What is the graphics card? You may need to clean the heat sink and fan on it. A case fan at the front to provide air intake at the HDDs would relieve the HD 1 temp problem. Would HD1 be sitting on top of HD2 by any chance? If your case is capable you could separate them more by moving them apart.
GPU temp is high then and I would recommend looking at the graphics card to see if there is fluff/dirt blocking it.
HD1 and HD2 are the hard disks which store your data and the operating system. They are not the RAM which is about 1.5" x 6" and very thin. The HDs are about 5" x 3.5" x 1" and are usually situated at the front of the case about half way up.