Posting the below info for those too lazy to click the above links,
(or in case the above links go down)
The nVidia numbering system
As you all know that there are two major GPU manufacturers: ATI and nVidia. Both have their own numbering systems, but we will start with nVidia first.
A lot of time people asked me this same question: “why dose the GeForce Go 6600 perform better than a Go 7400, when 7400 is a higher number?”; To those of you who know why this is the way it is, you can sit back and grin, but to those users who are confused as to why the Go7400 is slower than the Go6600, I suggest that you keep on reading.
NVidia uses the fallowing format in numbering their GPU’s: (Generation)(Performance)00.
What this means is that the first number in the numbering sequence is the GPU’s Generation number: ex. GeForce 6 Series or GeForce 7 series.
The second number is the performance rating number: ex x200, x300, x400, x600, x800, and x900; where the ‘x’ is the Generation number. So the higher the performance rating number, the faster the GPU is.
So lets look at this example: nVidia GeForce Go 6600 vs. GeForce Go 7400.GeForce Go 6600
: Generation: GeForce 6 series (the first number). Performance: 600 (the second and last numbers). So this is a GeForce 6 series card with the performance rating in the family of 600.Now the 7400
: Generation: GeForce 7 series. Performance: 400.
Because the Go 6600’s performance number is higher, that’s why the 6600 is superior to the 7400.Note
: other factors affect the GPU’s performance too, if you would like a full comparison of GPU’s, I would recommend that you take a look at chazman’s Guide.The ATI numbering system
Like nVidia, ATI have a GPU numbering system too. But it is somewhat different than the nVidia system. AND you must remember that you cannot compare numbers from the two manufacturers for performance rating. Example: the ATI Mobility Radeon 9700 is not superior to the Go 6800 because of the numbering. BECAUSE they are from different companies and their numbering system differs too.
Currently most of the ATI Mobility cards that are selling are the xX00 series and the x1X00 series.
Much like the nVidia series, the ATI series can be confusing to some users too. For example: a user might think that the Mobility Radeon X1400 is superior to the X800 because 1400 is a higher number. Yes, logically the 1400 is a higher number than 800, BUT (like nVidia) there is the numbering sequence that must be taken into consideration.Xx00 vs. x1X00.
The Xx00 series are ATI’s previous generation of PCI-E GPU’s. On the other hand, the x1X00 are the newer generation of GPU.
The System: The first “x” in both generations is a letter representing (I think) the word “Xpress”, so that dose not matter here. The second x (Xx00 x1X00) is the performance number. The ‘1’ in the newer generation is meant to separate the two generations, so if your looking for performance DON’T look at the ‘1’.
For example: Radeon X800 vs. Radeon X1400. if we take the 1 out of the X1400 we are left with 400, which is a lower number than 800, so that makes the X800 a better performer, but since the X800 dose not have a 1 before the 8, it is an older generation GPU, but a better performer than the current generation X1400.Conclusion and a note
So, the GPU numbers are set in a format that makes it easy to determine which generation and performance class the GPU falls in. Higher numbers do not necessarily mean that the GPU is a better performer. To figure out which GPU will perform better, just look at the Second number (in nVidia’s case), to figure out which generation a GPU belongs to just look at the first number (in nVidia’s case). It is quite easy to understand when you get a grip of it, but I understand that this numbering system is hard for some users (it was for me), that’s why I wrote this guide.
Hope you understand it.
Thank you all,
Source link: http://forum.notebookreview.com/showthread.php?t=52468