i just want to know if there is difference in specification in the versions of xbox(1.0,1.2,1.4,1.5,1.6) i hope u could understand me??

Yup, they are all quite different, that's why they have different version numbers. Some have different power supplies. Some have different hardware on the mobo. Some have different dvd rom drives.

Although, my 1.6 hardly resembles a 1.6 anymore, it is well and truly modded, mostly for looks.

thanks rik for your help but i want to know there is diference in game speed between the xbox versions

Edit: Please don`t start any more threads for this subject. Thanks.

They should all run pretty much the same speedwise, the different versions were for things like making improvements to reliability and for cutting costs.