That i5 is a 35 watt processor; there are i7's which run at the same 35W like the 620m or 640m. I can't tell you whether that laptop (the BIOS) would support the i7 though since I couldn't find a CPU support list on the hp support site (only the model of the included i5). It'd be pretty expensive to get that cpu and some disassembly of the laptop would be required, naturally.