Hey if you want to overclock your cpu a little and cannot due to a crappy OEM bios, there is a way to overclock your cpu and bring some new life into it if your interested.
This link is for a 800Mhz FSB cpu (like yours) and changes it to a 1066MHz FSB cpu. So it would change your speed from 1.6Ghz to 2.13Ghz and it should be perfectly stable since its considered a small OC for that chip. Link
If you want to read more search “e2140 BSEL”