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Can't get past 4.1 Gghz with I7 970

post #1 of 9
Thread Starter 
Hi
I am running the following setup :

I7 970
Asus Rampage III Extreme
Corsair Vengenance DDR3 2000 mhz
Custom watercooing

I previously had my cpu oc'ed to 4 ghz but had my bios settings wiped because of an bios update, so I decided to
push my cpu even higher this time.
The problem is that I can't get it past 4.1 ghz, I keep getting BSOD. The bios setting below is stable at 4.1 ghz.
and I have tried raising blck and cpu voltage to go higher, but no luck.

Where am I going wrong?

My bios settings for 4.1 are :


LN2 Mode [Disabled]***
QPI Loadline Calibration [Enabled]***

Sync Mode []
AI Overclock Tuner [Manual]
OC From CPU level Up [Auto] CPU Ratio Setting [23]
CPU Turbo Power Limit [Disabled]

>CPU Configuration
CPU Ratio Setting [23]
C1E Support [Disabled]
Hardware Prefetcher [Disabled]
Adjacent Cache Line Prefetcher [Disabled]
Intel(R) Virtualiyation Tech [Disabled] CPU TM Function [Disabled]
Execute Disable Bit [Disabled]
Intel(R) HT Technology [Enabled]
Active Processor Cores [1] all
A20M [Disabled]
Intel(R) SpeedStep(TM) Tech [Disabled]
Intel(R) C-STATE Tech disabled
C State package limit setting disabled

BCLK Frequency [179]
PCIE Frequency [100]
DRAM Frequency auto
UCLK Frequency auto
QPI Link Data Rate auto

Memory Configuration Protect [Enabled]

>DRAM Timing Control
CAS# Latency [] RAS# to CAS# Delay []
RAS# PRE Time []
RAS# ACT Time []
RAS# to RAS# Delay []
REF Cycle Time [] WRITE Recovery Time []
READ to PRE Time []
FOUR ACT WIN Time []
Back-To-BackCAS# Delay []

Timing Mode []
Round Trip Latency on CHA []
Round Trip Latency on CHB []
Round Trip Latency on CHC []

WRITE To READ Delay(DD) []
WRITE To READ Delay(DR) []
WRITE To READ Delay(SR) []
READ To WRITE Delay(DD) []
READ To WRITE Delay(DR) []
READ To WRITE Delay(SR) []
READ To READ Delay(DD) []
READ To READ Delay(DR) []
READ To READ Delay(SR) []
WRITE To WRITE Delay(DD) []
WRITE To WRITE Delay(DR) []
WRITE To WRITE Delay(SR) []

CPU Differential Amplitude [800 MV]
CPU Clock Skew delay 300
IOH Clock Skew delay 300
Extreme Engine Digi+
Digi+ PWR Mode [T-power]
PWR Volt. Control [Auto]
Load-Line Calibration [Enabled 100%]
CPU Voltege OCP [Enabled]
CPU PWM Frequency [1000Hz]

Extreme OV [Enabled]
Extreme OC [Auto]
CPU Voltage [1,26]
CPU PLL Voltage [1,55]
QPI/DRAM Core Voltage [1,3
DRAM Bus Voltage [1,5]

>DRAM REF Voltages
DRAM DATA REF Voltage on CHA []
DRAM CTRL REF Voltage on CHA []
DRAM DATA REF Voltage on CHB []
DRAM CTRL REF Voltage on CHB []
DRAM DATA REF Voltage on CHC []
DRAM CTRL REF Voltage on CHC []

IOH Voltage [1,15
IOH PCIE Voltage auto

ICH Voltage [1,15]
ICH PCIE Voltage auto

Spread Spectrum Control
CPU Spread Spectrum [Disabled]
DRAM Spread Spectrum [Disabled]
Edited by Ticonderoga - 10/19/12 at 1:34am
post #2 of 9
You're only pushing through 1.26v on your vcore, up that to around 1.3 and you should be good to go. If that shows it as stable start dropping 0.01v off until it becomes unstable and then you know where you need to go on the voltage.

