With the specification of these memory modules should have worked flawlessly in my Acer Aspire One netbook. But he did not unfortunately. Wanted to expand the slot from 1 GB to 2 GB, which at the Aspire will be trouble. Despite all efforts to start the netbook and to somehow get into the BIOS (F2, according some Internet forums also Power plus press Del. - The screen remained black unfortunately it stirred nothing.. Seems as if this RAM do not comply with JEDEC standards. Conclusion: a lot of trouble, time wasted, return. Pity!