ATi 4870X2(R700) PCB Debut

[Sampsa]

I have also noticed a lot of people are very skeptical about my tests. I don't claim to be an expert in this case and all these results are based on my own tests with simple tools and methods. I'm not even 100% sure if this issue with 3870 X2 in Crysis and Race Driver: GRID is actually microstuttering, lag or some other problem. I asked AMD about this and hopefully get an answer.

I have to return this sample tomorrow but imho I've deserved couple more from AMD

[Arseface]

I have also noticed a lot of people are very skeptical about my tests. I don't claim to be an expert in this case and all these results are based on my own tests with simple tools and methods. I'm not even 100% sure if this issue with 3870 X2 in Crysis and Race Driver: GRID is actually microstuttering, lag or some other problem. I asked AMD about this and hopefully get an answer.

I have to return this sample tomorrow but imho I've deserved couple more from AMD

Hi

I wrote a little tool which quantifies the degree of microstutter from a given FRAPS benchmark. I don't claim it's foolproof, but it should give a roughly consisent approximation of the degree of MS, which scales does not scale with the absolute value of framerate (a non-dimensional index)

You can grab it at: http://www.ubern00b.net/microstutter.rar

The readme explains how to use it and exactly how the index is calculated. But in short, the index is the average percentage varation away from the stabilised local framerate.

An index of less than 8 ish seems typical for single GPU setups. With multi GPU setups we have seen some values as high as 40, although sometimes they can be of similar magnitude to the single GPU results. I think it may be dependent on the rendering mode which is used.


I'm very interested in microstuttering wrt the 4870x2 also, especially given its closer communication between GPUs via the xfir sideport

[flopper]

I have also noticed a lot of people are very skeptical about my tests. I don't claim to be an expert in this case and all these results are based on my own tests with simple tools and methods.

Never read people´s opinions when you get hardware for testing.
To many are just full of .

Look forward your preview.