Closed Solved

X79 CPU and 1.65V Memory

Hello,
ASRock recommends G Skill's memory for their X79 MoBos. X79 MoBos only take i7 Sandy Bridge E CPUs. All recommended G Skill memory for 1866 MHz and over is 1.65V. The Intel website says memory shouldn't be any higher than 1.5V. Forums say the same. ASRock have told me not to worry.
I've bought the MoBo, Memory and CPU. Should I worry?
16 answers Last reply Best Answer
More about memory
  1. Hi there, u don't need only G skill.

    How much RAM do u need?
  2. That is if u need 16GB.

    Both kits are quad channels, optimized for the x79.
  3. And @ 1.5V
  4. Memory faster than DDR3-1600 speeds will have an almost unnoticeable effect on overall system speed.

    Just buy DDR3-1600 1.5 volt RAM and do not worry about faster RAM.
  5. i7Baby said:
    Hello,
    ASRock recommends G Skill's memory for their X79 MoBos. X79 MoBos only take i7 Sandy Bridge E CPUs. All recommended G Skill memory for 1866 MHz and over is 1.65V. The Intel website says memory shouldn't be any higher than 1.5V. Forums say the same. ASRock have told me not to worry.
    I've bought the MoBo, Memory and CPU. Should I worry?

    ASRock will list all sorts of different manufacturers and assemblers. 1.65v RAM doesn't concern me nearly as much as the required VCCSA voltage. I've seen 1.50 G.SKILL Ares require 1.25v VCCSA and many 1.65v kits only require 1.10v VCCSA -- the damaging voltage is the VCCSA.

    Any of these X79 kits - http://www.corsair.com/us/memory/intel-memory-upgrades/quad-channel-intel-memory-upgrade-kits.html
  6. Thanks for your replies.
    As I said, I've already got the memory - 1.65V 16GB 2133MHz G Skill Ripjaws - F3-17000CL9Q-16GBZH. ASRock and G Skill say that I'll have no problems. But it looks like Intel say that the memory should be max 1.5V.
    Maybe jaquith can tell me whether I'll be in trouble with the VCCSA.
    Thanks again.
  7. Well on one of the MOBO's, R4E, it lists 1.25v for VCCSA - http://www.gskill.com/products.php?index=438

    To see the XMP Profile set the AI Overclock Tuner -> XMP / Profile 1 ; see example:


    Also, AIDA64 Extreme will list the VCCSA Voltage if it's encoded - http://www.aida64.com/downloads ; example:
  8. Its an X79 system; not Z77! I've already purchased the memory, MoBo and CPU.
    ASRock X79 Extreme 3, G Skill F3-17000CL9Q-16GBZH (2133MHz 16GB 1.65V) and i7 3820.
    Does anyone know whether I'll have a problem with the 1.65V Memory?
  9. Best answer
    Never thought it was a Z77 -- where's that coming from??

    AGAIN, there's (2) T-W-O bad voltages for the SB, SB-E and IB that will degrade your CPU: 1. Excessive vCore AND/OR 2. VCCSA Voltages. Specifically on SB-E VCCSA 1.20v is the max safe voltage, and 1.35v VCCSA and/or 1.55v vCore or higher voltages have been proven to degrade the SB-E in a matter of hours or days permanently. Lesser voltages will do the same it just takes longer for the voltages to do the damage.

    I am NOT worried about the DRAM Voltage. The example above is from my X79 -- note 8xDIMMs.

    There are plenty of 1.50v DDR3-1866~DDR3-2133 kits. G.SKILL F3-14900CL9Q-16GBZL is an okay DDR3-1866, but for DDR3-2133 @ 1.50v I'd recommend the Mushkin Enhanced Blackline 16GB (4 x 4GB) DDR3 2133 (10-11-10-28) Model 994015 or Corsair CMZ16GX3M4A2133C11B.
  10. nikorr said:


    Thanks - its 1866MHz. I've already purchased 2133 MHz.
  11. nikorr said:
    Hi there, u don't need only G skill.

    How much RAM do u need?


    I'm video editing. I thought 16GB and at 2133MHz was reasonable.
  12. jsc said:
    Memory faster than DDR3-1600 speeds will have an almost unnoticeable effect on overall system speed.

    Just buy DDR3-1600 1.5 volt RAM and do not worry about faster RAM.



    I've already bought it.
  13. Best answer selected by i7Baby.
  14. This topic has been closed by Nikorr
Ask a new question

Read More

ASrock G.SKILL Memory CPUs Motherboards Product