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Old 08-02-2010, 11:11 PM   #1
roid2000
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i7 920 Uncore VTT question

Hi all, this is my first post, but in fact I am not new here.
Before I build my i7 system I google my DFI UT X58 and find there is many good information for me.
After 3 months of trying...

I can not get my 920 D0 stable with my 1866 Corsair.
I would like to ask you guys to help me with this problem.
First of all I am listing my System.
CPU: 920 D0
MB: DFI UT X58
Ram: 6GB Corsair Dominator 1866C9 @ 1.65v
Cooling: Thermalright TB120 on CPU IFX HR-05 on NB
PSU: Corsair HX1000
VGA: 5870 HIS
Sound: SB X-fi TI ( will this the coz of unstable???)

I have go thought almost 35 Pages of UT X58 O/C guide, the thread about Unstable on Linx/Prime95 on D0. Many other pages from other Forums. So, I think I am quite sure I am doing right.

The confirmed list for my system stabled setup
CPU: 3990 (210*19/ 190*21) @ 1.296 Vcore (12hours Prime 95 Win7 64bit 25.9)
Ram: 1600 9-9-9-24 @1.61v~1.65v (12hour Memtest v4.0 CD Rom)
Uncore: 2800 (140*20) @1.31 (12Hour Prime 95 Large FFT)
I tried the musical chair method/ (123/132/231/213/312/321)
raising the VTT up to 1.37 (DFI SG 1.39vtt)/
Up IOH Core to 1.23v/
CPU Pll 1.9v/
Stock CPU 2.66G 1066/1200/1333/1600 Ram with 3200/3600 Uncore

all were no go even I am trying Uncore 3040(190*16).
No matter what I set there is one or more random (usually 30mins to 3 Hours) Roundup Error from Prime95 Large FFT test no Freeze no BSOD.
All I can run my O/C stable is 210*19 3990 @1.296v CPU 1260/2520 1.56/1.31 Ram/Uncore
And suggestion that can help me on O/C the uncore
Thanks you very much
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Old 08-02-2010, 11:14 PM   #2
roid2000
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Posts: 5
CPU Feature
Set VR Current Limit Max: Disabled
Thermal Management Control: Disbale
EIST Function: Enable
CxE Function: Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

***** Logical Processor Setting *****
Intel HT Technology: Enabled
Active Processor Cores: All

DRAM Timing
Memory Control Setting: AUTO
Memory LowGap: 1536M

DRAM Command Rate: 2N
CAS Latency Time (tCL): 9
RAS# to CAS# Delay (tRCD): 9
RAS# Precharge (tRP): 9
Precharge Delay (tRAS): 24
REF to ACT Delay (tRFC): 103
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
ACT to ACT Delay (tRRD): AUTO
Row Cycle Time (tRC): AUTO
Read CAS# Precharge (tRTP): AUTO
Four ACT WIN Time (tFAW): AUTO

Voltage Setting
O.C. Shut Down Free: Diable
CPU VID Control: 1.293X
CPU VID Special Add Limit: Enabled
CPU VID Special Add: 1.07%
Vcore Droop Control: Diabled
DRAM Bus Voltage: 1.665v
DRAM PWM Switch Frequency: Nominal
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: AUTO
CPU VTT Voltage: 1.34v
VTT PWM Switch Frequency: Nominal
VTT PWM Phase Control: 2 Phase Operation
CPU PLL Voltage: 1.80v
IOH/ICH 1.1V Voltage: 1.11v
IOH Analog Voltage: 1.10v
ICH 1.5 Voltage: 1.5v
ICH 1.05V Voltage: 1.05v
DIMM 1/2 DQ/DQSTB Bus VREF: -00.0%
DIMM 3/4 DQ/DQSTB Bus VREF: -00.0%
DIMM 5/6 DQ/DQSTB Bus VREF: -00.0%
ADDR/CMD VREF Control: Disabled
x DIMM 1/2 ADDR/CMD Bus VREF: 110
x DIMM 3/4 ADDR/CMD Bus VREF: 110
x DIMM 5/6 ADDR/CMD Bus VREF: 110
CPU QPI Drive Strength: Normal
IOH QPI Drive Strength: Normal

Exit Setup Shut down: Mode 2
O.C. Fail Retry Counter: Enabled
O.C. Fail CMOS Reload: Disabled

PPM Function: Enabled
Turbo Mode Function: Disabled
1 core Max Turbo Ratio: 22x
2 core Max Turbo Ratio: 21x
3 core Max Turbo Ratio: 21x
4 core Max Turbo Ratio: 21x
CPU Non-Turbo Clock Ratio: 20x

* BCLK/UCLK/QPI Controller Settings *
QPI Control Settings: Enabled
QPI Link Fast Mode: Enabled
QPI Frequency: 4.8GT
CPU Base Clock (BCLK): 190 Mhz
Boot Up CPU Base Clock: AUTO
PCIE Clock: 100 Mhz
DRAM Frequency: 1520
UnCore Frequency: 3040
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
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Old 09-02-2010, 02:55 AM   #3
cowie
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Location: new jersey,usa
Posts: 1,251
this always works for me on my do dfi combo

O.C. Shut Down Free: Diable
CPU VID Control: 1.312X
CPU VID Special Add Limit: Enabled
CPU VID Special Add: 1.07%
Vcore Droop Control: Diabled
DRAM Bus Voltage: 1.675v
DRAM PWM Switch Frequency: Nominal
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: AUTO
CPU VTT Voltage: 1.24-28v
VTT PWM Switch Frequency: Nominal
VTT PWM Phase Control: 2 Phase Operation
CPU PLL Voltage: 1.80v
IOH/ICH 1.1V Voltage: 1.17v
IOH Analog Voltage: 1.15v
ICH 1.5 Voltage: 1.5v
ICH 1.05V Voltage: 1.05v

my chip seem to run ok lower vvt if ram is not to high
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Old 09-02-2010, 03:10 AM   #4
roid2000
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Hi, thanks for your reply!
My MB/CPU dont like low vtt too.
I found my UT x58 only have 1.665 and 1.68 I tried 1.68 SG 1.66

Just now I came across a thread talking about Vcore droop: Disabled/Enabled

Since I disabled the droop on day one I am not sure if it is the cause of error

It passed 10 IBT Maximum 8 Thread after I enable the dropp...
CPU 133*20 2666
Ram 133*14 1866
Uncore 133*28 3733
VCore 1.28 Bios 1.23 Load in CPUID/SG
Ram/VTT 1.66/1.37 in SG
Will try my Cursed Prime95 Large FFT later.
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Old 10-02-2010, 12:42 AM   #5
eva2000
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Most likely in your case, try higher vcore

Also updated version of DFI notes at http://i4memory.com/f80/initial-note...8-t3eh8-18821/
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Old 10-02-2010, 01:50 AM   #6
roid2000
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Tried the Setting passed IBT 15run Prime 95 still 27min Error in Large FFT

Eva- thx for your reply but I did try stock CPU 2.66G with 1.25Vcore still error in Large FFT
Do I need more Vcore when I am testing the max uncore??
Thx
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Old 10-02-2010, 02:06 AM   #7
eva2000
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set tFAW to 31 and see what happens.
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Old 10-02-2010, 06:12 PM   #8
roid2000
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I am not sure but After I set tFAW 31 in Bios and lower the Uncore/Ram to 3200/1600
Voltage unchange.
was getting Error after 30mins
Now the Error start from 22 min and 30 mins get another thread Error.
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