Patent ID: 6351827
Filing Date: 2002-02-26
Classification: G01R,G11C,H05K

Abstract:
A test system for margin-testing memory modules comprising:a motherboard, the motherboard being a main board for a computer using memory modules as a memory, the motherboard containing a processor for executing a test program that writes and reads memory; a test adaptor board, mounted to the motherboard, the test adaptor board having a test socket for connecting memory modules for testing by the motherboard, the test adaptor board for electrically connecting a memory module connected to the test socket to the motherboard attached to the test adaptor board, the motherboard using the memory module inserted into the test socket as a portion of the memory of the motherboard; and a voltage margin circuit, coupled between a power-supply and a power-supply input to the test socket, for adjusting a power-supply voltage applied to the memory module inserted into the test socket to a value that differs from the power-supply voltage on the motherboard by a voltage margin; wherein the test program executing on the motherboard margin tests the memory module receiving a power-supply voltage that differs from the motherboard power-supply voltage by the voltage margin, whereby margin testing of the memory module is performed without altering the power-supply voltage on the motherboard.