Last week I built my brother a computer. It runs fine, other than boot and other operations that rely heavily on the HDD. I ran Crystaldiskmark on it, and it showed the read at about 30 mb/s and write at 50 mb/s, extremely slow for any modern drive. I've already tried switching around sata ports to no success. The motherboard is a Gigabyte GA-78LMT-USB3 paired with an FX 4100 and 8GB of DDR3 1333 RAM. I'd like to figure out the cause of this, and all the possible solutions. Thanks.