UD7 VDIMM fluctuating

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18 Jun 2009
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140
Hello, I noticed when I set 1.640v VDIMM in the bios, then I check with ET6 or PC Health Status, they report actual VDIMM flipping between 1.616v and 1.632v... is that normal?
 
sorry for the hijack, but how are you finding the stability of this board boldenc? i can't say i've noticed the Vdimm fluctuation, but i get blue screens frequently even when the computer is sat doing nothing; but will happily run prime/linx/games for hours...
 
i've had BSoD with F2 and F3, haven't tried F4; was kinda hoping it would be more stable...

may i ask, what settings you are using? i know they won't translate directly to my setup, but i'd be interested to see what works best for you.

many thanks
 
GIGABYTE GA-X58A-UD7 F2
MB Intelligent Tweaker(M.I.T.)
Advanced CPU Features {Press Enter]
CPU Clock Ratio............................: 21
CPU Frequency .....(Ghz)...................: 4.01
Intel(R) Turbo Boost Tech..................: enabled
CPU Cores Enabled..........................: all
CPU Multi Threading........................: Enabled
CPU Enhanced Halt (C1E)....................: Enabled
C3/C6/C7 State Support.....................: Disabled
CPU Thermal Monitor........................: Disabled
CPU EIST Function..........................: Enabled
Bi-Directional PROCHOT.....................: Disabled
Virtualization Technology..................: Disabled

Uncore & QPI Features [Press Enter]
QPI Clock Ratio*...........................: 6.87
QPI Link Speed* ......................(Ghz):x36
Uncore Clock Ratio.........................: 17x
Uncore Frequency......................(Mhz): Auto
Isochronous Support........................: Enabled
Advanced Clock Control [Press Enter]
>>>>>Standard Clock Control
Base Clock (BCLK) Control*.................: enabled
BCLK Frequency (Mhz)*......................: 191
PCI Exxpress Frequency (Mhz)...............: 100
>>>>>Standard Clock Control
CPU Clock Drive (mV).......................: 800
PCI Express Clock Drive (mV)..............: 900
CPU Clock Skew (ps)........................: 0
IOH Clock Skew (ps)........................: 0
Advanced Dram Features [Press Enter}
Performance Enhance........................: turbo
Extreme Memory Profile (X.M.P.)............: disabled
System Memory Multiplier (SPD).............: x8
Memory Frequency (Mhz).....................: 1528
DRAM Timing Selectable (sPD) ..............: Quick
7-7-7-20-1

Advanced Voltage Control [Press Enter]
>>>>CPU Voltages
LoadLine Calibration.........................: level 1
CPU Vcore....................................: 1.27500

QPI/VTT Voltage..............................: 1.275V
CPU PLL......................................: normal
>>>>>MCH/ICH Voltrage
PCIE.........................................: auto
QPI PLL......................................: 1.14
IOH Core.....................................:1.14
ICH I/O......................................: auto
ICH Core.....................................: auto
>>>>>Dram
DRAM Voltage.................................: 1.640V
DRAM Termination.............................: auto
Ch-A Data Vref...............................: auto
Ch-B Data Vref...............................: auto
Ch-C Data VRef...............................: auto
Ch-A Address Vref............................:auto
Ch-B Address Vref............................:auto
Ch-C Address VRef............................: auto
 
much appreciated :)

i don't suppose you know what your cpu pll is ending up at? i've got mine on 1.3, seems fine.

also, do you notice a difference between performance enhance 'turbo' and 'standard'? i've left it on standard (due to it claiming to be more stable).


cheers :)
 
much appreciated :)

i don't suppose you know what your cpu pll is ending up at? i've got mine on 1.3, seems fine.

also, do you notice a difference between performance enhance 'turbo' and 'standard'? i've left it on standard (due to it claiming to be more stable).


cheers :)

It is recommended to leave CPU PLL at default 1.800
It could be your low CPU PLL which is causing your problems.
Bios F4 enhance memory compatibility so maybe it will be good for you.
I didn't try before to use standard and I think difference will be minimal.

cheers :)
 
@OP can you verify this measurement with a voltmeter? At present it's hard to say whether the fluctuation is due to software limitations or the board itself. Ram certainly will have a vdroop associated with it, but I don't know of what sort of magnitude.

@TwIsTeD are you using load line calibration? I had issues with a P45 board where llc enabled caused the voltage to drop slightly too far after an idle period, but with llc off (and a slightly higher vcore set to compensate for this) all was well.

@boldenc it's well worth trying cpu pll both higher and lower than the stock 1.8V, people have reported increased stability down to about 1.3 or so. My UD5 seems to like 1.7V the most.
 
It is recommended to leave CPU PLL at default 1.800
It could be your low CPU PLL which is causing your problems.
Bios F4 enhance memory compatibility so maybe it will be good for you.
I didn't try before to use standard and I think difference will be minimal.

cheers :)

i've tried pretty much every pll setting (up to 1.88, down to 1.3) and nothing really seems noticably different... i'm going to keep experimenting with various other voltages to see if i can get it sorted.

i'm wondering if i've got a dodgy stick of ram, i'll run memtest a bit later to verify.

@twisted are you using load line calibration? I had issues with a P45 board where llc enabled caused the voltage to drop slightly too far after an idle period, but with llc off (and a slightly higher vcore set to compensate for this) all was well.

no, i leave LLC off - i don't really see the point it in, considering you can get a stable clock at decent voltages with these chips.

i don't suppose you have any experience with the gigabyte dynamic voltage setting? i'd like to give that a try but not entirely sure of appropriate settings.
 
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