6GB DDR3 Ram Installed BUT only 2.75 USABLE?!

isogamer

Junior Member

Okay so i have a Quad core x6850 Intel CPU, EVGA 280GTX GPU CARD.

Now i installed window 7 x86 bit version ULTIMATE. And i have 6GB DDR3 RAM INSTALLED INTO MY geforce Nforce 790i motherboard. Now the problem is that in Windows 7 it shows "Installed Memory: 6.00GB (2.75 GB Useable)". But in Bios it shows me that 6gigs in installed.

Now does that mean it is WIN 7 that is just reading my DDR3 RAM WRONG? But i am still getting the full performance for all of my 6GB DDR 3 RAM? Since my bios is reading all of the 6GB RAM?

Also i tried doing what other forums indiated i should be doing like type config and check mark or uncheck mark MAX MEMORY. Tried doing that, but noting happened.

Now the only thats left and i am having confusion with is, some people are saying i should Enable Memory remapping in bios? I have a nforce 790i motherboard, and i can't find that exactly in my bios mode. Is there any other way to fix this problem? Please HELP! THANKS!

AfterDawn Advertisement

cee43ja1

Visit user's personal page Send private message to this user

AfterDawn Addict

you need x64 to break the 4gig barrier.

so format the OS drive and install win7 ultimate x64

ps2: v7 scph-39001 - independence exploit - hdloader 0.8c - maxtor 300gb hdd
(+[__]%) psp slim ta-085v1: 6.60 PRO B10
wii (powered by bootmii/priiloader): 4.1u - cIOSX_rev21 (base IOS57) - configurable usb loader v67c - wd scorpio black 7200rpm 320gig w/ ams venus ds2 enclosure

got a whole lot more to list . . .

Xplorer4

Send private message to this user

Senior Member 4 product reviews

Why are you running 6 GB on a C2Q? C2Qs are designed for 4GB or 8 GB of RAM. This could potentially cause problems.

This message has been edited since its posting. Latest edit was made on 09 Dec 2009 @ 18:15

isogamer

Send private message to this user

Junior Member

Hi thanks for the reply. But what is C2Q?

isogamer

Send private message to this user

Junior Member

never mind my last messge, you mean QUADCORE INTEL CPU you are talking about right? What should that matter though? Cause i know people who has more powerfull CPU then mine like a CORE I7 and they r able to run up 12GB OF RAM.

SO far my pc is been running fine with no glitches or whatsoever for lil over 2months. My motherboard can handle up to 12gigs of ram from what i read. Is there any way of fixing this situation where my mobo or OS can read all 6GIGS of ram that i have already installed into the system?

isogamer

Send private message to this user

Junior Member

Originally posted by cee43ja1:
you need x64 to break the 4gig barrier.

so format the OS drive and install win7 ultimate x64

IS formatting my OS drive into WIN 7 x64 bit is the only way to fix this problem? I been reading that if i go to bios mode i can ENABLE MEMORY MAPPING? I can do somethign like that?

isogamer

Send private message to this user

Junior Member

Originally posted by cee43ja1:
you need x64 to break the 4gig barrier.

so format the OS drive and install win7 ultimate x64

Also i have a intel quadcore 6850 extreme cpu. I thought x64bits are only ment for AMDs cpu?

k7vc

Visit user's personal page Send private message to this user

Member

x86 is a 32-bit operating system and can only address a maximum of 4GB of memory. (It would make more sense if they called it x32, but the x86 nomenclature hearkens back to the early days of x86 Intel architecture.)

Just because your hardware can support more than 4GB of memory doesn't mean your software can. If you want to utilize more than 4GB of memory, you need a 64-bit operating system simply to address it.

That is why cee43ja1 said "you need x64 to break the 4gig barrier. So format the OS drive and install win7 ultimate x64." He is 100% correct.

Dick

Xplorer4

Send private message to this user

Senior Member 4 product reviews

Originally posted by isogamer:
never mind my last messge, you mean QUADCORE INTEL CPU you are talking about right? What should that matter though? Cause i know people who has more powerfull CPU then mine like a CORE I7 and they r able to run up 12GB OF RAM.

SO far my pc is been running fine with no glitches or whatsoever for lil over 2months. My motherboard can handle up to 12gigs of ram from what i read. Is there any way of fixing this situation where my mobo or OS can read all 6GIGS of ram that i have already installed into the system?

First use the edit button.

Yes C2Q mean Core 2 Quad.

Why does it matter? The core i7 is designed to run tripple channel memorey(3x1GB AKA 3 sticks of 1 GB, 5 GB, 12 GB etc utilizing 3 sticks. The C2Q was designed for Dual Channel(2x4GB is the most common 4x2GB, etc). In other words the ideal configuration for the mobo(motherboard for a Core2Quad, and any other modern CPU aside from a 700 series Core i7) is 2 sticks or 4 sticks in a multiple of 2. Thats not to say you cant run 3 sticks, but it COULD cause problems.

Oh and DDR3 is a waste of money for a C2Q. There able to run DDR3 but it doesnt really offer much performance gain over DDR2.

Originally posted by isogamer:

Originally posted by cee43ja1:
you need x64 to break the 4gig barrier.

so format the OS drive and install win7 ultimate x64

IS formatting my OS drive into WIN 7 x64 bit is the only way to fix this problem? I been reading that if i go to bios mode i can ENABLE MEMORY MAPPING? I can do somethign like that?

