Partions

Let's say hypothetically i have 2 HDD , one is faster than the other .If i merge them into one Local disk , what happens with the speed of the both ? Im wondering , for example i download something which is 120gb into the merged disk and then i decide to copy it to somewhere else and because of...

I have a Circle 600W PSU. I recently upgraded to a GTX 970, and 8 GB ram. After that, whenever I try to play GTA V, the power in the whole house turns off. My config is: Processor: AMD FX 6300 @ 4GHz RAM: Corsair Vengeance 2x4GB GPU: MSi Armor 2x GTX 970 HDD: WD Caviar Black 1TB Motherboard...