Can I have 4 HDDs in my gaming pc

Solution
Assuming you have enough ports on your motherboard you can have as many hard drives as you want. Although, what's the point in the lower capacity ones? They're likely IDE and if they are, won't work with modern motherboards out of the box.
Assuming you have enough ports on your motherboard you can have as many hard drives as you want. Although, what's the point in the lower capacity ones? They're likely IDE and if they are, won't work with modern motherboards out of the box.
 
Solution


Like a RAID setup? That would be a very bad idea. I wouldn't even bother with those extra drives. They're likely old and slow, not to mention it's only an extra 90GB.