Is this RAM compatible?

[Emtiph]

At the moment I have this ram installed on my system. I was lookin to add another gig of this ram. They're both exactly the same as far as I can see, however, look at their Module Configuration's. The memory I already have is 128x64 and the RAM I am looking to add is 64x64. Will it matter that these two things differ? Will the RAM still work/be compatible?

 

[chookman]

This just indicates that each memory chip is 128mb instead of your original 64mb... this is required to make the capacity larger... in this case 512mb sticks into 1gb sticks.