I have an mid-end video card Zotac GeForce GTX 550 Ti, but my friend explain to use this video card it must have an 2.8 GHz CPU clock speed and 4 GB RAM (DDR2 recommended), he said if I use GTX 550 Ti in Core 2 Duo E4500 2.2 GHz it doesn't balanced otherwise some component was damaged. He's also telling that his friend PCs was broken due mid-end/high-end GPU usages. Is okay I use GTX 550 Ti in 2.2 GHz? I was not understand and confused