CAS Latency Considerations - Need Your Expertise!

Hi all - Looking to buy some ram for my next in line super gaming rig!

The generic goal here is to have the "best" RAM for gaming.

Aiming for 16GB and hoping to pay under 200$ (should be more than enough I assume).

1. Just got an i7 3770k and read that ivy bridge works best with 1.5V
2. Next up, I heard that overclocking was best on 2x8 vs 4x4 because of less stress on the memory controllers
3. I heard that lower CAS = Better RAM; Quick searches showed me that CAS 7 is some of the fastest available RAM with the above 2 constraints
4. And the "obvious" goal is to have DDR3 1600MHz at least. (More is better I suppose but generally deemed "unnecessary?")

My quest began: Find 1.5V 2x8GB DDR3 1600MHz CAS7 Ram
But then that quest ended abruptly as I couldn't find anything.

I could only find 1.5V 4x4GB CAS7 in the following:
$129.99 - G.SKILL Ripjaws Z Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7Q-16GBZM
$144.99 - CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CML16GX3M4X1600C7
$171.99 - CORSAIR DOMINATOR 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMP16GX3M4X1600C7

Should I just go for the 4x4 GSKILL or should I pursue a 2x8 setup with higher CAS numbers (I can easily find 1.5V CAS10 2x8 buys all over the place).
Is there something else that is more important that I should consider in my priorities for buying RAM here?

Please assist me in my quest!
2 answers Last reply
More about latency considerations expertise
  1. Another note:
    My soon to be CPU is

    CPU: i7 3770k
    GPU: GTX 680 MSI Lightning
    PSU: ULTRA POWER 750 Watt
    MBO: Asrock Extreme 6
    Case: Cooler Master CM690
    RAM: Need to upgrade
    SSD: Samsung 840 Pro 256MB

    I'm hoping to OC my 3770k to the 4.5 area
    Still in process of getting a water cooler (fighting urge to buy a H100 and actually do my own research / leg work)

    The more and more I read about RAM the less and less it seems that it really matters what i get.

    But at the end of the day i'm wanting maximum FPS on Battlefield 3 @ 1900x1080!
  2. There are plenty of 8 GB sticks listed by Asrock as compatible with the Extreme 6.

    Pick the fastest you are willing to pay for, but stick to that list.
    On this platform memory multipliers are separate from cpu multipliers, so you have a lot of leeway.
    Higher capacity ram does have slower latency as will higher clock speed ram.
    The system you build with those listed parts will be fast enough for a 24" monitor without any overclocking.


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