Windows 7 4.00GB RAM (3.25GB Usable)

[M.F.D.K]

I installed Windows 7 build 7048 64bit, I was just wondering is it correct that it shows 3.25GB usable...? :huh:

[REM2000]

might be a limitation of either your BIOS or motherboard chipset.

I have the same problem on a computer which is setup with Windows 2008 x64, the motherboard has the limitation and my manufacturer (gigabyte) of updating the BIOS.

[+Chsoriano Subscriber²]

I'm assuming it's a BIOS setting that you need to adjust.

[DigitalE]

Perhaps some of your RAM is being shared with an integrated GPU?

[Chris123NT]

Do you have a intel 945 chipset?

If so the chipset itself is only able to do 32-bit memory addressing so there's nothing you can do, except buy a new mobo.

[M.F.D.K]

I have Nvidia 7300GT 512MB, so no sharing there, i don't have an Intel Chipset. I suppose its to do with the bios, its just my testing machine so its not that important but i was curious to know if that's got to be a problem, it shows fine on vista 64.

I think its a cheap motherboard, bought it a while ago, I've tried doodling around with overclocking before and it was a no go, so i guess it is the bios limitation.

Edited March 4, 2009 by M.F.D.K

[nautiqueskier]

Windows Vista SP1 reports ram installed in the system, NOT ram actually available.

Windows Vista SP0 reported ram usable.

Windows 7 reports both ram installed and ram usable.

[XerXis]

You are using a 32 bit OS. Which means at the most you can address 4 gigabyte of memory. 2^32

However as the main ram isn't the only memory in your computer you have to substract the videomemory and other IO memory from your main memory, which apparently leaves you with 3.25 gb of USABLE memory.

That's it, nothing wrong with your hardware, nothing wrong with windows, pure mathematics.

Use windows 7 64 bit and you can use all your memory. A CPU just sees all your memory (RAM, GPU memory, network controller memory, IO devices) as one big block of memory, in the case of a 32 bit system this block has a maximum size of 2^32 bits which is more or less 4 gigabyte.

[M.F.D.K]

Well cheers anyway pals. :cool:

[NEVER85]

You are using a 32 bit OS. Which means at the most you can address 4 gigabyte of memory. 2^32

However as the main ram isn't the only memory in your computer you have to substract the videomemory and other IO memory from your main memory, which apparently leaves you with 3.25 gb of USABLE memory.

That's it, nothing wrong with your hardware, nothing wrong with windows, pure mathematics.

Use windows 7 64 bit and you can use all your memory

No he's not, check what he posted. Clearly says "64-bit operating system".

[M.F.D.K]

You are using a 32 bit OS. Which means at the most you can address 4 gigabyte of memory. 2^32

However as the main ram isn't the only memory in your computer you have to substract the videomemory and other IO memory from your main memory, which apparently leaves you with 3.25 gb of USABLE memory.

That's it, nothing wrong with your hardware, nothing wrong with windows, pure mathematics.

Use windows 7 64 bit and you can use all your memory

Mate, i think you didn't read my post...? It is 64bit that I'm using.

[XerXis]

No he's not, check what he posted. Clearly says "64-bit operating system".

hmmm, looked over it, my bad :blush: . In that case ome 32 bit driver probably or indeed bios limitation of 4 gigabyte?

[Guest xiphi]

You are using a 32 bit OS. Which means at the most you can address 4 gigabyte of memory. 2^32

However as the main ram isn't the only memory in your computer you have to substract the videomemory and other IO memory from your main memory, which apparently leaves you with 3.25 gb of USABLE memory.

That's it, nothing wrong with your hardware, nothing wrong with windows, pure mathematics.

Use windows 7 64 bit and you can use all your memory

Did you even look at the image provided?

[M.F.D.K]

hmmm, looked over it, my bad :blush: . In that case ome 32 bit driver probably or indeed bios limitation of 4 gigabyte?

Not even sure if its the bios, I just checked it, and the bios is actually reading as something 4096MB. As i said in my previous post, i remember trying to fiddle around with overclocking and the motherboard is so limited that it doesn't allow one bit of overclocking, whether it would be GPU. CPU or RAM.

[nautiqueskier]

What model of computer do you have? (or if you built it, what type of motherboard) and I'll try and look into it.

I'm getting curious about this :D No Core 2 Quad architecture should be based on a 32-bit chipset far as I know.

[RadishTM Veteran]

See if there is an option for "Memory Remapping" under the BIOS, it should be enabled for 64-bit OS'es but disabled for 32-bit OS'es.

Radish?

[noroom]

Since this will probably affect other people in the near future (with RAM being so cheap nowadays), it would be very nice if you if you could try to fix it and post the fix, MFDK.

[M.F.D.K]

What model of computer do you have? (or if you built it, what type of motherboard) and I'll try and look into it.

I'm getting curious about this :D No Core 2 Quad architecture should be based on a 32-bit chipset far as I know.

Its my own build for testing purpose only.

[REM2000]

have you updated your BIOS to the latest version from the manufacturers web site?

[M.F.D.K]

Since this will probably affect other people in the near future (with RAM being so cheap nowadays), it would be very nice if you if you could try to fix it and post the fix, MFDK.

Yeah will do that.

have you updated your BIOS to the latest version from the manufacturers web site?

Yeah that has been done.

See if there is an option for "Memory Remapping" under the BIOS, it should be enabled for 64-bit OS'es but disabled for 32-bit OS'es.

Radish?

I'm going to have a look at it right now.

[jjrambo]

Check BIOS

[nautiqueskier]

Okay just looking at the product specifications for this board, is your Integrated Video card (regardless of whether you are using it or not) actually disabled in the BIOS?

[M.F.D.K]

I just checked the bios, there isn't such a feature as "Memory Remapping" or anything that has to do with 64-bit.

Okay just looking at the product specifications for this board, is your Integrated Video card (regardless of whether you are using it or not) actually disabled in the BIOS?

Its automatically disabled when I connect my PCI/e. I have to go now but i will report back about this seee if i find a solution.

[ShortFuse]

Same thing happened to me.

https://www.neowin.net/forum/index.php?showtopic=742164

[[xan]]

You have to check with your manufacturer website to see the full specification, but from what I know about other P4M900 motherboards the P4M900 chipset supports maximum 4GB of memory (meaning it's a 32bit chipset).