Limits of the RAM for N-Alvorix-RS880-Μatx (HP p6650z)

I just got the p6650z - 4 gigabytes of RAM. It has 4 slots, and there are currently 2 sticks of 2 GB each. If I read the motherboard plug right (, it seems that it can take up to 8 GB of RAM (for the 64-bit operating system) and can handle 4 concerts in each of the slots.

So your stay with 2 chopsticks 2 - gig, I could insert two 2 gig sticks more, or a stick more than 4 gig, but NOT 2 sticks of 4 gig again? I'm not a RAM expert by any means, but I'm just surprised that a mobo could handle 4 gigs of ram in a dwelling, but not in a second slot.

Or am I misunderstood something in this form?

Yes, because:

Your computer uses only memory channel, configured as pairs A and B.  Each pair has 2 banks. Each pair must be matching.  If your motherboard is the N-Alvorix-RS880-formfat (Alvorix) you are limited to 8 GB max. You said two 2GB have been installed. You can add another two 2 GB of the same speed. That would be max on your Board to "N".  I don't see any need to purchase two 4 GB, and draw away the installed pair of two 2 GB modules. I hope it is clear to you, now.

The N-Alvorix-RS880-formfat (Alvorix) MOBO is limited to 8 GB.

H-ALVORIX_HF-RS880-Μatx MOBO is limited to 16 GB.

Tags: HP Desktops

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