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CPU-Z sees RAM but BIOS & Windows don't

by scottbomb / October 17, 2006 8:08 AM PDT

I think I may have posted this in the wrong section earlier today so since I can't delete the other one, I'll put it here.

I have an Abit A-20 mobo. It has 2 memory slots and is capable of a max. of 2 GB RAM. Ever since I built this computer about 2 yrs. ago, it has run with a single memory stick in slot 1 - a 256 MB DDR-SDRAM Corsair PC2700, part # VS256MB333. As you can see, this systems runs a 333 MHz bus with a 166 MHz FSB.

I bought an EXACT COPY of the memory stick, another Corsair PC 2700 part # VS256MB333. Same stick, same size & type, same brand, same EVERYTHING. I put it in slot 2 and the computer doesn't even see it. I swap the sticks. New stick in slot 1 and old stick in slot 2. The computer now sees the new stick in slot 1 but doesn't see the onld stick that's now in slot 2. both BIOS and Windows only see 256MB when they should see 512.

I thought perhaps slot 2 was bad until I ran CPU-Z. This utility shows detailed info. about the CPU and memory. CPU-Z sees 512 MB RAM. For those unfamiliar with CPU-Z, it also reports the contents of each memory slot and they're BOTH reported, stats and all.

So obviously the slot works and so does the new stick. I have software that can see both memory sticks but neither the BIOS nor Windows (XP Pro) can see the second one. This is very puzzling.

Tonight I will flash the BIOS and do an update to see if that "wakes it up". But like I said earlier, this system is only 2 yrs. old so I doubt the BIOS update will help. It's just the latest revision that addresses other issues and the earlier one supported up to 2 GB anyway. Any ideas?

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Not a stellar test. CPUZ read the SPD.
by R. Proffitt Forum moderator / October 17, 2006 8:30 AM PDT

Which doesn't mean the RAM will work, just that the SPD portion did.

Best of luck.


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Looked on Corsair ...doesn't show an Abit A-20 MB ,,,
by VAPCMD / October 17, 2006 11:38 AM PDT

Who's the system mfg, the series and the model #

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I am
by scottbomb / October 19, 2006 2:38 AM PDT

I am the system manufacturer. I built it 1.5 yrs. ago. Abit A-20 is the mobo and Corsair is the ram.

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Incorrect combination or bad slot ..
by billzhills / October 19, 2006 7:05 AM PDT

Cannot find the MB model at Abit so this is by gosh and guess ....

1. If their is more than two memory slots on the MB check the manual for proper memory module combinations.

2. Attempt to boot w/ 1 memory module in slot 2.
This will determine if the slot is bad. (See Bob's post on CPU-z)

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