Precision T5500 does not supported memory configuration

Question

I purchased from an local supplayer a refurbished Precision T5500.  Single CPU (QuadCore Intel Xeon X5570) with 8 GB (4x2GB) of ECC registered Ram, 1066MHz. I upgraded memory with 4GB (2x2GB) and i populated all dimm slots, because in this way the  dimm is populated correctly. When i start the computer, in the morning, my machine runs about 2-3 minutes and after that freezes. I restart the machine and run without any trouble all day. If i remove 4 GB of Ram, from any slots, my machine starts and runs without problem. This fact occurs even if all drives are off, or if i run from a live cd. I run every test that i found, including Ram extended test-8hours and everything is ok, without errors. The 2 memory of Ram that i upgraded are identical with the rest. Please help!

RoHe · Answer

Do you know if 12 GB RAM (8 GB old+4 GB new) is a supported memory configuration?

Unfortunately, specs in the manual don't list supported RAM configs so that doesn't help...

Do you have the latest version of BIOS, A16?

camoflage2116 · Answer

check out the following link -     ajkwa.wordpress.com/2012/03/28/dell-workstation-t5500-memory-configuration  it has a chart detailing the layout and which DIMM slots should be used.

adrind · Answer

Yes, i have the latest version of bios (A16).

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