Updated on 25/1/2012 - Finally after 3.5 years, I'd upgraded the CPU to C2D E6420 and it is running fine, paid £28 from ebay.
Asus Nova P20 has no upgrade option as the reseller in Singapore told me. In UK, there is no P20 model but PX24, P244 Black and P22. The initial look inside the box was very complicated but not impossible. It took me 5 hours to reach the RAM, but probably 1 hour if I would to redo again. Most of the UK models comes with 2GB ram, the maximum for the board, but if you do like to upgrade the processor or HDD, it is possible.
My unit comes with 120GB SATA hdd and a low end Intel Core 2 Duo E2160 processor. I was thinking of putting a new 320GB SATA2 HDD and any of the higher processor such as E6550 as I already gone thru the hassle of opening the box. In the end, I only replaced the RAM with a new 2GB Kingston DDR2 PC5300 667Mhz ram into it. Processor and HDD will be my next upgrade, perhaps early next year when the price comes down 20%.
It is now performed way better than before, for my WMP, Teamviewer and some graphic tools. This made it a better HTPC.
First look inside the box














Smithsonian magazine 6th Annual Photo Contest



















