PA6T uses more than 7W at 2ghz, heck it uses more at lower frequencies even. According to pretty much every source online at 2ghz it has a TDP of 25W. I was quite surprised by this actually, as this power consumption/heat disappation has now been somewhat surpassed by often criticised x86 cpus (bulldozer variant Llano, AMD current generation cpu for example is significantly faster and proportionally significantly lower consumption while including an HD 6xxx class gpu ondie).
Include a gpu (even a mobile variant), ram, etc. onboard, and suddenly there's little hope of an accelerator card for a1200 even being possible unless it's towered.
