Recognizing memory

I'm sure they are plugged in fully and they are both the same kind of memory. Like I said they both worked properly in my old motherboard. Also when I plug them both into the same channel it recognizes them both, but since they are supposed to be in seperate channels it just says "dual ddr disabled" when booting. How do I adjust the memory timing settings in the bios?

said that you tried all possible combinations and none worked. Now you say single channel works.

Are you sure that your mobo doesn't have to have dual channel enabled in the BIOS?? Or is it possible that the CPU doesn't support Dual Channel??

What model mobo and what CPU are you using????

When i plugged them into the same channel It recognized them both but It said "dual ddr disabled" (because they have to be in seperate channels). What I just did was left only one stick in and it only recognized 256 mb so it's reading them both as 256 mb ram per stick. But they are both 512. Any suggestions?

single channel mode [sockets] How much memory did it report there????

When one stick was installed it only recognized 256 (yet it is a stick of 512). with both installed it recognized 512.

single channel slots, what did Device manager report??????

almost forgot. The cpu does support ddr. I have a gigabyte K8 mobo and an athlon 64 3200 cpu.

The standard socket 754 CPU's do NOT support Dual Channel. Dual Channel and DDR are two entirely different things. The MCH in the standard socket 754 CPU's only supports single channel, but the FX version socket 754s support Dual Channel BUT require registered DDR. The socket 939 versions of all the CPU's support Dual Channel and DO NOT require registered memory for the FX versions. A big leap.

In the AMD 64 bit CPU's the MCH [memory controller hub] is located in the CPU, thus the mobo does not determine it, the socket type, in effect, does. In the Intel sytems it is in what was normally called the Northbridge, except that now Intel calls the northbridge the MCH, the Southbridge the IOCH.

It is a socket 939

enabled as "By SPD" ??? Or have you possibly tried some overclocking. Of course, overclocking should not cause reading the incorrect amount, just make it run flakily.

I guess we need to know how certain you are that the memory sticks really are 512 MB EACH???

I'm absolutely certain that they are both 512 because they worked on my last motherboard. In system info as well as while booting it says only 512 installed. However while I was looking through the troubleshooting on XP It pulled up a seperate system info that said 1 gig installed. Yet still, on a ram saving utility I installed it says only 512 is installed also. I don't know what's going on. I'm fairly fluent when it comes to computers but this just blows my mind.

research on the part numbers of the chips, and the stick if there is one.

What RAM saving utility? Those programs are nothing but smoke and mirrors. Win XP handles memory better than those programs could even think of.. Many installed them in Win 9X systems where they were also useless, some actually freed up memory milliseconds before Win 9X did it normally, big deal..

Where in XP is it repoting 1GB???

What shows in Device Manager? What shows on the intial boot screen???

"because that they worked on my last motherboard" nothing about the size, just that they worked as memory. I hate to imply that your heads memory may be faulty, not the sticks of RAM. LOL

If you have a RAM saving utility loaded on an XP system. I would recco uninstalling it immediately and cleaning the registry.

The initial boot screen is showing only 256 with one "stick" of the 512 installed and 512 with both installed. In my last motherboard it showed a full gig with them both installed. device manager is also showing only 512 as well. it said i had 1 gig installed when i went to start menu-help support-then i typed in "physical memory". Then one of the options to the left side of the screen said to view computer info. then it gathers the computer info. and then it showed 1 gig. But nowhere else does it say that. Even after that, everywhere else it still says only 512 with both sticks installed.

run it from a floppy on one stick at a time???

http://www.memtest86.com/

can you please e-mail that to me. I'm in a military barracks and I have no internet access to my computer. Only the downstairs computers. And i have to pay to use them. But if you e-mail it to me. I can get to it. and copy onto a floppy for free. jallenusn@hotmail.com

to delete your post so that your email email address won't show to the world. You can email me to my profile any time.

You can ask them via a modalert.

are stationed. Toni Hackler's son is in the Navy stationed in San Diego, serving on the Cleveland. Heading for Iraq in July.

Need you to know that we appreciate all of you guys.