Toshiba Satellite L650 Maintenance Manual page 106

3 Diagnostic Programs
This test item is to check whether the memory could be correctly accessed
with randomized memory address and a series of incremental data.
Subtest 10 Data Bus Test
This test item is to check whether the data bus works normally.
Subtest 11 Bus Noise Test
This test item is to check whether the bus noise works normally.
Subtest 12 Memory Speed Test
This test item is to check the data-transferring rate for the cache memory and the
system memory.
Satellite/Satellite Pro L650/L655 Maintenance Manual
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3.6 Memory Test