My new PC has the following parameters:

 - CPU - Intel Core i5 6600k 
 - DRAM - DDR4-2133 8Gb  
 - MB - Asrock z170 pro4s     
 - SSD Sandisk 128Gb SATA 6Gb/s

And I have Asus HD 7750 video card which is the weakest part. I need a video card better than this with price lower than $250.