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Hi guys,

 

First of all i want to thank everyone that is trying to help me out.

Ok lets get started. I'm quite new to the OC world but im willing to learn and try and try again.

 

Problem: stable with 1x2048MB but unstable with 2x2048MB or 3x2048MB

 

Setup now ( running stable with 1 x 2048MB at 3.61ghz @22°C ):

AI overclock tuner: Manual

CPU Ratio Setting: 9

FSB strap to Northbridge: 400mhz

FSB freq: 400

PCIE freq: 115

DRAM freq: DDR3-1600

Dram command rate: 2N

Dram clk channel A: Auto

Dram clk channel B: Auto

Dram Timings: 8-8-8-24 ( rest auto )

Dram Static read control: Auto

Dram dynamic read control: Auto

AI clock twister: Strong

AI transaction Booster: Enabled

Boost level: 2

CPU Voltage: 1.475

CPU PLL Voltage: 1.6

FSB Termination Voltage: 1.5

Dram Voltage: 1.66 ( i know corsair says 1.65 but my Mobo only allows 1.64 or 1.66 )

NB Voltage: 1.61

SB Voltage: Auto

Clock over-charging Voltage: Auto

Loadline Calibration: disable

CPU GTL voltage reference: Auto

NB GTL volatage reference: Auto

CPU Spread Spectrum: Disabled

Pcie spread spectrum: Disabled

C1E support: Disabled

 

Tests:

SupiPi with the stable setup

1M = 15sec

32M = 15min

Orthos stressing = 5h and running

 

Conslusion = Stable enough :-)

 

But then I add another 2048MB and now the setup sucks. It Crashes, Errors, ...

Now I tested the rams by using them one by one and they all give me a stable system... memtest is also ok

 

I also tried with the (2x2048MB) and the enter a higher Ram voltage ( 1.7 / 1.8 / 1.9 ) but this did not help at all. Crashes faster or wont even boot.

I also tried to disable the AI clock twister and The Transaction Booster and then at 1.66 but even then the system does not work properly

 

Any idea on what could help me ? or what i can adapt in my setup?

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You need to set your PCI-e to 100Mhz. You are way to far and the only reason for an increase in PCI-e is to stabilize very high overclocks of which you are nowhere near.

 

Secondly, there is an issue with X38/X48 chipsets and high density memory. 128M X 16 = 2GB modules of high speed DDR3 memory are not liked by these chipsets.

 

As well, if you are using more than two slots, lower the bandwidth to 1333Mhz. You might have to do this even with 2 modules as those boards do not like high density memory. Put the memory in the second and fourth slots. Lower the PCI-e to 100Mhz. If your memory is the triple channel memory for i7, then you have to keep in mind that this memory has NOT been tested or validated for the Core 2 and even though the memory is rated for 1.65v, this is on the i7 platform and the on motherboard memory controller of your board needs to have more juice coming at that speed. Now I don't mean the voltage of the memory controller, I mean the voltage of the memory. You are warranted for up to and including 2.0v on that memory. There's really no use in going higher than 1.8v though. So, I advise you to set your voltage to 1.7 - 1.8v and retest. Set AI Clock Twister to Auto. Set the Northbridge to 1.25v. You are going to burn that chipset out with 1.61v.

 

Memtest with a single module in slot 2. Then remove the stick and Memtest with a single module in slot 4. Finally, test with a module in slot 2 and slot 4.

Download Memtest86+ V2.11 from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.

Download CPU-z from
.

When assured of stable DRAM, then enter Windows and Run CPU-z and post screenshots of CPU-z's CPU, Memory and SPD tabs.

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As well, if you are using more than two slots, lower the bandwidth to 1333Mhz..

 

This means going back to 3Ghz ? so actually just the stock speeds ? and even lowering the standard ram frequency ? Then basicly a OC isnt possible here..

 

CPU Ratio Setting: 9

FSB strap to Northbridge: 333mhz

FSB freq: 333

PCIE freq: 100

DRAM freq: DDR3-1333

 

 

You are going to burn that chipset out with 1.61v

 

Maybe then i'll get the approval of my gf to go and get me the new i7 and a new mobo lol :-)

 

 

Memtest with a single module in slot 2...

 

I'll do this tonight or tomorrow but allready thanks !

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For those who wish to pump inordinate voltages through their hardware, they can find another site such as http://www.xtremesystems.org

 

You won't get much help when you are DRIVING such voltages through your system.

 

I would set two modules to the second and fourth slot and use these settings as a base. Do not use a 400Mhz strapping as it is wonky on these chipsets.