Yes it is. Formatting is your only option. The way a 32 bit os is coded it is limited to 4 GB of RAM, but you wont utilize the whole 4 GB. In 99% of cases 4 GB is plenty anyways.

Originally posted by isogamer:

Originally posted by cee43ja1:
you need x64 to break the 4gig barrier.

so format the OS drive and install win7 ultimate x64
Also i have a intel quadcore 6850 extreme cpu. I thought x64bits are only ment for AMDs cpu?

No the Intel CPUs utilize a technology designed by AMD, but the Intel can use 64 bit. I have Win 7 x64 Ultimate running on a Core i7 860 as we speak.

sammorris

Visit user's personal page Send private message to this user

AfterDawn Addict 4 product reviews

I don't remember AMD designing the 64-bit tech used in Intel's chips. As far as I aware they were separate technologies, though I could be mistaken.

To add weight to this, you MUST have a 64-bit OS to use more than c. 3GB of RAM.

Afterdawn Addict // Silent PC enthusiast // PC Build advisor // LANGamer Alias:Ratmanscoop
PC Specs page -- http://my.afterdawn.com/sammorris/blog_entry.cfm/5036
updated 25-May-11

isogamer

Send private message to this user

Junior Member

OKAY so the look of things it seems i have no choice BUT to install WIN 7 x64bit version. Now for sure this should fix my problem? In order to read all of my ram x64bit is the only way right?

Now the thing is i read some other forums i herd that even some users who installed XP x64bit and WIN 7 x64bit tried both.. some users were facing the same problems, where their OS wouldn't read all the RAM . Any idea?

sammorris

Visit user's personal page Send private message to this user

AfterDawn Addict 4 product reviews

There is no reason why a 64-bit OS wouldn't read all your RAM unless your motherboard does not support the full size, which is unlikely. However, rather strangely you have chosen 6GB in a Core 2 system, which are designed to use either 4 or 8GB of RAM, not 6, so I can't guarantee the outcome.

Afterdawn Addict // Silent PC enthusiast // PC Build advisor // LANGamer Alias:Ratmanscoop
PC Specs page -- http://my.afterdawn.com/sammorris/blog_entry.cfm/5036
updated 25-May-11

isogamer

Send private message to this user

Junior Member

Originally posted by sammorris:
There is no reason why a 64-bit OS wouldn't read all your RAM unless your motherboard does not support the full size, which is unlikely. However, rather strangely you have chosen 6GB in a Core 2 system, which are designed to use either 4 or 8GB of RAM, not 6, so I can't guarantee the outcome.

Hi ya thats a good question. So i took one ram out.. one of my 2gig ddr3 ram.. so i was left with 4gigs only.. logged into my WIN 7x32bit version that i am running now.. it show me 4gigs but still 2.75ram only being read.. And i have a Nforce 790i motherboard triple SLI.

cee43ja1

Visit user's personal page Send private message to this user

AfterDawn Addict

we've been saying the same thing, because it will allow you to use more than 4gigs.

wipe your OS drive, and install win7 x64.

ps2: v7 scph-39001 - independence exploit - hdloader 0.8c - maxtor 300gb hdd
(+[__]%) psp slim ta-085v1: 6.60 PRO B10
wii (powered by bootmii/priiloader): 4.1u - cIOSX_rev21 (base IOS57) - configurable usb loader v67c - wd scorpio black 7200rpm 320gig w/ ams venus ds2 enclosure

got a whole lot more to list . . .

isogamer

Send private message to this user

Junior Member

okay will do that now and get back to you with the results. Thank you to everyone for helping me out.

k7vc

Visit user's personal page Send private message to this user

Member

Originally posted by isogamer:
Now the thing is i read some other forums i herd that even some users who installed XP x64bit and WIN 7 x64bit tried both.. some users were facing the same problems, where their OS wouldn't read all the RAM . Any idea?

Don't confuse an OS being able to address >4GB of RAM with an application being able to address >4GB of RAM. There are a lot of 32-bit applications out there that can run on x64 systems, just not access >4GB of memory.

Dick

Xplorer4

Send private message to this user

Senior Member 4 product reviews

Originally posted by sammorris:
I don't remember AMD designing the 64-bit tech used in Intel's chips. As far as I aware they were separate technologies, though I could be mistaken.

Well I stand corrected. Just re-read the article. Intel initiated the 64 bit architecture, AMD improved it, Intel adopted AMDs Architecture(which was Intel to begin with) and that is where we stand today.

For the detailed info
http://en.wikipedia.org/wiki/Intel_64#Intel_64

sammorris

Visit user's personal page Send private message to this user

AfterDawn Addict 4 product reviews

Generally from what I've read, AMD's implementation of 64-bit technology is considered superior. Sadly, the chips no longer have the brute force to back that up.

Afterdawn Addict // Silent PC enthusiast // PC Build advisor // LANGamer Alias:Ratmanscoop
PC Specs page -- http://my.afterdawn.com/sammorris/blog_entry.cfm/5036
updated 25-May-11

6GB DDR3 Ram Installed BUT only 2.75 USABLE?!

Popular products:

Hot forum topics right now:

More information:

For information about advertising on AfterDawn.com, please contact our media sales team.