I wouldn't pay a big premium for ram. Pull one of the ram sticks and see what brand it is. Dell can be as picky as some asus boards. I would only use 1.5v ram unless your old ram is 1.65v. Most Intel boards use 1.35-1.5v ram now. Also check your motherboard bios for ram adjustments. You may not be able to adjust your ram above 1.5v.