4GB DDR2 on WinXP 32bit - question - Page 2

Nodens

Indeed. Exactly like that

FISKER_Q

Windows XP can fine deal with up to 4GB memory, however that includes all memory.

This means your video card and whatever will go towards that limit.

Before SP1 though you could deal with a lot more memory, but since it might cause problem with programs it was removed again, so now you need a 64-bit version of windows to use more than 4GB.

Jito463

Umm, no. Video card RAM has NOTHING to do with system RAM. And SP1 made no changes in the amount of RAM Windows could handle, it's a 32-bit limitation. Please don't post if all you're going to do is spread crap.

FISKER_Q

Quote:

Originally Posted by Jito463

Umm, no. Video card RAM has NOTHING to do with system RAM. And SP1 made no changes in the amount of RAM Windows could handle, it's a 32-bit limitation. Please don't post if all you're going to do is spread crap.

It isn't. Video Memory has to be addressed just as normal memory has to, as well as many other kinds of memory that needs to be addressed within windows.

With a normal 32-address space you can only address 4GB memory, and that's all kinds of memory.

Before SP1 or SP2(I don't remember) you could address "more than 4GB" by using a PAE driver, unfortunately some software couldn't handle it, and even the software that could handle it would maximum be able to use 4GB of memory, regardless of how much memory you had.

If you want to read more about the subject there is:

http://www.codinghorror.com/blog/archives/000811.html

FISKER_Q

Oh and btw, in regards to MedicD's number, this is likely the scenario:

768 MB from the video adapter.
512 MB from the motherboard. (What it's used for i don't know, but most motherboards these days map 512MB ram, which if hitting the 4GB barrier makes the RAM accessible, lower)

I myself have 3,25GB memory free out of 4GB with a 256MB 7800 and, again the same 512MB allocated to the motherboard.

Jito463

Since you apparently don't have a clue what you're talking about, and you're completely unwilling to listen, I'm not going to bother responding. Good luck in your fantasy land.

FISKER_Q

Quote:

Originally Posted by Jito463

Since you apparently don't have a clue what you're talking about, and you're completely unwilling to listen, I'm not going to bother responding. Good luck in your fantasy land.

Sure, i'm unwilling to listen, and so is Microsoft + assorted specialists apparently, besides the only thing you said to me was "that i shouldn't spread crap", which i did listen to.

So if i'm dreaming, then i guess i'll wake up tonight when i go to bed.

Novecento

@Fisker: lol

lmgava

Quote:

Originally Posted by FISKER_Q

512 MB from the motherboard. (What it's used for i don't know, but most motherboards these days map 512MB ram, which if hitting the 4GB barrier makes the RAM accessible, lower)

Hi Fisker, there is something about that here.

http://blogs.msdn.com/oldnewthing/ar...14/699521.aspx

The motherboard assigned the ROMs and the hardware devices to the physical address space between 3.5GB and 4GB (occupying 0.5GB of address space). When you start plugging in your memory chips, then, they are assigned physical addresses starting at the bottom, and then skip over the address space that has already been assigned to the hardware and ROM, then resume.

On this imaginary system, then, the 0.5GB of address space used for hardware and ROMs causes that much memory to get shoved upwards, and it ends up above the 4GB boundary.

obvious

Quote:

Originally Posted by Jito463

Umm, no. Video card RAM has NOTHING to do with system RAM. And SP1 made no changes in the amount of RAM Windows could handle, it's a 32-bit limitation. Please don't post if all you're going to do is spread crap.

You're completely wrong Jito463. 32bit windows of course has the 4GB limit. VGA (along with a whole bunch of other stuff) is addressed within this limit as you can see if you view "resources by connection" in device manager. This will reduce available memory unless it's hoisted above 4GB on a 64bit system.