Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

On a i7-720QM or i7-820QM mobile processors, can each core access all of the available RAM (i.e. 8 GB out of 8 GB). I've heard that on certain desktop motherboards this can cause problems, but I can't find a source.

share|improve this question

Each core can access all the memory. I'm not aware of any desktop/laptop/server that any system has that limitation.

Perhaps you are thinking of multi-socket Athlon systems where the RAM is connected to each socket, but even then each core could see all the RAM, some was just slower to access (that's called NUMA if you are interested)

Or maybe you're thinking of the 4GB limitation for 32 bit Windows XP/Vista/7? You will need a 64bit version of Windows to access all that RAM.

share|improve this answer
I was not thinking of the 4 GB limitation for 32 bit systems. What I heard was that certain motherboards couldn't make all of the RAM available to all CPU cores (in 16+ GB systems). – JcMaco Dec 3 '09 at 4:29

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .