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Thread: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts




  1. #1
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    Question GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    Hi,

    I have a GA-X58A-UD7 mobo Bios F6 and use 6GB Dominator GT 1866CL7.

    The default XMP profile OF MY MEMORY requires 1.65V for DRAM voltage, while according to Easytune the mobo actually provides 1.66volts.

    Also, while for qpi/vtt voltage the XMP requires 1.6v WELL ABOVE the 1.35v threshold (mention in I7-960 specs). Manually I managed to get a stable bootup at 1.46 volts qpi/vtt, but still thats well above the 1.35v.

    So, my question is... is this QPI/VTT voltage (1.46 or 1.6) safe for the motherboard and the CPU memory controller?


    And also a second question if I may...

    According to the XMP Profile I should get the following timings: 7 8 7 20 2T while in reality (according to CPU ID) I get 7 8 7 25 2T.

    Is there any way to resolve this or is there a new bios coming up fully supporting this memory?

    Thanks in advance for your time!




  2. #2
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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    its best to disable xmp and set the memory yourself,its 1.66v for your ram or dram,qpi should be around 1.35v never 1.6v,cpu should be set to normal voltage setting for stock clocks,raise the memory multiplier/std to give you 1866 or slightly less,you might need to overclock cpu/raise bclk to be able to use full 1866mhz ram speed,enter the timings yourself or use slightle looser timings of 8-8-8-24-command rate 1t as it will need less qpi voltage
    Gigabyte z77x UP4-TH F11c Modded Bios
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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    Thanks for the quick response!

    In 1.35v qpi/vtt voltage it will not even boot up. Since Corsair put this 1.6 volt as qpi voltage in their default XMP profile, shouldn't this be ok? I ve read many threads stating that as long as there is a 0.5V difference between QPI/VTT (QPI voltage) and DRAM voltage there is no problem with the CPU. Still, the I7-900 Series specs define as maximum qpi voltage the 1.35v value that simply doesn't work for me.

    Of course if I underclock my memories most probably I will achieve the 1.35 value but still thats not what I payed for, is it?

    Thank you for your response... I was trying to avoid your solution and hoping to a reply from Giagbyte (perhaps an enhanced compatibility bios version for this memory kit)

    Thank you!

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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    Quote Originally Posted by ElGreco View Post
    Thanks for the quick response!

    In 1.35v qpi/vtt voltage it will not even boot up. Since Corsair put this 1.6 volt as qpi voltage in their default XMP profile, shouldn't this be ok? I ve read many threads stating that as long as there is a 0.5V difference between QPI/VTT (QPI voltage) and DRAM voltage there is no problem with the CPU. Still, the I7-900 Series specs define as maximum qpi voltage the 1.35v value that simply doesn't work for me.

    Of course if I underclock my memories most probably I will achieve the 1.35 value but still thats not what I payed for, is it?

    Thank you for your response... I was trying to avoid your solution and hoping to a reply from Giagbyte (perhaps an enhanced compatibility bios version for this memory kit)

    Thank you!
    ive never known anyone needing 1.6v for 1866mhz ram,are you at stock cpu clocks? if your overclocked does it affect the xmp profile? try setting system performance enhance to standard and your qpi freq to twice your ram multiplier and add one to it,i run my ram at 1800mhz with 1.3v qpi,you shouldnt need much more maybe 1.4-1.45 max.did you set dram voltage to 1.66??
    Gigabyte z77x UP4-TH F11c Modded Bios
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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    You are absolutely right!

    As mentioned in my initial post after reading about the 1.35v QPI voltage limit few days ago, I immediately tried lower voltages starting from 1.3v and increasing by 0.02v every time.

    1.46 is the lowest stable value of QPI/VTT voltage I can use to get the memory kit specs performance and thats the voltage I use now!

    But still, isn't 1.46v well beyond the 1.35v threshold? Will that harm my mobo or my CPU memory controller? Have I perhaps already damaged (even partially) my mobo or CPU? Is there a way to find that out?

    My entire PC (I7-960, XFX 5970BE etc) operates at standard speeds and NO overclocking at all has ever been used (not even the turbo mode of my I7-960). System performance enhance is set to standard as well

    Of course soon I will check your proposed settings as well just in case I manage to get lower voltages for QPI/VTT... Currently I am running memtest...
    Last edited by ElGreco; 06-07-2010 at 02:35 AM.

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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    1.46 is ok as long as you stick to the .5v ram rule it wont damage the memory controller in the cpu,what cpu multi are you using with that chip? maybe try a 21x160 for you bclk or 22x 150?? as it will use less voltage and enable turbo?? or leave it on auto/stock if you like but its worth a try to see if you use less qpi voltage
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
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    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
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  7. #7
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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    More is fine, some CPU's or memory need this anyway.

    See my thoughts on XMP and QPI/Vtt amounts here
    QPI/Vtt Voltage post (High is OK)

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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    Quote Originally Posted by wazza300 View Post
    1.46 is ok as long as you stick to the .5v ram rule it wont damage the memory controller in the cpu,what cpu multi are you using with that chip? maybe try a 21x160 for you bclk or 22x 150?? as it will use less voltage and enable turbo?? or leave it on auto/stock if you like but its worth a try to see if you use less qpi voltage
    1.46V is following the .5v ram rule, but also the 1.6v follows the same rule and as you also say 1.6v is way too much. Of course I will keep the 1.46v but still this is beyond the i7-9xx series 1.35v threshold (i7 9xxx specs page 22)

    I 've been running my new system the last 4 months (until 2 days ago) at 1.6v qpi voltage with no problems and I am wondering if this has already caused any internal damage to my CPU.

    Anyway, thanks for the advice - I will certainly try the 160 or 150 bclk you mention and will see if i will manage to get lower qpi voltages.

    Just for the record, my CPU runs currently at the default 24 x 133bclk =3.2GHz

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    Smile Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    Quote Originally Posted by Lsdmeasap View Post
    More is fine, some CPU's or memory need this anyway.

    See my thoughts on XMP and QPI/Vtt amounts here
    QPI/Vtt Voltage post (High is OK)
    Thank you for the link... That's a great relief!

    Still I will use 1.46v qpi voltage but its nice to know that I haven't damaged my CPU or mobo.


    Great!

  10. #10
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    Default Re: GA-X58A-UD7 and Memory XMP QPI/Vtt 1.6 volts

    the lower the better for voltages aslong as its stable
    Gigabyte z77x UP4-TH F11c Modded Bios
    Intel i7 3770k 24/7@4.8ghz 1.38v Turbo llc +0.165v dvid multithreading enabled
    Samsung Green(MV-3V4G3D/US) 8GB @2133mhz 9-10-10-21-1t 1.55v
    Thermalright Silver Arrow Cpu Cooler
    1xSamsung 840 pro 256 Gb SSD windows 8.1 pro 64bit
    1xSamsung f4 HD204UI 2tb hard drive Storage
    Powercolor 7970 3gb V3 @1150mhz core/1700mhz mem,1.150v Accelero aftermarket air cooler 55c max
    Razer Lycosa Keyboard
    Logitech X-530 5.1 Speakers
    Lite-On iHAS124-19 24x Sata DVDRW
    K-World Hybrid DVB-T 210SE Digital T.V Card
    L.G E2260V L.E.D 1920x1080 Monitor
    Xfx Pro 750w silver rated Psu 80+
    Fractal Arc Midi Case

    http://i38.tinypic.com/14myvfa.jpg x58 ud5 <=3.8ghz + 4.2ghz Overclock Template!!
    http://www.youtube.com/user/warren304#p/u Visit Me On Youtube

    Lots Of Gaming Videos With X58 Ud5 System And Gpu On My Youtube Channel!!
    Just Uploaded New Battlefield 4 Video!!!!!!!!!!!!!!!!!!!!!!

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