Ok so i have done Ram memory benchmark in aida64, I have buyed new 2x4 DDR3 kingston hyper x 1866, well i have problem when they are solo in mobo i cant run in bios but mine pc works fine ( i have some restarts dont know why i have done prime and aida64 for aorund 10 mins no restarts but when i surf on the Tom's hardware ) or youtube generaly internet my pc just restarts with BSOD ( windows 10 ) updated all drivers etc.. Well but when i put mine old 2x2 DDR3 Kingston Hpyer x 1600mhz Mine pc works just fine no restarts and i can enter bios normaly, So i mostly play games and i dont know wich is faster ? this is first test with 12gb ram 2x2 old and 2x4 new.... Pc is stable, http://postimg.org/image/gak0kjy8j/ . And this is with only new ram ( cant enter bios and pc is unstable ) http://postimg.org/image/8oon5ozm1/. So i just need to know wich is better for gaming ? or is there anything to solve problem with 2x4 to be stable and enter bios?