MSI-8340 cd writer speed problem



I have just got an MSI cd writer 8340 - yet i am having a problem with the speed - as it is not burning 40X cd with 40X but only with 32X also i have a cd rewritable 10X speed and it is only allowing me to burn at 8X

I used different cd writing software and still had the same thing - i used nero and clone cd

I have firmware 100d - should i update

Does anyone has the same problem?

Please help me

Also on the msi product archive there is no MSI-8340 writer there is an ms-8340A is that the same thing