What memory would you choice if you are going to overclock?

I wanted your input on what memory would be the best choice for the following i5 Haswell build. If you have a better recommendation for around the same price please list it. Thank you for your time.

Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory (Purchased For $89.99)
CL 9

Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory ($78.49 @ Newegg)
CL 8

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (Purchased For $228.49)
Motherboard: Gigabyte GA-Z87X-UD3H ATX LGA1150 Motherboard (Purchased For $138.49)

Video Card: XFX Radeon HD 7950 3GB Video Card (Purchased For $159.00)
Case: NZXT Phantom 410 (White) ATX Mid Tower Case (Purchased For $69.99)
Power Supply: Rosewill Capstone 650W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply (Purchased For $89.99)
4 answers Last reply Best Answer
More about memory choice overclock
  1. Well, the first set performs better if that is what you are asking. Real world applications though, there will be no noticable difference in their performance outside of computer benchmarks.
  2. I am getting conflicting answers in regards to the Haswell and the 1.65v memory. Some say you will not have an issue while others say I should not go over the 1.5v? Anyone use 1.65v in their haswell processors?
  3. I do yes. It will be fine. I have G.SKILL Sniper Series DDR3 SDRAM DDR3 2400 1.65V and it runs perfectly with my haswell (4770k). The memory you picked is RATED to run at 1.65v which means they have tested it and confirmed it runs at that (lifetime warranty).
  4. Best answer
    The 1.5 (+) that Intel talks about is for DRAM running at the spec freq of 1600, I tend to stay at 1.5 sticks up through 1866, from 2133 on up 1.6-1.65 is perfectly fine (and expected as the freqs are higher and it is anticipated using these higher freq sticks you will be running an OC on the CPU, I myself like to keep the DRAM and MC voltage within about 0.60 of each other)
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