How does a computer "know" or detect how much RAM is in place

  blueskye 21:41 19 Nov 2011
Locked

Crucial tells me that I have 2x512Mb in place when in fact I have 1Gb and 512Mb. The machine should accept 2x2Gb.

Any ideas why it doesn't "see" the other whole 1Gb (other than the possibility that the RAM itself is faulty?

  Forum Editor 22:23 19 Nov 2011

Try swapping the RAM modules around - put the 1Gb module in the slot that is presently occupied by the 512Mb and vice versa.

  rdave13 22:28 19 Nov 2011

Possibly your ram is running in dual channel mode and you're not getting the full benefit. The crucial auto scanner isn't perfect but near enough. Have a look at your 'system' (don't know what your OS is, and check what it 'sees'. A bit of a miss-match running 1GB and 0.5GB.

  rdave13 22:40 19 Nov 2011

This might shed a better light on dual channel mode, click here

  lotvic 00:41 20 Nov 2011
  rdave13 00:44 20 Nov 2011

lotvic

Thanks. Why do we bother....

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