I got this to upgrade to replace my new Asus EEE PC 1000h's 1gb chip. There is a very KINGSTON FLASH MEMORY noticeable improvement in the speed of a lot of operations including Firefox and MS Word. A free benchmarking tool bumped the total score from an 80 to 135, making the 1000h as good as a full size Toshiba Satellite laptop running a AMD 6400 dual core! It doesn't seem to significantly affect the the battery life one way or another. This is my second OCZ memory KINGSTON FLASH MEMORY upgrade, the first one worked out great too. I'm very pleased with this purchase!