my dell Otiplex sff 780 E7500 facing upgrade ram problem. i had upgrade ram to (1x4gb) pc3-10600(1333mhz) when i plugin to slot only listen beep sound and error code show 1 and 3...it is not supported ? any one can give me advice?
Thank and Regards,
Looks like the memory you installed is not compatible with the OptiPlex SFF 780.
Best to buy from www.crucial.com that certifies their RAM to be compatible:
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