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ram upgrade issue - dell dimension c521

Trying to upgrade mem from two 512 sticks to two 2GB DDR2 PC-2 5300 667 MHz sticks. Previous BIOS info showed the 512s were in dual1 memory channel mode and both sticks in Rank 1. New Bios settings indicate that memory channel mode is now single and both 2GB sticks are Rank 2. Where is this taking me?

Thanks.

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jamietoner

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mscheyde

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Yes I did, System works fine with one stick in slot 1. Both in slots 1 and 2 generates blue screen. I think this particular board has a 1GB per stick 4 GB max limitation. Thanks for getting back.

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Gary Case

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Gary Case

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mscheyde

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I did try 1 & 3 with the same thought in mind (CH A & CH B) however no luck. Putting both in slots 1 & 2 produced 3.37 GB available and eventually brought down the OS. I'm sure this is due to the memory addressing limitations. Currently I'm running with one in slot 1 and I have 1.87Gb in (obviously) single mode. I believe I will take your advice and swap in 4 1Gb sticks.

Otherwise, the 512s in 1 & 2 showed up as dual so I'm thinking the docs are correct.

Thanks for your input.

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Gary Case

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mscheyde

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slots 1, 2 = 5 minutes to BS depending on what you're doing of course. slots 1, 3 = bios sees all the mem but the os doesn't see what's in slot 3. Total mem = 1.87 GB. Thanks again for your input.