I'm not sure how this changes anything about the original post. The reason for those figures is all based on how things like BIOS handles shadowing, higher memory registers, PCI-E segments (for the 2.5G) etc.
The 3.5G can -show- but it's because of the way the memory controller works there.. which would make me think it's far more likely you saw that on either a server board or using an AMD chip, which has the memory controller onboard. Some good explanation here: http://www.codinghorror.com/blog/2007/03/dude-wheres-my-4-gigabytes-of-ram.html -----Original message----- From: Bryan Seitz se...@bsd-unix.net Date: Sat, 01 May 2010 06:28:26 -0700 To: hardware@hardwaregroup.com Subject: Re: [H] Win7 Ent 32-bit vs 64-bit? > Well no, I've seen systems with 4G of memory show: > > 2.5G > 2.8G > 3.5G > > with /PAE > > :) > > On Sat, May 01, 2010 at 12:30:54AM -0700, maccrawj wrote: > > Not a bug, that's the Microsoft artificial memory map limit on 32bit OS to > > (ostensibly) prevent driver issues caused by brain dead drivers writing to > > 64bit > > addresses as if they were 32bit which is also why x64 is so draconian about > > signed > > drivers! In other words despite PAE MS prevents working outside 32bit/4GB > > memory > > space on32bit OS. This was the subject of much discussion a few months ago > > here and > > someone posted a link to the conspiracy guy who "outed" M$' secret agenda, > > LOL. > > > > Now assuming x64 hardware, switch to a x64 OS (caveat "The BIOS must > > support the > > memory remapping feature") to get 4GB+ addressable w/ device memory mapped > > above that. > > > > http://support.microsoft.com/kb/929605 > > > > On 4/30/2010 3:35 PM, Bryan Seitz wrote: > > > Yeah I've seen that bug too, even with /PAE etc still doesn't fix it. > > > You should upgrade to Win7-64 :) > > > > > > On Fri, Apr 30, 2010 at 06:32:30PM -0400, Jason Carson wrote: > > >> I have 6 GB of RAM and a GeForce 295 with 1.7 GB of memory but am running > > >> WinXP 32 bit and my system only shows that I have 2.49 GB of RAM. > > >> > > >>> Well, it does sort of sound like that. I have Win 7 ultimate with 6GB > > >>> RAM. > > >>> When I right-click on My Computer and select properties, it says I have > > >>> 6.0GB. On my work machine (4GB RAM) with XP and 2 graphic cards, it > > >>> says > > >>> I > > >>> have about 2.89GB RAM. > > >>> > > -- > > Bryan G. Seitz
