Theoretical Question on DDR3 2133/1866/1600/1333/1066

Discussion in 'General Hardware' started by XeoNoX, Nov 16, 2011.

  1. XeoNoX

    XeoNoX Member

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    GPU:
    Nvidia GTX 550 Ti
    My board supports DDR3 2133/1866/1600/1333/1066. I have a 2500K. I see all these people buying CAS 9 at 1.5v. i notice most people buy 1600 (PC12800) cuz its most common in most current systems. However i have noticed DDR3 2133 (PC3 17000) prices dropping pretty close to the 1600 (PC12800).

    Qustion 1: Now OC question is i notice most people tinkering with CAS and the volts to achive higher speeds (in OCing). Lets say someone buys 1600 (PC12800) CAS9 1.5v and they bump the ram to 2133 CAS 11 @ 1.65v. Would u guys agree that it was better off buying a stick of 2133 CAS 9 (PC3 17000) @ 1.5v at same price???

    Question 2: using the same scenario above, my THEORY is that wouldnt it it be possible to underclock the 2133 CAS 9 (PC3 17000) @1.5v RAM down to 1600 and achieve tighter times as lets just say CAS 8 timings?

    Question 3: In buying 2133 CAS 9 (PC3 17000) 1.5v rated ram on a system that would normally run 1600 (PC12800), wouldn't this give me more ROOM for getting a better OC of my CPU??
     
  2. Hemectu

    Hemectu Member Guru

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    1. maybe, if it worked, but you'd be risking warranty as many companies don't allow voltage changes - clock / timing changes are usually ok.

    2. yes you can underclock, and maybe.

    3. Yes, main reason for having higher frequency RAM like this as it allows an easier time overclocking - the RAM is more forgiving with its' settings.
     
  3. alanm

    alanm Ancient Guru

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    1- Yes, if same price or close to it.

    2- Yes, you can underclock the ram for better timings, but timings no longer have as big an effect on performance with newer gen Intel CPUs. The extra mhz at looser timings would give you a bigger performance boost and would be preferable.

    3- RAM speeds are basically irrelevant to a high OC with newer gen Intels. You can OC it with (proper cooling) to 5ghz just by upping the multi, 50 x 100mhz base clock without touching the RAM.

    i.e., meaning 2133mhz RAM is no more capable of achieving a high OC than 1333mhz RAM.
     
    Last edited: Nov 16, 2011
  4. Pill Monster

    Pill Monster Banned

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    1. Yes

    2. Yes, but it would be a waste of money. Timings are not that important with high speed ram, so you'd be better to by good quality 1333mhz ram and overclock it to 1600mhz.

    3. No, memory speed is independent to CPU speed with new intels. AMD has been that way for years tho - ever since the Athlon 64.

    The only exception to this is if overclocking via the fsb method due to locked CPU multi.
     
    Last edited: Nov 16, 2011

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