Do I need matching pairs for RAM in Mac Pro?

[apattee]

Right now I have 4 x 1gb sticks and I want to add 4 more Gigabytes. Can I add 2 x 2gb? Thanks.

[jessica.]

It depends on which MP you have, Xeon or Nehalem as well as whether it's quad or octo-core. I believe in the octo-core in both you need matching pairs. You should be ok either way with what you want.

[apattee]

It depends on which MP you have. Xeon or Nehalem?

Xeon.

[jessica.]

See my edited post speedy. ;)

[apattee]

Thanks Jessica. So just to make sure, if I have the following setup:

1gb
1gb
1gb
1gb
2gb
2gb

everything will work? According to Crucial, and you, matching pairs is necessary. How would that setup be matching? 2 x 1gb, 2 x 1gb, and 2 x 2gb?

Thanks again.

[-aggie-]

See your manual.

http://manuals.info.apple.com/en/Mac_Pro_Early_2008.pdf

See pgs. 46-47

[apattee]

Thanks guys!