i7-920 can not get to 4GHz

setter · 27 Apr 2011 at 22:47

Speed said:
Most people find that 21x191 is easier to achieve than 20x200

I found this to be the case with my combo, 21x193 on 1.2750 vcore, at 20x200 i needed a jump to 1.300v, slight adjustment to qpi as well iirc, 4.2ghz is proving to be a little harder to crack though.

didgemaster · 27 Apr 2011 at 23:46

I forgot the Blk also affects QPI link speed with it being so high of course its going to be unstable - I will keep working on getting the QPI stable

didgemaster · 28 Apr 2011 at 09:09

didn't get to set the QPI last night before I went to bed. I left it running with the QPI set to auto and the vcore set to 1.3. this morning I have a 0xD1 error - increase/decrease the QPI as necessary

Its set to auto! - anyone got any suggestions??

Should I ignore this BSOD and start using set values and wait for different error codes?

Nameless_87 · 28 Apr 2011 at 09:52

I tried reducing the BCLK and with BCLK of 189 instead of 191... I can get it stable with 1.22 QPI... (not tested fully though, just 3 runs in IntelBurnTest.

Then I set it back to 191 and windows froze on the logo, so I upped the QPI to 1.24 and tried again. However it restarts automatically while running IntelBurnTest.

Should I just leave the RAM at 6.0 with almost 1200MHz or should I keep trying?

Cause I do not know what to tweak next... Every voltage is an auto except QPI, Vcore, IOH (1.1) and DRAM Voltage

Kevin1234 · 28 Apr 2011 at 14:39

Nameless_87
On my Gigabyte x58 UD5 rev 1.0 4.0Ghz i need 1.375vcore to run LinX 20 times without errors. Are you safe to go to that level temps <80c? All other settings are at your tested highest thereabouts. qpi 1.38 20x200 9-9-9-28 2t 1600 mem etc etc

Nameless_87 · 28 Apr 2011 at 17:11

The thing is that the cpu is stable... it's the ram that's giving me problems.

When increasing the Memory multiplier, hence the ram's speed, the Vcore has to be increased as well?

Thanks

didgemaster · 29 Apr 2011 at 21:12

I seem to have a stable overclock of 4GHz!!! However its with the memory multiplier at 6 not 8. Currently I'm using the 21 multiplier, I am going to try and use the 20 multiplier to gain extra memory speed.

Nameless_87 · 29 Apr 2011 at 21:40

Me too didgemaster... but decided to leave the memory at 6 and not go for 8 cause it was not stable and it doesn't matter as in real life performance you will not notice any difference.

I set DRAM on Auto (which is taking 1.52V according to CPUID HW)
QPI at 1.22
IOH at 1.1V
VCore at 1.275V

stable for 20 runs of IntelBurnTest on maximum stress and 16 threads.

Will run prime95 blend overnight. If it passes 12 hours, (which should since it already passed 18hours) I'll consider it stable as this is not a 24/7 PC.

Monstermunch · 30 Apr 2011 at 00:43

Air or Water... What to do?

posted in wrong place, please delete.

silversurfer · 30 Apr 2011 at 22:30

Kevin1234 said:
Nameless_87
On my Gigabyte x58 UD5 rev 1.0 4.0Ghz i need 1.375vcore to run LinX 20 times without errors. Are you safe to go to that level temps <80c? All other settings are at your tested highest thereabouts. qpi 1.38 20x200 9-9-9-28 2t 1600 mem etc etc

Got the same board, 21x191 and vcore is 1.31
Cant claim any credit as the last user of this board set it all up and its works fine for me even on a stock cooler though gets up to 97c

Not often I would be using all cores 100%, its stable anyway

Pi to 32m in 11.7 seconds and 1024m in 366 secs with 16 threads

http://valid.canardpc.com/show_oc.php?id=1795926

hlennie · 1 May 2011 at 08:30

I found that a high qpi 1.4v and uP helped with memory overclock and stability

didgemaster · 3 May 2011 at 07:16

For future reference if someone else wants my BIOS Settings

Advanced CPU Features:
CPU Clock Ratio ................................ [21x]
Intel(R) Turbo Boost Tech .................. [Disabled]
CPU Cores Enabled ............................ [All]
CPU Multi Threading .......................... [Enabled]
CPU Enhanced Halt (C1E) ................... [Disabled]
C3/C6/C7 State Support .................... [Disabled]
CPU Thermal Monitor ......................... [Enabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled]
Bi-Directional PROCHOT ..................... [Enabled]

Uncore & QPI Features:
QPI Link Speed .............................. x36
Uncore Frequency .......................... x16
Isonchronous Frequency ..................[Enabled]

Standard Clock Control:
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) .....................181
PCI Express Frequency (MHz) ........... [100]

C.I.A.2 [Disabled]

Advanced Clock Control:
CPU Clock Drive ..............................[900mV]
PCI Express Clock Drive ................... [800mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]

Advanced DRAM Features:
Performance Enhance ...................... [Standard]
Extreme Memory Profile (X.M.P) ......... [Disabled]
System Memory Multiplier (SPD) ........ [6]
DRAM Timing Selectable (SPD) .......... [Quick]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ......................8
tRCD .......................................8
tRP .........................................8
tRAS .......................................24

##Channel A Advanced Timing Control##
tRC ........................................ [auto]
tRRD ....................................... [auto]
tWTR ...................................... [auto]
tWR ........................................ [auto]
tWTP ....................................... [auto]
tWL ........................................ [auto]
tRFC ....................................... [auto]
tRTP ....................................... [auto]
tFAW ...................................... [auto]

Command Rate (CMD) ................ [auto]

##Channel A Misc Timing Control##
Round Trip Latency ...................
B2B CAS Delay ..........................

