Yeah, i think it's max shared video memory is just tad below 2GB.
You should be able to change it through BIOS. Or by using software that you should get with mobo, i think. Isn't there some sort of application from amd to control various settings. Or it's in the drivers settings
I've looked in all the typical places. Nothing in the Bios on the Asus board, CCC, or even AMD overdrive. I will check the mobo cd again, perhaps a utility I have missed. I have also done a ton of google searches and all the results are reviews or benchmarks comparing different speeds of memory. The search continues.
Well I fiqured it out and want to post it so some one will find this usefull
First off my motherboard is Biostar A85w and CPU:A10 5800k
Now i did it as "butremor" said , in the bios it is
In the bios find North Bridge section > then find GFX or GPU configuration etc., > select IGPU(not the PCiE.... something) > set Buffer... to Forced/Manual and Boom you can now increase upto a max of 2gb
and i did not did any before and after testing so i dont know if it changes/increases performance but i am hoping that it does