RAM upgrades 8GB and 2GB

[Renegademaverick]

Hey all.
Probably a bit of a dumb question. But I am having to upgrade the RAM in my 2009 8-Core Mac Pro. It came with 4 2GB memory sticks. I have a total of 8 slots.

I recently purchased two 8GB sticks. So I was wondering if I could install the 2x8GB and 4×2GB to equal 24GB. Or do they all need to be 8GB.

If so what configuration should I install them in.

Thanks in advance.

 

[flowrider]

Lou

 

[h9826790]

You can mix install 8GB DIMM with 2GB DIMM. However, you CANNOT mix UDIMM with RDIMM. The original 2GB sticks should be UDIMM, and your newly bought stick may be RDIMM.

https://forums.macrumors.com/threads/can-i-mix-memory-size.1903411/#post-21638766

 

[js2704]

I had exactly the same issue and am happily running 4 x 2 and 4 x 8 for 48GB. The mixing advice is of course spot on.

 

[Thessman]

You don't quite add up!

I had exactly the same issue and am happily running 4 x 2 and 4 x 8 for 48GB. The mixing advice is of course spot on.

 

[js2704]

You don't quite add up!

Ah, indeed! 4x4 and 4x8....