Not a bad processor if you're stuck with a 775 socket.
14 June 2011
Summary: For the value this 775 is good.. especially compared to other 775s that are only marginally better but quite a bit more expensive. I had to buy a heat spreader as this one got pretty hot using the standard Intel fan.
Summary: This chip does not replace the stock E2140. Bus speed match. Socket match. Is in Acer's compatibility list, but NOT COMPATIBLE. Upgrading bios didn't work. Intel tech support said they didn't know, ask Acer. Acer said, "Sorry for the inconvenience." Additional commentary unpublishable.