I have an Acer Aspire 4339-2618. It's a decent laptop, however, it could use more processing power. So, I'm thinking of upgrading the CPU from the stock Celeron P4600 (Socket G1). I have two possible upgrades: 1. i5 560m. 2. i7 640M. Both CPU's are socket compatible with my laptop, so can I go ahead and install the processor? Basically, I'm asking is there any upgrade limitations that I should be aware of? Acer website did not provide any information regarding this topic.