i have Corsair vengeance 2x4 and I wanna know if adding 2 more sticks would give me any issues, and most importantly will the frequency split between the 4 sticks (400 MHz each) and will I be sacrificing performance by adding the 2 or should I sell the 2 sticks I have and get 2x8. My specs are i7 3770k, GA-Z77X-D3H,GTX 980ti hybrid, pc power and cooling 950 watt silver. Thanx.