SSD Raid 0 Troubleshooting

I just finished my ssd raid 0 array with a 120gb Samsung 840 evo and a 120gb kingston hyper x 3k. The 4k and the write speeds are slow to me, are they normal? This is my first raid array and I followed the instructions on the motherboard manual to create the array. 



That seems right to me. I have 2 x Crucial 512GB SSDs in software-based RAID0: