Hi, I have 2 of these laptops. They're great, except for the very cheap plastic that breaks easily. Replacing/Upgrading the HDD is a nightmare (if you decide to do so). 🙄😶 The maximum CPU that you can put into this laptop is an Intel T9300/T9500. I'm currently running a T8300 in one machine & a T7500 in another. 😎 Maximum RAM is 2x 2 GB DDR2 800 MHz. 4 GB in total ergo. Best Regards,