Slix36

just got my pc back from technicial support at computer supermarket.com they replaced my motherboard and Hard Drive and as soon as i got it back i wanted to get back into my gaming... i had a few crashes with cod4 and was quite worried about my pc, as i had no problem running it before i sent the pc back for repairs... so, naturally i check the windows experience index to see if everything is ok... well, the graphics card was where it always was so it couldn't have been that... but whats that? the ram has decreased by a value of 1.1 (from 5.9 to 4.8). surely the 4gb ram i had should have still been the same speed? there's been no change of those parts have there?

i've noticed that it seems to run a little slower than it used to back before repairs to... do you think they may have switched the ram with some less effective ram?

thanks