armapker :
Yep it can, I reccomend the Phenom II P960, its a quad core 1.8GHz processor and gets about 70% better performance
http

/www.ebay.com/itm/AMD-Phenom-II-Quad-Core-P960-HMP960SGR42GM-Mobile-CPU-Processor-S1-1-8Ghz-/260896374977?_trksid=p2054897.l4275
Thank you for the tips, really appreciate it.
Yes, I'm also thinking about going four cores as it will definitely gives better performance like you mentioned. However, I use this laptop mainly for image processing: LightRoom & Photoshop. From various sources I learned that these software benefits mainly from higher clock, while not much from adding cores. I'm running P340 @2.2GHz now, and while I'm sure switching to quad core will gives me better multitasking, what I'm really in need of is a boost in clock speed. That said, after a casual search on ebay, I found that there are few 'reasonably priced' Socket S1g4 CPU that could serve as a better alternatives to my existing P340:
- Phenom II Dual-Core Mobile X620 3.1Ghz
- Phenom II Dual-Core Mobile N660 3.0Ghz
- Phenom II Dual-Core Mobile N640 2.9GHz
- Phenom II Dual-Core Mobile N620 2.8GHz
As for the quad cores, unfortunately they are all either the same per-core clock as my existing CPU or slower
- Phenom II Quad-Core Mobile P960 1.8GHz
- Phenom II Quad-Core Mobile N950 2.1Ghz
- Phenom II Quad-Core Mobile N970 2.2GHz > Rather expensive, so probably not an option.
Besides compatibility of the motherboard, I also worried about heat, as those CPU are often with higher TDP. That's why I asked the first question in the first place. The laptop itself is a bit old, but if somehow a little 'tweak' that cost a little could bring a bit of push to the performance, then why not..
