Sign in with
Sign up | Sign in
Your question

I have 8 gig but only 2.5gig showing, help plz

Last response: in Memory
Share
April 18, 2009 9:46:59 PM

Hi guys,

I put together my computer yesturday, and now when i go under "My Computer" I right click on it and go under properties, it is showing 2.5gig !!!! when I have 4 dimms of 2gig PC800 each Kingston, the ones that are approved for this mobotherboard. I have the 780 SLI. I just reflash the BIOS and still nothing. I am a noob in need of help. Please guys.

Thanks.

More about : gig 5gig showing plz

April 18, 2009 9:54:45 PM

You did not tell us what operating system you were using. I'm using you use a 64-bit OS? If so, you may need to enable memory remapping feature in BIOS.
April 18, 2009 9:58:06 PM

I have XP Pro 32-bit.
Related resources
April 18, 2009 10:00:04 PM

That's why, its 32bit. In order to make use of more than 4gb you need a 64bit OS.
April 18, 2009 10:01:21 PM

Ok, then why is it showing 2.5gig and not 4gig? How can I make it show and use 4 gigs. Thanks for fast reply guys
April 18, 2009 10:02:15 PM

2GB is the usual limit for 32-bit, although with PAE you can extend the memory; but still with limitations. In no instance can a 32-bit application address more than 2GB (unless its compiled in a special way allowing up to 3GB addressing).

Consider a 64-bit OS if you run more than 4GB RAM.
April 18, 2009 10:02:33 PM

And if i can download XP Pro 64-bit can I use the same key as for the 32-bit?
April 18, 2009 10:07:48 PM

XP pro 64 has driver issues.

You need vista 64 or windows 7 64
April 18, 2009 10:08:12 PM

now if i buy a 64-bit should i go for vista ultimate 64 or xp pro 64, main use gaming. Thanks.
April 18, 2009 10:08:52 PM

ok, that answers my question
a b } Memory
April 18, 2009 10:20:33 PM

EVEN WITH A 64 BIT OS YOU WONT SEE ANY IMPROVEMENT WITH IF YOU USE MORE THAN 3-4 GB OF RAM

http://www.tomshardware.com/reviews/memory-module-upgra...


Even the latest systems cant really use more than 3 gig even if they can address it .


PS buying XP 64 bit is crazy . MS dont support it and there isnt that much driver support .

PPS buying vista 64 ultimate is even sillier because its just home premium with the features of vista business added so its a complete waste of money . Buy home premium for gaming and home use
April 18, 2009 10:21:35 PM

Can you tell me what games use 8GB? Especially since like all games are still 32-bit so can only use 2GB maximum....

You might be best off installing a version of Windows 7 64-bit. :p 
a b } Memory
April 18, 2009 10:35:24 PM

sub mesa said:
Can you tell me what games use 8GB? Especially since like all games are still 32-bit so can only use 2GB maximum....

You might be best off installing a version of Windows 7 64-bit. :p 



Good point .

People can see how much RAM a game uses by running the game in a window and having a look at windows task manager . Crysis was never using more than 1 gig of RAM on my computer .

More RAM isnt better ... its just more
April 18, 2009 10:47:38 PM

More RAM would allow the game to store more (like bigger levels/environments). But that wont happen right now since games are only 32-bit and 64-bit games will not become common until amd64 is common, which may even happen after Windows 7. IMO it was a mistake to ship Windows 7 32-bit; it could have been a great moment to go 64-bit only.

But as people at home are still using 32-bit operating systems, there sure aren't going to be many 64-bit capable games out there that can use more than 2GB memory. 1) not many games need so much RAM and 2) too few customers have 64-bit capable OS so it will not be commercially attractive right now.
April 18, 2009 11:34:28 PM

Which, IMO is a shame because Vista64 is beautiful and it works well.
April 18, 2009 11:57:42 PM

They should have never made a 32-bit version after XP, that would have helped. :) 
April 19, 2009 8:37:37 AM

cliffro said:
In order to make use of more than 4gb you need a 64bit OS.


Or a 32bit OS that is not XP or Vista.
April 19, 2009 8:43:24 AM

redatassi said:
Ok, then why is it showing 2.5gig and not 4gig?