Advanced Voltage Control:

CPU
Load Line Calibration ................. [Enabled]
Dynamic Vcore (DVID) ............... [Normal]
CPU Vcore ............................... 1.325v
QPI/VTT Voltage 1.150v ............1.195v
CPU PLL 1.800v ....................... [auto]

MCH/ICH
PCIE 1.500v ........................... [auto]
QPI PLL 1.100v ....................... [auto]
IOH Core 1.100v ..................... [auto]
ICH I/O 1.500v ....................... [auto]
ICH Core 1.1v ........................ [auto]

DRAM
DRAM Voltage 1.500v .............. 1.66v
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]

This is 24 hr prime 95 stable

MooMoo444 · 3 May 2011 at 13:19

I have to run at 6x memory multiplier also, meaning my RAM runs at 1206mhz rather than 1600..but it's an acceptable tradeoff for me as memory frequency really doesn't make any impact according to many benchmarks. (Some programs it does, but not really gaming!)

I think mine is just faulty memory though, as it will lock up with the memory at x8 even when CPU is at stock. [email protected] is sure as hell better than 2.67 hehe ^^

Glad you got yours working (sorta) though!

loudbob · 3 May 2011 at 20:05

didgemaster said:
BIOS Settings can be found here

Looking through your bios settings and to acheive a 4.0Ghz @ 200bclk I would suggest:

Advanced CPU Features:
CPU Clock Ratio ................................ [21x] --- [20x]
Intel(R) Turbo Boost Tech .................. [Disabled]
CPU Cores Enabled ............................ [All]
CPU Multi Threading .......................... [Enabled]
CPU Enhanced Halt (C1E) ................... [Disabled]
C3/C6/C7 State Support .................... [Disabled]
CPU Thermal Monitor ......................... [Enabled] --- [Disabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled]
Bi-Directional PROCHOT ..................... [Enabled] --- [Disabled]

Uncore & QPI Features:
QPI Link Speed .............................. x36 --- [32x if available, leave if not]
Uncore Frequency .......................... x16 --- [20x if possible, highest if 20x not available]
Isonchronous Frequency ..................[Enabled] --- [Disabled]

Standard Clock Control:
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) .....................181 --- [200]
PCI Express Frequency (MHz) ........... [100]

C.I.A.2 [Disabled]

Advanced Clock Control:
CPU Clock Drive ..............................[900mV]
PCI Express Clock Drive ................... [800mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]

Advanced DRAM Features:
Performance Enhance ...................... [Standard]
Extreme Memory Profile (X.M.P) ......... [Disabled]
System Memory Multiplier (SPD) ........ [8]
DRAM Timing Selectable (SPD) .......... [Quick] --- [Standard]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ......................8 --- [9]
tRCD .......................................8 --- [9]
tRP .........................................8 --- [9]
tRAS .......................................24 --- [27]

##Channel A Advanced Timing Control##
tRC ........................................ [auto]
tRRD ....................................... [auto]
tWTR ...................................... [auto]
tWR ........................................ [auto]
tWTP ....................................... [auto]
tWL ........................................ [auto]
tRFC ....................................... [auto]
tRTP ....................................... [auto]
tFAW ...................................... [auto]

Command Rate (CMD) ................ [auto] --- [2]

##Channel A Misc Timing Control##
Round Trip Latency ...................
B2B CAS Delay ..........................

Advanced Voltage Control:

CPU
Load Line Calibration ................. [Enabled]
Dynamic Vcore (DVID) ............... [Normal]
CPU Vcore ............................... 1.325v --- [1.38125v]
QPI/VTT Voltage 1.150v ............1.195v --- [Auto or 1.4v]
CPU PLL 1.800v ....................... [auto] --- [1.9080v]

MCH/ICH
PCIE 1.500v ........................... [auto]
QPI PLL 1.100v ....................... [auto]
IOH Core 1.100v ..................... [auto]
ICH I/O 1.500v ....................... [auto]
ICH Core 1.1v ........................ [auto]

DRAM
DRAM Voltage 1.500v .............. 1.66v --- [possibly increase to 1.7v]
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]

Run Intel Burn Test (20 times - High Stress - 8 Threads) to check stability.

If stable, you can then proceed to reduce Vcore and recheck - if Gflops start dropping on stability test (from previous test scores) you know you have gone too far (another obvious sign is instability).

Before you try the above (if you try the above) make sure you do the Intel Burn Test and record results for comparison.

Edit (again): Incidently, these settings allow my i7 930 to run at 4.2Ghz - I could try to improve, but I really can't be bothered spending the time to do so (knowing I will only have to do it again once I replace the CPU).