what is the difference between dual gpu and just gpu?

In dual gpu, there are many programming concepts applied, because since you have 2 processors then there are two possibilities at least, one is each processor handles one independent task, the other is, both processor handle the task but they divide that task between the two.
This is, is like in my program I tell to one processor you draw the cube, and to other I say you draw the sphere, so this means the programming language used must have that ability to distribute the tasks
The other way my program does not takes care about which processor does the task, it doesn't even may know there are two processor, but the graphics card knows, so it decides how to distribute the task between the two processors so the task is ended faster.

properly the two are great as you mentioned, yet once you are able to have adequate money that 20 money then flow with the 1075T and HD 6770. The 0.2GHz won't do lots of a distinction, you are able to continuously overclock* 0.2GHz it fairly is amazingly fairly elementary and secure. the main objective would be with the GPU, the HD6770 will final longer than the HD6670. So choose for the 1075T determination. observe. * in case you get the Six center CPU do no longer OC it, you have gotten incredibly some equipment stability problems led to by the quicker-enhance. because of the fact of this the quicker-enhance is desperate to function in a pre set clock speeds. in spite of the certainty that it is trouble-free to over seem, purely disable the quicker-enhance from the BIOS menu.

A GPU is a Graphics Processing Unit, it's the same as the Intel or AMG chip that runs your computer, dual means 2, so 2 GPU's are better than one, as in the load on the graphics card can be split up, processed, then put into your display.

Hope it helps