I used to get 3.8ghz at 1.28 on my 920.

Comps
post #3 of 9
CPU PLL 1.88
QPI/DRAM 1.35V
ICH1.2
IOH1.2V
DRAM 1.65

1.26 does not cut it for my I7-970 @4.05,I use 1.28
All of these voltages (except the cpu which is different for all) is in the "Quick and Dirty" guide to 4.0GHz.I think the biggest issue is the low QPI.Upping it to 1.35V made all the difference in the world for me. I use 21 as my cpu ratio..
Edited by PCCstudent - 10/19/12 at 2:44am
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WD 150gb Raptor LightScan Win 7 64-bit Acer 22" 
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post #4 of 9
Thread Starter 
Thanks for the input.
I will try changing the following when I get home from work :

CPU Voltage 1.3
BCLK 191
QPI/Dram 1.35

How does that sound?

My mem is rated at 1.5, so I think changing the DRAM to 1.65 will fry the memory?
post #5 of 9
Here is a review that talks about the claim that 1.5V is enough for your memory.
http://www.techreaction.net/2011/07/14/corsairs-vengeance-12gb-2000mhz-memory/4/

I have not done any work at all with 23 as my cpu ratio,only 21.
Edited by PCCstudent - 10/19/12 at 11:00am
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i7-930@4.05GHz ASUS P6X58D-Preminum XFX GeForce 275 896mb 6GB Corsair TR3X6G1600C8D 
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Hard DriveOptical DriveOSMonitor
WD 150gb Raptor LightScan Win 7 64-bit Acer 22" 
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post #6 of 9
Keep pushing it to 4.4Ghz smile.gif
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post #7 of 9
once you pass 4.0, the 1366 chips become voltage hungry whores. I can run 3.98ghz @ 1.24v's, 4.07 needs 1.3+.

Another thing that will stress the chip a lot is running 2000mhz memory. Run the memory at 1600, tighten the timings down some. This may allow some more headroom. Then you can drop the QPI down below 1.3.

You will also bring temps and over all stress down a bit by dropping the pwm freq. to 800hz. This will heat your mosfets up very quickly..

Keep The clock skew where you have it.

Another thing is to check you BSOD codes here:
http://www.overclock.net/t/935829/the-overclockers-bsod-code-list

Good luck
Wet Willy
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Wet Willy
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Oold man 555
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Hard DriveOptical DriveCoolingCooling
OCZ Agility 3 RAID0 lite on dvd burner Raystorm Danger Den 480 Full copper (paralleled)  
OSMonitorMonitorKeyboard
Dual boot, Windows7 64bit/Linux ubuntu64bit 1hpw2207h1680/1050  Sharp 60" LED 120hz s510 
PowerCaseMouseAudio
Ultra 1600w X4 NZXT, Tempest EVO logitech s510 combo Harmon Kardon AVR245 
CPUMotherboardGraphicsRAM
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post #8 of 9
Thread Starter 
I am starting to think that my chip wont go past 4.1.
I tried yesterday with following changes :

CPU Voltage 1.3
BCLK 191
QPI/Dram 1.35
Dram voltage 1.55

And it kept crashing almost right away. I then proceeded to lower the BCLK while keep theCPU voltage at 1.3 , but still no luck. , bsod x124.
Only when I go down to BCLK 179 is it stable.
post #9 of 9
Quote:
Originally Posted by Ticonderoga View Post

I am starting to think that my chip wont go past 4.1.
I tried yesterday with following changes :
CPU Voltage 1.3
BCLK 191
QPI/Dram 1.35
Dram voltage 1.55
And it kept crashing almost right away. I then proceeded to lower the BCLK while keep theCPU voltage at 1.3 , but still no luck. , bsod x124.
Only when I go down to BCLK 179 is it stable.

Right, to break the 4GHZ barrier you are going to need a considerable amount of Vcore extra, those chips are all the same, that 4ghz is a hard one and a lot of people decided that the extra Vcore wasn't worth it for the extra 1 or 200 mhz extra

I'd bump it to 1.33 and then try again.
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