4gb only showing as 3.25 ?

theendisgone · 08-31-07, 01:04 PM

Hi, i have just installed 4gb of ram to my pc in bios its showing up as the full 4gb but in windows vista its only showing up as 3.25, anybody any ideas why this would be ? ( the graphics card has its on dedicated memory so cant be that)

Many thanks

Mustanley · 08-31-07, 01:36 PM

Vista 32bit version only support a max of 3.25GB. You need the 64bit version to use 4 or more GB of system memory.

I can't tell by your screenshot but I'm assuming you are running the 32bit version, correct?

Eldonko · 08-31-07, 01:40 PM

If you have Vista 32bit you only get 3.25, if you have 64bit, enable memory remapping feature in BIOS to get all 4gb.

theendisgone · 08-31-07, 01:46 PM

well that explains it, how come 32 bit only supports 3.25 ?

Scott9027 · 08-31-07, 01:50 PM

That's all the memory it can address, it's a limitation of the 32-bit interface.

One Bull · 08-31-07, 01:52 PM

Yep, I fyou want the full 4 gig you will need a 64 bit version. But it doesn't come cheap so you'll have to ask yourself if you really need the 750mb extra. I know it's wasted now, but you can always upgrade later when the prices are a tad lower

theendisgone · 08-31-07, 01:55 PM

what is the driver support like now for 64bit. I was always told there isnt much support for 64bit

thideras · 08-31-07, 01:55 PM

Guys, he has ultimate, it should have both versions

One Bull · 08-31-07, 01:59 PM

Quote:

Originally Posted by thideras

Guys, he has ultimate, it should have both versions

Erm ok, sorry but I didn't smell that

I'm not on vista either, but how do you know that?

Edit: NVM just looked at the screenshot more closely

Mustanley · 08-31-07, 02:06 PM

64 bit driver support has come a long way since vista was released. It's unlikely that you have any trouble getting all your hardware up and running (unless you are using some old peripherals). browse the windows OS section of the forums if you need reassurance.

inkfx · 08-31-07, 03:28 PM

I would check with all the drivers/software you need and make sure it can do 64-bit before making the switch. For the most part, companies have released 64-bit drivers. Only thing you need to look out for really is software support.

08-31-07, 01:04 PM	Thread Starter #1
theendisgone Member Join Date: May 2002 Location: Uk	4gb only showing as 3.25 ? Hi, i have just installed 4gb of ram to my pc in bios its showing up as the full 4gb but in windows vista its only showing up as 3.25, anybody any ideas why this would be ? ( the graphics card has its on dedicated memory so cant be that) Many thanks Last edited by theendisgone; 08-31-07 at 01:36 PM.
	QUOTE Thanks

08-31-07, 01:36 PM	#2
Mustanley Join Date: May 2003 Location: Asheville, NC (Blue Ridge Mtns)	Vista 32bit version only support a max of 3.25GB. You need the 64bit version to use 4 or more GB of system memory. I can't tell by your screenshot but I'm assuming you are running the 32bit version, correct? __________________ Q9550 on P5Q-Deluxe(460x8.5=3910MHz), 4x2GB GSkill 1066, 750GB WD Black HD, GTX285(702,1512,2592), Blu-ray, Silverstone OP650, Samsung 1080P 50" Plasma + Dell 2408WFP, MX1000 laser mouse, Saitek backlit keyboard, P182, Xigmatek S1283 Black Knight
	QUOTE Thanks

08-31-07, 01:40 PM	#3
Eldonko Revolutionary Mule Join Date: Dec 2004 Location: Calgary, Alberta	If you have Vista 32bit you only get 3.25, if you have 64bit, enable memory remapping feature in BIOS to get all 4gb. __________________ Motherboard Reviewer at Hardware Canucks Team OCX Bench Team Always lurking the motherboard section
	QUOTE Thanks

08-31-07, 01:46 PM	Thread Starter #4
theendisgone Member Join Date: May 2002 Location: Uk	well that explains it, how come 32 bit only supports 3.25 ?
	QUOTE Thanks

08-31-07, 01:50 PM	#5
Scott9027 Member Join Date: Jun 2005 Location: NC	That's all the memory it can address, it's a limitation of the 32-bit interface.
	QUOTE Thanks

4gb only showing as 3.25 ?

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08-31-07, 01:52 PM	#6
One Bull Member Join Date: Mar 2006 Location: Enschede, Holland	Yep, I fyou want the full 4 gig you will need a 64 bit version. But it doesn't come cheap so you'll have to ask yourself if you really need the 750mb extra. I know it's wasted now, but you can always upgrade later when the prices are a tad lower __________________ Xeon 3060 P5K-dlx Asus 8800GTS 640mb 2Gb OCZ pc2 8500 (nvidia sli) Seasonic S12 650W 150Gb raptor 400Gb storage
	QUOTE Thanks

08-31-07, 01:55 PM	Thread Starter #7
theendisgone Member Join Date: May 2002 Location: Uk	what is the driver support like now for 64bit. I was always told there isnt much support for 64bit
	QUOTE Thanks

08-31-07, 01:55 PM	#8
thideras Banned Neckbeard Moderator Premium Member #3 Join Date: May 2006 Location: South Dakota	Guys, he has ultimate, it should have both versions __________________ Desktop: Gigabyte Z77X-UD5H \| 3570k 4.6 GHz \| 32 GB GSkill Ares \| GTX 570 \| 180 GB Intel & 2 TB total \| Arch Linux and Windows 7 Main server: 30 TB raw disk \| 2x Opteron 6134 \| Asus KGPE-D16 \| 128 GB RAM \| IBM M1015 \| CentOS 6.2 VM Server: Dell R710 \| 2x E5645 \| 288 GB RAM \| 8x 300 GB Velociraptor \| Xen Cloud Platform (XCP) "That's not overkill, or a lot. That's just thiderastic." -txus.palacios Current projects: Rackmount Overkill (New) \| 30/45 hard drive server Articles: Rack Mounting 101 \| Dell Perc 5/i Throughput Benchmarks Past projects: Software RAID \| The Dragon Case My Website *Want to talk directly to all* the moderators at once? Call the Mod Hotline!**
	QUOTE Thanks

08-31-07, 02:06 PM	#10
Mustanley Join Date: May 2003 Location: Asheville, NC (Blue Ridge Mtns)	64 bit driver support has come a long way since vista was released. It's unlikely that you have any trouble getting all your hardware up and running (unless you are using some old peripherals). browse the windows OS section of the forums if you need reassurance. __________________ Q9550 on P5Q-Deluxe(460x8.5=3910MHz), 4x2GB GSkill 1066, 750GB WD Black HD, GTX285(702,1512,2592), Blu-ray, Silverstone OP650, Samsung 1080P 50" Plasma + Dell 2408WFP, MX1000 laser mouse, Saitek backlit keyboard, P182, Xigmatek S1283 Black Knight
	QUOTE Thanks

08-31-07, 03:28 PM	#11
inkfx Member Join Date: Oct 2004 Location: San Antonio, Texas	I would check with all the drivers/software you need and make sure it can do 64-bit before making the switch. For the most part, companies have released 64-bit drivers. Only thing you need to look out for really is software support. __________________ \| Dell Studio17 Laptop \| \| T9300 @ 2.5Ghz - ATI 3850 - 3GB RAM - Seagate 320GB 7200rpm - 17" (1920x1200) Glossy widescreen \| Windows 7 64-bit \|
	QUOTE Thanks

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