ram for vista

repo485 · 12-20-2007, 03:35 AM

If i purchase a 64 bit operating system, will it recognize under 4 GB of RAM or is the minimum 4?

oscaryu1 · 12-20-2007, 03:36 AM

32Bit OS - 3.25GB Max

64Bit OS - 128GB Max

repo485 · 12-20-2007, 03:42 AM

But if I purchase the 64 bit operating system can i use less than 4 gb of ram?

oscaryu1 · 12-20-2007, 03:54 AM

Yes... You can use 1MB for all it cares. It's just coded to utilize more than 3.25GB of memory...

repo485 · 12-20-2007, 03:55 AM

ok thank you

[-0MEGA-] · 12-20-2007, 03:56 AM

Quote:

Originally Posted by repo485

But if I purchase the 64 bit operating system can i use less than 4 gb of ram?

Yes.

nyhk · 12-20-2007, 12:54 PM

Quote:

Originally Posted by oscaryu1

32Bit OS - 3.25GB Max

64Bit OS - 128GB Max

It should be

32Bit OS - 4GB
64Bit OS - 128GB

Or

32Bit OS - 4GB minus MMIO
64Bit OS - 128GB minus MMIO

oscaryu1 · 12-20-2007, 02:58 PM

MMIO?

3.25GB is the MAXIMUM for ALL 32bit OSes. Wanna make a thread about it? Cause I didn't make this up myself

tyttebøvs · 12-20-2007, 03:03 PM

MMIO stands for Memory Mapped I/O. The "other" hardware in the pc which takes up addresses. In 32-bit, without PAE, there are 2^32 addresses which can point to 4GB of whatever

tyttebøvs · 12-20-2007, 03:19 PM

I mentioned PAE, this is a feature of the 32-bit processor which allows the OS to make use of the entire address bus, 2^36 = 64G

12-20-2007, 03:35 AM	#1 (permalink)
repo485 Bronze Member Join Date: Dec 2007 Location: Reed City, MI Age: 15 Posts: 49	ram for vista If i purchase a 64 bit operating system, will it recognize under 4 GB of RAM or is the minimum 4?

12-20-2007, 03:36 AM	#2 (permalink)
oscaryu1 VIP Member Join Date: Apr 2007 Location: Houston, Texas Age: 13 Posts: 9,836	32Bit OS - 3.25GB Max 64Bit OS - 128GB Max __________________ Core 2 Duo E2140 1.6GHz @ 3.04GHz GA-P31-DS3L pqi Turbo CL4 DDR2-800 2GB Sapphire HD3850 256MB Sony Writemaster DVD Burner EIDE Seagate Barracuda 80GB 7200.9 8MB SATII

12-20-2007, 03:54 AM	#4 (permalink)
oscaryu1 VIP Member Join Date: Apr 2007 Location: Houston, Texas Age: 13 Posts: 9,836	Yes... You can use 1MB for all it cares. It's just coded to utilize more than 3.25GB of memory... __________________ Core 2 Duo E2140 1.6GHz @ 3.04GHz GA-P31-DS3L pqi Turbo CL4 DDR2-800 2GB Sapphire HD3850 256MB Sony Writemaster DVD Burner EIDE Seagate Barracuda 80GB 7200.9 8MB SATII

12-20-2007, 02:58 PM	#8 (permalink)
oscaryu1 VIP Member Join Date: Apr 2007 Location: Houston, Texas Age: 13 Posts: 9,836	MMIO? 3.25GB is the MAXIMUM for ALL 32bit OSes. Wanna make a thread about it? Cause I didn't make this up myself __________________ Core 2 Duo E2140 1.6GHz @ 3.04GHz GA-P31-DS3L pqi Turbo CL4 DDR2-800 2GB Sapphire HD3850 256MB Sony Writemaster DVD Burner EIDE Seagate Barracuda 80GB 7200.9 8MB SATII

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12-20-2007, 03:42 AM	#3 (permalink)
repo485 Bronze Member Join Date: Dec 2007 Location: Reed City, MI Age: 15 Posts: 49	But if I purchase the 64 bit operating system can i use less than 4 gb of ram?

12-20-2007, 03:55 AM	#5 (permalink)
repo485 Bronze Member Join Date: Dec 2007 Location: Reed City, MI Age: 15 Posts: 49	ok thank you

12-20-2007, 03:03 PM	#9 (permalink)
tyttebøvs Silver Member Join Date: Jun 2007 Posts: 220	MMIO stands for Memory Mapped I/O. The "other" hardware in the pc which takes up addresses. In 32-bit, without PAE, there are 2^32 addresses which can point to 4GB of whatever

12-20-2007, 03:19 PM	#10 (permalink)
tyttebøvs Silver Member Join Date: Jun 2007 Posts: 220	I mentioned PAE, this is a feature of the 32-bit processor which allows the OS to make use of the entire address bus, 2^36 = 64G

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