The number that you need to keep in mind is the TDP, meaning that the platform you're on is limited by it's cooling potential/package, hence why you're restricted to 35W processors. Even if you did drop in a higher spec'd processor, you'd have to cripple it severely to the point that it's effectively a T series processor to begin with. Only difference in the latter is that you spent resources to come to the same exact place as opposed to merely sticking with a series processor from the get go. Either that or you drop in a higher end processor, cook the innards and then end up with an expensive paperweight.