From Michal Tulacek:
"Goldmemory" is optimized self-bootable memory testing tools supporting latest components (x86-compatible architecture). Special testing algorithms are used, which are very effective. These algorithms simulate very complicated operations connected with intensive use of the whole memory subsystem. Separate modifications of algorithms mentioned are able to detect errors which appear as result of wrong function of hardware. The Goldmemory can not identify exactly which hardware (or settings) is defective. It only indicates whether your memory subsystem is working correctly.