I have a Macbook Pro (Early 2008) running on Mountain Lion with a Samsung SSD. Just a few days ago i've noticed significant lag when switching desktops or using any intensive video program and generally the whole desktop experience feels really "heavy".
I run the AHT just today and i've got this error "4vdc/1/40000003" which is allegedly a problem with my video card and also after checking the GPU temparature, it's constantly on 78 celcius.
What should I do? Is it definitely an issue with the Graphics Card or The hard drive?