wiki.x.org/wiki/radeon It says - R100/R200 (Radeon 7000 – Radeon 9250) and R300/R400/R500 (Radeon 9500 – Radeon X1950) class chips: and R600/R700 class chips (Radeon HD 2300 – Radeon HD 4890): Which means that R300/R400/R500 has the graphs chips Radeon 9500 to Radeon X1950 and R600/R700 has chips Radeon HD 2300 – Radeon HD 4890 I have RS690 chipset which must belong to R600/R700 category and has x1270 card...which is strictly against what that page states. It also states that R300/R400/R500 contains all chips till x1950 which is also wrong. Now the official wiki page about AMD GPU - http://en.wikipedia.org/wiki/Compari...ocessing_Units Confirms that RS690 has x1200 graphs chip which is supposed to be related to x1270 (but the drivers don't work) We also have a separate page for the 690 series chipsets - http://en.wikipedia.org/wiki/AMD_690_chipset_series Which confirms that RS690M has x1270 graphs chip. Now...I've realized that no drivers except the opensource radeon drivers work; I wanna know if my 3-d is stable in accordance to the developers or not... cause I really don't know which category my chip belong to following all this. I even have a feeling that R600 is very different from RS690; and I think the developers do not know about this...or do they? (Hardware)