3.25GB / 4GB ram is good enough for most people and most of them don't notice any "SLOW" effect - 8Gb ram won't make things quicker unless you have proper apps which can use all those amount of ram and to use all those 8GB ram just use win7 x64.
Sometime mobos have compatibility issue with certain memory chips and this is the reason why Transcend 4GB ram is not working with your mobo but Hyundai Electronics / Hynix ram is working ... most of the time issues like this can be solved with a bios update easily
Sometime mobos have compatibility issue with certain memory chips and this is the reason why Transcend 4GB ram is not working with your mobo but Hyundai Electronics / Hynix ram is working ... most of the time issues like this can be solved with a bios update easily