Portege M200 has a CPU info table in flash RAM.
If it is not set correctly for the installed processor, the speed will be capped at 598MHz.
You can check Windows system properties for reported speed.See this thread or more info and a solution.
Mine was like it when I bought it refurbished.
Your picture shows the nVidia GPU without a heatsink.
If it's missing that could also cause system slowdown.