Because your video card and other hardware are mapped onto the 4GB.

Quote:
How can I make it show and use 4 gigs.

You cannot.
April 19, 2009 8:46:25 AM

sub mesa said:
2GB is the usual limit for 32-bit


4GB is the usual limit for 32-bit (2^32).
April 19, 2009 8:48:53 AM

I was thinking that no matter OS you use, if it's 32 bit it will only adress max 4gb, because of "the 2^32 thing" ??? :) 
April 19, 2009 9:20:54 AM

As for ultimate or home premium there is very little reason for the average person to pick up ultimate over home premium. However the ultimate verision does come with a very simple disk imaging utility. It not as robust as something like acronis but it is more reliable especially with raid setups. IMO it's worth the extra 60 bucks alone.

Also dream scene (allows you to set video as a desktop background) and bitlocker (data encryption) are included. Just food for thought. Virtual PC 2007 is available as a free download for ultimate, xp pro and I think business users. great way to use those xp apps that just won't work in vista.
a b } Memory
April 19, 2009 2:12:12 PM

The best thing the OP can do at this point is simply return 4 gig of the memory, or sell it to someone else. Right now, there is no reason to run out and buy Vista.
It is going to be obsolete in a few months with the official release of 7.
Don't waste money on buying Vista. It is simply not worth it. Just keep your XP pro for now.
XP will not use all the memory if you have 4 gig installed, but that is okay. It will still make use of all it can. The extra doesn't hurt anything. And later, when you do decide to upgrade the OS to 7, you are set.
But to that end, you still don't need 8 gig. That is simply overkill, and you'll never need that much.
April 19, 2009 3:16:07 PM

I'd suggest downloading a recent build of Windows 7 x64.

sub mesa your data is a bit off, as subAnimal pointed out. 32-bit Windows can address exactly 4GB of memory space. There is a certain amount of this addressable space reserved for the BIOS and OS, as well as every byte of memory belonging to attached devices (including but not limited to video cards). So what you end up with is a usable/addressable space of approximately 3-3.5GB, depending on the configuration of the OS and attached devices.
April 19, 2009 7:27:16 PM

1817233,23,95014 said:
sub mesa your data is a bit off, as subAnimal pointed out. 32-bit Windows can address exactly 4GB of memory space.
But applications cannot. They are limited to 2GiB. They can address up to 3GiB if they are specially compiled with /LARGEADDRESSAWARE and /3GB flags, but very few applications do this. Games like World of Warcraft don't, in any case. So their actual memory space is limited to 2GiB, not 4GiB.
[/quote]
April 20, 2009 6:14:23 AM

FlorinR said:
I was thinking that no matter OS you use, if it's 32 bit it will only adress max 4gb, because of "the 2^32 thing" ??? :) 


Most 32 bit OSes can address > 4GB of RAM using PAE.
April 20, 2009 6:15:40 AM

sub mesa said:
1817233,23,95014 said:
sub mesa your data is a bit off, as subAnimal pointed out. 32-bit Windows can address exactly 4GB of memory space.
But applications cannot. They are limited to 2GiB. They can address up to 3GiB if they are specially compiled with /LARGEADDRESSAWARE and /3GB flags, but very few applications do this. Games like World of Warcraft don't, in any case. So their actual memory space is limited to 2GiB, not 4GiB.
[/quote]
said:


The OP was not asking about applications.
April 20, 2009 11:07:19 AM

Still, he may have thought that 8GB available in 32-bit also meant that applications could actually use that amount of space; which is not true. With apps limited to 2GB each, an 8GB 32-bit system might not make much sense, unless its a server with many processes so the memory can be divided nicely.

If you require applications to be able to use more than 2GB (or 3GB with the compile tweak) you need a 64-bit OS and a 64-bit application.
April 25, 2009 5:29:09 PM

Right, even though with more memory(not saying 8gb) a game may only use so much, but what about the other programs running in the background and the OS? they need RAM too.

My experience has been, with 2gb, Alt-Tabbing out of a high memory usage game is a pain but still works albeit slowly. With 4gb its much much quicker.
!