4GB of RAM and 32bit Vista

[-0MEGA-] · 01-25-2008, 03:31 AM

Quote:

Originally Posted by nyhk

Of course it is true. Why else would they say it in various articles?

Before SP2 they supported physical addresses above 4G. They revoked that support due to problems drivers and devices not being able to function properly

You could never use more then 4GB of RAM on a 32 bit OS, even before SP2 for XP. It is a limitation of the hardware and software itself, not just Microsoft's choice to disallow over 4GB of RAM from their OS's. They offer both XP Pro and Vista in 64 bit versions, which can support up to 128GB of RAM (except Vista Home)

nyhk · 01-25-2008, 03:35 AM

The x86 architecture offers both PAE and PSE. Microsoft goes with PAE. PAE is normal in both xp and vista because of the DEP support. So going beyond 4G is no problem. How do you think they can support 128GB in their 32-bit datacenter edition? Linux can do the same

nyhk · 01-25-2008, 04:06 AM

If you check the specs on AMD64, they support a 52-bit physical address space in PAE mode, in a 32-bit OS

nyhk · 01-25-2008, 05:29 AM

They talk a bit about the driver issue in this kb:

http://support.microsoft.com/kb/888137

SirKenin · 01-25-2008, 05:30 AM

It is in fact everything to do with drivers. Nyhk is right.

Cleric7x9 · 01-25-2008, 02:15 PM

lol, it is in fact NOTHING to do with drivers; its simple math. 32 bit OS running on binary simply means you can have 2^32 possible physical memory addresses. \

2^32=4294967296 (4GB)

check out the 4th sentence: http://en.wikipedia.org/wiki/32-bit

just google it if you still dont believe me

nyhk · 01-25-2008, 02:21 PM

Quote:

Originally Posted by Cleric7x9

lol, it is in fact NOTHING to do with drivers; its simple math. 32 bit OS running on binary simply means you can have 2^32 possible physical memory addresses. \

2^32=4294967296 (4GB)

check out the 4th sentence: http://en.wikipedia.org/wiki/32-bit

just google it if you still dont believe me

I've said which features of x86 that makes it possible. I even linked to a kb that tells you. So why don't you use google yourself?

Kornowski · 01-25-2008, 02:25 PM

What's this talk about the service pack and 4GB of RAM?

BluePlum · 01-25-2008, 02:45 PM

well Whats the differnce between 32 bit and 64 bit?

Jabes · 01-25-2008, 03:03 PM

Quote:

Originally Posted by BluePlum

well Whats the differnce between 32 bit and 64 bit?

it doesn't support over 4 gigs of ram

01-25-2008, 02:15 PM	#16 (permalink)
Cleric7x9 Diamond Member Join Date: Jun 2007 Location: Palm Beach, FL Age: 23 Posts: 1,710	lol, it is in fact NOTHING to do with drivers; its simple math. 32 bit OS running on binary simply means you can have 2^32 possible physical memory addresses. \ 2^32=4294967296 (4GB) check out the 4th sentence: http://en.wikipedia.org/wiki/32-bit just google it if you still dont believe me __________________ CPU \|\| e8400 RAM \|\| 2GB corsair xms2 pc6400 800mhz HDD \|\| 2x WD Raptor 150GB 2x WD 500GB MBO \|\| EVGA 680i SE GPU \|\| Evga 8800GT Superclocked w/ Accelero PSU \|\| Silverstone 750 watt Case\|\| Antec p182

01-25-2008, 02:25 PM	#18 (permalink)
Kornowski VIP - Graphics Guru Join Date: Jul 2006 Location: Liverpool, UK Age: 18 Posts: 12,068	What's this talk about the service pack and 4GB of RAM? __________________ Intel Core 2 Duo E6300 @ 2.8GHz Gigabyte GA-965P-S3 - Rev 3.3 4GB Crucial Ballistix @ 800MHz PNY 8800GTS G92 @ 800/2000/1000 Corsair HX520W Windows Vista Home Premium Seagate Barracuda 500GB 7200.11 SATA II Tuniq Tower LED OCZ XTC RAM Cooler Antec 900 (Modded) 3DMark06: 11,500 Winner of Photo Tournament: People, Jewelry & Dead Space Member of COD4 [CF] Clan: [CF] Kornowski

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01-25-2008, 03:35 AM	#12 (permalink)
nyhk Silver Member Join Date: Aug 2007 Posts: 152	The x86 architecture offers both PAE and PSE. Microsoft goes with PAE. PAE is normal in both xp and vista because of the DEP support. So going beyond 4G is no problem. How do you think they can support 128GB in their 32-bit datacenter edition? Linux can do the same

01-25-2008, 04:06 AM	#13 (permalink)
nyhk Silver Member Join Date: Aug 2007 Posts: 152	If you check the specs on AMD64, they support a 52-bit physical address space in PAE mode, in a 32-bit OS

01-25-2008, 05:29 AM	#14 (permalink)
nyhk Silver Member Join Date: Aug 2007 Posts: 152	They talk a bit about the driver issue in this kb: http://support.microsoft.com/kb/888137

01-25-2008, 05:30 AM	#15 (permalink)
SirKenin banned Join Date: Aug 2006 Posts: 4,711	It is in fact everything to do with drivers. Nyhk is right.

01-25-2008, 02:45 PM	#19 (permalink)
BluePlum banned Join Date: Nov 2007 Age: 14 Posts: 1,481	well Whats the differnce between 32 bit and 64 bit?