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. > > Bobby > > -----Original Message----- > From: hardware-boun...@hardwaregroup.com > [mailto:hardware-boun...@hardwaregroup.com] On Behalf Of Bino Gopal > Sent: Friday, April 30, 2010 4:49 PM > To: hardware@hardwaregroup.com > Subject: Re: [H] Win7 Ent 32-bit vs 64-bit? > > > But from the MS article: > > > > Note When the physical RAM that is installed on a computer equals the > address space that is supported by the chipset, the total system memory > that > is available to the operating system is always less than the physical RAM > that is installed. For example, consider a computer that has an Intel 975X > chipset that supports 8 GB of address space. If you install 8 GB of RAM, > the > system memory that is available to the operating system will be reduced by > the PCI configuration requirements. In this scenario, PCI configuration > requirements reduce the memory that is available to the operating system > by > an amount that is between approximately 200 MB and approximately 1 GB. The > reduction depends on the configuration. > > > > So doesn't that imply that based on the fact that I only have 4GB, I'll > still be short some memory, unlike what some others said? Or to put it > another way, like Gary said, what will the devices map into since they > can't > map to thin air (and apparently they still need to map). > > > And to put a further point on it, since the video card is a MMIO > (memory-mapped I/O) device, I assume it'll take memory away from the max > 4GB > too. So the moral of the story is that sure I can upgrade to 64-bit Win7, > but if I don't put more than 4GB of memory in the system, I should end up > with exactly the same amount of memory as with 32-bit Win7 right?! > > > > Now, apps running faster is a whole 'nother reason and definitely worth > doing it for that! ;) > > > BINO > > > >> From: bh...@sc.rr.com >> To: hardware@hardwaregroup.com >> Date: Thu, 29 Apr 2010 22:32:12 -0400 >> Subject: Re: [H] Win7 Ent 32-bit vs 64-bit? >> >> It maps into the address space of whatever the 64-bit address space is >> (8 >> terabytes or something like that). When you have a 32-bit OS, the >> address >> space is only 4GB, the system maps in the hardware memory (BIOS, >> graphics >> card RAM, etc.) space from the top of the address space down. That is >> why >> you get between about 3-3.5GB of actual RAM when you have 4GB RAM on a >> 32-bit system. I know I'm not explaining this well, so take a look here: >> >> > http://www.codinghorror.com/blog/2007/03/dude-wheres-my-4-gigabytes-of-ram.h >> tml >> and >> http://support.microsoft.com/kb/929605 >> >> Bobby >> >> >> >> -----Original Message----- >> From: hardware-boun...@hardwaregroup.com >> [mailto:hardware-boun...@hardwaregroup.com] On Behalf Of Gary >> VanderMolen >> Sent: Thursday, April 29, 2010 9:09 PM >> To: hardware@hardwaregroup.com >> Subject: Re: [H] Win7 Ent 32-bit vs 64-bit? >> >> So what will they map into instead? As far as I know, the video has to >> map >> into RAM, >> regardless if the OS is 32-bit or 64-bit. >> >> Gary VanderMolen, Microsoft MVP (Mail) >> >> >> -----Original Message----- >> From: Bobby Heid >> >> >> IIRC, the BIOS and video RAM will not have to map into the 4GB address > space >> (in 64-bit). He will have the whole address space for RAM. >> >> >> > > > >
