One question....How can i calculate theoretical max mem in mhz speed using it's speed in ns ? For example if the mem is 3.3 ns. Is the formula like this ? 1024/3.3*2 ? PS: 2 comes from double data (random access memory)

yea, where do you see how fast your memory is? on my card right? ... well, i wont go opening my PC for that - is there any other way? probably not - i'm i right? cos although the cards are from the same company they can have different memory speed ... or not?

The gods of math say that you can divide your memory clock speed by one thousand and turn your result into a fraction of 1/x... Essentially a reverse of the timing to clock speed formula.