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I've a motherboard that can accept 8G RAM, But Window only see and use 4G RAM. If I put in my 8G RAM sticks, Will installing a 64bit version of Ubuntu really access most of the 8G's, Or is this a pipe dream?

System Specs:

Intel core 2 Q6600 quad
Intel motherboard DG965WH
4G ram (currently installed)
1TB (2 disks)
Vista x64
ATI Radeon HD5670
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If you already have the 8G sticks, put them in and try a Ubuntu live CD to see if they are recognized... They should be... –  adempewolff May 22 '12 at 2:48

2 Answers 2

You can run more than 4gb on a 32 bit system with PAE, or physical address extensions - which i believe the default 32 bit kernel comes with, but 64 bit would have better performance, and the system itself supports 4x 2gb sticks for 8 gigs. There's no reason why it should not work

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Yes; Ubuntu supports more than 4GB of ram, even on the 32bit version. Microsoft has decided you have to pay extra for a build of windows ( server edition ) that supports more than 4gb of ram on 32 bit, though IIRC, Vista 64 bit should also support 8gb of ram.

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Good answer, but I'm confident this has already been asked somewhere –  hbdgaf May 22 '12 at 6:13
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Microsoft has decided you have to pay extra for a build of windows that supports more than 4gb of windows on 32 bit -> no, this is incorrect. PAE doesn't require another "build" or that you pay extra. Where did you hear this? –  Sathya May 22 '12 at 11:50
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@sathya en.wikipedia.org/wiki/Physical_Address_Extension "Microsoft Windows implements PAE if booted with the appropriate option, but current 32-bit desktop editions enforce the physical address space within 4GB even in PAE mode. According to Geoff Chappell, Microsoft limits 32-bit versions of Windows to 4GB as a matter of its licensing policy," SOURCE: geoffchappell.com/notes/windows/license/memory.htm –  Rinzwind May 22 '12 at 11:54
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@psusi To me your answer is corect and the downvote should not have been given. So upvoted ;) –  Rinzwind May 22 '12 at 11:58
    
@Rinzwind be that as may be, you don't have to pay extra for the 64-bit version. You're licensed to use 64-bit & 32-bit with the same key, albeit not simultaneously. The DV still holds because this is incorrect --> Microsoft has decided you have to pay extra for a build of windows that supports more than 4gb of windows on 32 bit. No you don't have to. Grab the 64-bit edition. –  Sathya May 22 '12 at 12:01

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