I just picked up an Acer Aspire notebook from target today for 197.99 and it had the C-50 @1.3ghz, and this little thing is very fast. It only has 2gb ram which i planned to upgrade to 4gb. with that laptop (E-300) it should be just as fast as this c-50 cpu if not faster since it has 4gb ram. if you plan on multitasking then it might slow u down a bit. while installing my antivirus and browsing the web, the cpu did peak up to 80% usage. its perfect for web browsing and netflix which is what i got mine for. c-50 i believe is just better at power saving while e-300 uses a bit more power.