P
P
Can anyon confirm that the PC-DL will **recognize** 4 gigabytes of RAM?
P
Paul
"P" said:
The PC-DL uses the 875 Northbridge, which is the same one as a P4C800
board. The manual says it takes up to 4GB of memory, so it will.
There are two places you can check for posts about this. abxzone.com
will have more posts about P4C800/P4P800 boards, while 2cpu.com will
have posts about PC-DL. There is a long thread on 2cpu.com about
PC-DL, so long in fact that I don't plan on reading the whole thing
A word of warning about 1GB DDR SDRAM. There are two kinds, the right
kind and the cheap kind. The cheap kind will be priced around $150
and will have zero technical description of how it is constructed.
It will used "stacked" ram (128Mx4 chips) and will present more than
the normal bus loading to the motherboard.
The proper kind of 1GB modules would consists of (16) 64Mx8 chips
for a non-ECC module, and (18) 64Mx8 chips for an ECC module. You'll
find a wide price range on these modules on sites like crucial.com
and kingston.com. Generally you'll pay more like $300 instead of the
$150 for a stacked module.
If you want to play with the cheap memory, get a money back guarantee
from the vendor, that the memory will work with your board. Test
thoroughly with memtest86 from memtest86.com or memtest86+ from
memtest.org. If the vendor won't guarantee it, then try elsewhere.
No need to get scammed for "restocking fees".
Even when you do all of this, you'll lose 0.5GB of the memory due to
the need for the address space of the chipset to include some
space to get at PCI devices. In Windows, you'll see your 4GB of memory
listed as 3.5GB or so. (Actually, there is a note to that effect
in the manual - it says you'll see 3.8GB, so post back with whatever
number you get.)
Someone also posted once here, about OS and application issues with
large ram. Something about 3GB or more needing some extension to get
at the memory. Sorry I don't remember the three letter acronym for
this "feature" (I think this was a Windows issue).
HTH,
Paul
D
daytripper
The PC-DL uses the 875 Northbridge, which is the same one as a P4C800
board. The manual says it takes up to 4GB of memory, so it will.
There are two places you can check for posts about this. abxzone.com
will have more posts about P4C800/P4P800 boards, while 2cpu.com will
have posts about PC-DL. There is a long thread on 2cpu.com about
PC-DL, so long in fact that I don't plan on reading the whole thing
A word of warning about 1GB DDR SDRAM. There are two kinds, the right
kind and the cheap kind. The cheap kind will be priced around $150
and will have zero technical description of how it is constructed.
It will used "stacked" ram (128Mx4 chips) and will present more than
the normal bus loading to the motherboard.
The proper kind of 1GB modules would consists of (16) 64Mx8 chips
for a non-ECC module, and (18) 64Mx8 chips for an ECC module. You'll
find a wide price range on these modules on sites like crucial.com
and kingston.com. Generally you'll pay more like $300 instead of the
$150 for a stacked module.
If you want to play with the cheap memory, get a money back guarantee
from the vendor, that the memory will work with your board. Test
thoroughly with memtest86 from memtest86.com or memtest86+ from
memtest.org. If the vendor won't guarantee it, then try elsewhere.
No need to get scammed for "restocking fees".
Even when you do all of this, you'll lose 0.5GB of the memory due to
the need for the address space of the chipset to include some
space to get at PCI devices. In Windows, you'll see your 4GB of memory
listed as 3.5GB or so. (Actually, there is a note to that effect
in the manual - it says you'll see 3.8GB, so post back with whatever
number you get.)
Someone also posted once here, about OS and application issues with
large ram. Something about 3GB or more needing some extension to get
at the memory. Sorry I don't remember the three letter acronym for
this "feature" (I think this was a Windows issue).
PAE (for "Physical Addressing Extensions")
http://support.microsoft.com/default.aspx?scid=kb;en-us;268363
/daytripper
P
Paul
Someone's got a good memory
The beginning of this article mentions that some Windows OS have a
3GB address space for application use:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dngenlib/html/awewindata.asp
"The Microsoft Windows NT operating system has always provided
applications with a flat 32-bit virtual address space that
describes 4 gigabytes (GB) of virtual memory. The address space
is usually split so that 2 GB of address space is directly
accessible to the application, and the other 2 GB is only
accessible to the Windows 2000 executive software. With Windows
NT Server 4.0, Enterprise Edition, and Windows 2000 Advanced
Server, 32-bit x86-based systems can provide applications with
a 3 GB flat virtual address space, with the kernel and executive
using only 1 GB."
Maybe more searching in the KB will dig up the situation for other
Windows OSes.
Paul