Please report all spam threads, posts and suspicious members. We receive spam notifications and will take immediate action!
Results 1 to 8 of 8

Thread: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate




  1. #1
    Join Date
    Dec 2011
    Location
    United States
    Posts
    4

    Default GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    I just setup a new system


    - Gigabyte GA-Z68XP-UD3
    - i7 2600k
    - OCZ ZX 1000w
    - x2 Sticks of Corsair Vengeance (2X4 GB) PC3-12800 1600mHz DDR3 240-Pin SDRAM
    - Latest bios version F8
    - Stock bios settings
    I ran Prime95 and had instant rounding errors. From what I've read this is usually a RAM issue. So I memtested both sticks, alone and in all combinations of slots. No issues.

    However, Prime95 runs fine as long as I only have a single stick of RAM in the board. It works for both sticks independently, and it doesn't matter what slot the RAM is in. As soon as I have both sticks in though - instant Prime95 rounding errors.

    The only thing I've tried is to manually set the correct timing and mhz to match what reads on the sticks. The GA-Z68XP-UD3 reads the 1600mhz sticks @ 1300mhz in bios, so I've corrected that - however I still have the same exact errors.

    The system seems completely stable otherwise.

    Is there something I'm missing in BIOS settings to get these two sticks of RAM to cooperate? Or is the RAM bad, regardless of memtest? Or is it the motherboard? Thanks in advance for any advice you can offer.

  2. #2
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
    Join Date
    Dec 2008
    Location
    Tacoma, WA. [USA]
    Posts
    7,811

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Q9650 @ 4.10GHz [9x456MHz]
    P35-DS4 [rev: 2.0] ~ Bios: F14
    4x2GB OCZ Reaper PC2-8500 1094MHz @5-5-5-15
    MSI N460GTX Hawk Talon Attack (1GB) video card <---- SLI ---->
    Seasonic SS-660XP2 80 Plus Platinum psu (660w)
    WD Caviar Black WD6401AALS 640GB (data)
    Samsung 840 Pro 256GB SSD (boot)
    SLI @ 16/4 works when running HyperSLI
    Cooler Master 120XL Seidon push/pull AIO cpu water cooling
    Cooler Master HAF XB computer case (RC-902XB-KKN1)
    Asus VH242H 24" monitor [1920x1080]
    MSI N460GTX Hawk (1GB) video card
    Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium
    HT|Omega Claro plus+ sound card
    CyberPower CP1500PFCLCD UPS
    E6300 (R0) @ 3.504GHz [8x438MHz] ~~ P35-DS3L [rev: 1.0] ~ Bios: F9 ~~ 4x2GB Kingston HyperX T1 PC2-8500, 876MHz @4-4-4-10
    Seasonic X650 80+ gold psu (650w) ~~ Xigmatek Balder HDT 1283 cpu cooler ~~ Cooler Master CM 690 case (RC-690-KKN1-GP)
    Samsung 830 128GB SSD MZ-7PC128B/WW (boot) ~~ WD Caviar Black WD6401AALS 640GB (data) ~~ ZM-MFC2 fan controller
    HT|Omega Striker 7.1 sound card ~~ Asus VH242H monitor [1920x1080] ~~ Logitech Z-5500 Digital 5.1 Speakers
    win7 x64 sp1 Home Premium ~~ CyberPower CP1500PFCLCD U.P.S
    .


  3. #3
    flyfisher is offline Member
    Join Date
    Dec 2008
    Location
    South Central PA
    Posts
    191

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Does your ram have an XMP profile? If so I would enable that. You should also try increasing the QPI/vtt voltage a little, try 1.075-1.1 volts. Also manually enter ram voltage.

  4. #4
    Join Date
    Dec 2011
    Location
    United States
    Posts
    4

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    The only way to pass Prime95 blend is to over-volt my RAM to 1.6v, everything else is set to stock. Corsair's claimed settings are 1.5v. Everything I've read suggested that RAM voltage over 1.5 is a bad idea to do in relation to the Intel I7-2600k.

  5. #5
    flyfisher is offline Member
    Join Date
    Dec 2008
    Location
    South Central PA
    Posts
    191

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Quote Originally Posted by 53x11 View Post
    The only way to pass Prime95 blend is to over-volt my RAM to 1.6v, everything else is set to stock. Corsair's claimed settings are 1.5v. Everything I've read suggested that RAM voltage over 1.5 is a bad idea to do in relation to the Intel I7-2600k.
    As I said, does your RAM have an XMP profile? If so enable it. Take QPI/vtt off of auto and set to 1.1 volts. My 2x4GB GSKill XMP profile sets QPI/vtt to 1.05 volts but it was not 100% stable until I increased it to 1.085 volts.

  6. #6
    Join Date
    Dec 2011
    Location
    United States
    Posts
    4

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Quote Originally Posted by flyfisher View Post
    As I said, does your RAM have an XMP profile? If so enable it. Take QPI/vtt off of auto and set to 1.1 volts. My 2x4GB GSKill XMP profile sets QPI/vtt to 1.05 volts but it was not 100% stable until I increased it to 1.085 volts.
    This was one of the first things I tried, along with the RAM instructions in the techreaction.net guide (as posted above). After setting the XMP profile, I worked my way up from stock QPI/vtt voltage all the way to 1.2v at at .025 increments - with immediate Prime95 Blend errors at every step. I even tried all combinations of VccIO voltage up to 1.2v as well.

    A Corsair tech suggest that since the errors only happen when I have both sticks of RAM in matching Dual-Channel slots, that it is a Motherboard or CPU issue.

    However, I can get my system Prime95 Blend stable for 8 hours if I over-volt my RAM to 1.61v.

  7. #7
    Join Date
    Dec 2009
    Location
    Pavilion, NY
    Posts
    22

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Personally, I don't see any problem setting your RAM voltage to 1.61V. I have cheaper Kingston RAM, and while the SPD shows the RAM voltage to be 1.5V for 1333MHz, the XMP profile shows the voltage needs to be 1.65V to run at 1600MHz. I'm running mine at 1.645V (Z68XP-UD4/i5-2500K, 16GB RAM, 4.7GHz). While the system has only been together for approximately 1 month, my previous system (P55-UD4P) used similar memory that I also ran at 1.645V for 2 years before passing the system on to my son, when I built the new system.

  8. #8
    Join Date
    Dec 2011
    Location
    United States
    Posts
    4

    Default Re: GA-Z68XP-UD3, can't get 2 sticks of RAM to cooperate

    Problem Solved. Bad RAM! I RMA'd it for the same exact set. It now works perfectly at STOCK voltage. This was after Corsair techs told me it was most certainly not the RAM and probably my Motherboard or CPU. Thank you everyone (except Corsair) for your sage advice!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •