Intel Communities: Message List

Re: D875PBZ motherboard 4gb memory issues HELP

webadmin@intel.com — Fri, 02 Oct 2009 02:39:56 GMT

I was thinking specifically of the BIOS firmware revision. The latest version of the BIOS for your board is a few years old, but you might want to check to see if you have that one. Although, the "latest" version might not always be the one that "works right."

Your system runs fine for a while, then begins to exhibit weird symptoms, then crashes, then won't even POST unless you remove some RAM.Are you giving things time to cool down before you try to reboot? Sounds like there could possibly be some overheating going on.

Check the RAM settings in your BIOS screen (F2) and make sure the timings are correct for the sticks that you have.

If it were my machine, I might also try downgrading the BIOS to an earlier version. Bugs get introduced sometimes, and I would imagine that few people run 4GB with XP 32-bit so the issue would go virtually unnoticed in the field.

Re: is dp45sg compatible with ddr2 graphics card LIKE HD 4650 OR 9500GT

webadmin@intel.com — Wed, 30 Sep 2009 23:46:10 GMT

Any of those boards should work with that video card.The kind of memory your motherboard has and the kind of memory your graphics card has do not have to be the same. You can use a DDR2 motherboard with a DDR3 video card and vice/versa.

If you are going to be gaming and you must choose between DDR3 system RAM or a higher-end video card, I would go with the better video card.

Re: D875PBZ motherboard 4gb memory issues HELP

webadmin@intel.com — Wed, 30 Sep 2009 23:31:56 GMT

My first guess would be either heat issues or a faulty BIOS.

When the sound starts getting flaky, take a peek at Task Manager and see how much RAM you are using and the size of the paging file.

If you keep using the computer and it crashes, and it won't reboot to the OS, what *does* it do when you try to reboot?

Re: D875PBZ motherboard 4gb memory issues HELP

webadmin@intel.com — Wed, 30 Sep 2009 23:20:18 GMT

DetailsGuy wrote:

I am unclear whether the 4 GB can actually be achieved with 32-bit Windows XP. I am getting conflicting information about whether you can actually go to 4 GB with 32-bit Windows XP or if you have to settle for 3 GB. From the D875PBZ Desktop Board Product Guide, the board definitely does support up to 4 GB of RAM.

You can indeed install 4 GB of RAM, however you cannot *use* all of it. This is because your hardware (video card, sound, raid, usb controllers, etc) occupies some of the same space as your RAM does.

If you install 4GB, the best you can hope for is to have about 3.5 GB useable RAM, probably less. Unfortunately, there is really nothing you can do about it. The /PAE switch in BOOT.INI won't help you, nor will any other switch. Still, 3 GB is better than 2 GB.

Re: DG45ID bios downgrade

webadmin@intel.com — Wed, 30 Sep 2009 11:38:59 GMT

BIOS revision 0079 for the DG45ID board is available at

http://driverscollection.com/?aid=403540673585dc4bb51e76a431b

I personally used this file to get back to 077. It worked for me.

DG45ID + 9800GT = 2GB RAM lost

webadmin@intel.com — Wed, 30 Sep 2009 11:35:18 GMT

Hi,

I have discovered a problem with my DG45ID. It appears to be a bug in the BIOS introduced with revision 0079 and up. I have enumerated the steps below in order to be as clear as possible with my explanation:

1. Obtain a DG45ID desktop board with BIOS revision 0077

2. Install 4GB (4 x 1GB) Kingston RAM

3. Install a 9800GT video card

4. Install a core-2 quad processor

5. Boot into BIOS screen and observe that 4 GB of RAM is correctly installed

6. Boot into Windows XP 32-bit, go to task manager and observe that approx 3.2 GB of RAM is available (this is correct due to hardware mapping).

7. Update the BIOS to *any* revision above 0077

8. Boot into BIOS screen and observe that 4 GB of RAM is correctly installed

9. Boot into Windows XP 32-bit, go to task manager and observe that now only 2 GB of RAM is available (this is incorrect).

With any BIOS revision above 0077, a 512MB video card shadows 2 gigs of ram. I understand that a 32-bit OS can only address 4 GB of memory and that some of this will be taken up by other system resources. However, two whole GB should not be lost to a 1/2 GB video card. This problem does NOT arise with BIOS 0077.

The only way I could solve this issue was by downgrading the BIOS back to revision 0077. With every other revision, the 2GB was lost.

Any ideas, or is this just an undiscoevered BIOS bug?