 

AI overclock tuner: Manual
CPU Ratio Setting: 9
FSB strap to Northbridge: 333mhz
FSB freq: 400
PCIE freq: 100
DRAM freq: DDR3-1600
Dram command rate: 2N
Dram clk channel A: Auto
Dram clk channel B: Auto
Dram Timings: 8-8-8-24 ( rest auto )
Dram Static read control: Auto
Dram dynamic read control: Auto
AI clock twister: Auto
AI transaction Booster: Auto
CPU Voltage: 1.3675v
CPU PLL Voltage: 1.55v
FSB Termination Voltage: 1.2v
Dram Voltage: 1.75v
NB Voltage: 1.25v
SB Voltage: Auto
Clock over-charging Voltage: Auto
Loadline Calibration: Enabled
CPU GTL voltage reference: Auto
NB GTL volatage reference: Auto
CPU Spread Spectrum: Disabled
Pcie spread spectrum: Disabled
C1E support: Disabled

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AI overclock tuner: Manual
CPU Ratio Setting: 9
FSB strap to Northbridge: 333mhz
FSB freq: 400
PCIE freq: 100
DRAM freq: DDR3-1600
Dram command rate: 2N
Dram clk channel A: Auto
Dram clk channel B: Auto
Dram Timings: 8-8-8-24 ( rest auto )
Dram Static read control: Auto
Dram dynamic read control: Auto
AI clock twister: Auto
AI transaction Booster: Auto
CPU Voltage: 1.3675v
CPU PLL Voltage: 1.55v
FSB Termination Voltage: 1.2v
Dram Voltage: 1.75v
NB Voltage: 1.25v
SB Voltage: Auto
Clock over-charging Voltage: Auto
Loadline Calibration: Enabled
CPU GTL voltage reference: Auto
NB GTL volatage reference: Auto
CPU Spread Spectrum: Disabled
Pcie spread spectrum: Disabled
C1E support: Disabled

 

This with one in dimm2 and one in dimm4 just wont boot at all..

I also tried to use dram volatages 1.66 / 1.7 / 1.8 / 1.85 but they dont work

 

I'll check tonight again and test with one in dimm2 and see if i get that to work. Thx

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Try singly with each module as well. Test with one in slot 2, remove it and put the second one in slot 2 and finally the third one in slot 2.

 

Finally test with one in slot 2 and slot 4. I would not use the third one as it is not advised to do so for speed or stability. Please follow my instructions and post the results such as:

 

 

Single Mode

  • Stick 1 - Slot 2 = Pass/Fail
  • Stick 1 - Slot 4 = Pass/Fail
     
  • Stick 2 - Slot 2 = Pass/Fail
     

Dual Mode

 

  • Stick 1 & 2 - Slot 2 & 4 = Pass/Fail

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Hi DerekT,

 

Im back, but not with results of the tests

I buyed me some new gear

 

asus rampage 2 extreme

i7 920 ( running on 4.02ghz ) -> dimms are ok now on 1602mhz

and as a cooler a got a coolermaster v8

 

everything runs smoothly but im wondering.. what are your temps of the i7 ?

 

 

coolermaster cosmos type s + coolermaster v8

idle = 40

stressing = up to 80 and more

 

any ideas how to get the temps down more on this oc ?

- lapping ?

- vapochill ( im considering..ive read theres a 1366socket attach so.. )

- other recomendations for a cooler ?

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This is pretty common. Are you running with HT enabled? If so, you can drop ~12C just by disabling your HT. Otherwise, with an air cooler, I suggest a drop to 180 BCLKC and manually set the multiplier to 21 and enabled HT. (newest BIOS allows this). Then enter CPU management in the BIOS and set C-State to Enable and C6.

 

I run 33/34/36/34 idle and 78/80/79/78C load.

 

Hi DerekT,

 

Im back, but not with results of the tests

I buyed me some new gear

 

asus rampage 2 extreme

i7 920 ( running on 4.02ghz ) -> dimms are ok now on 1602mhz

and as a cooler a got a coolermaster v8

 

everything runs smoothly but im wondering.. what are your temps of the i7 ?

 

 

coolermaster cosmos type s + coolermaster v8

idle = 40

stressing = up to 80 and more

 

any ideas how to get the temps down more on this oc ?

- lapping ?

- vapochill ( im considering..ive read theres a 1366socket attach so.. )

- other recomendations for a cooler ?

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This is pretty common. Are you running with HT enabled? If so, you can drop ~12C just by disabling your HT. Otherwise, with an air cooler, I suggest a drop to 180 BCLKC and manually set the multiplier to 21 and enabled HT. (newest BIOS allows this). Then enter CPU management in the BIOS and set C-State to Enable and C6.

 

I run 33/34/36/34 idle and 78/80/79/78C load.

 

Thanks. I disabled HT, enabled c6 but i kept the 20x200ratio +turbo on => im running with aircooling in idle state arround 31-34-32-30

 

thanks for the fast -10°C trick :-)

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because of the fact that the coolermaster V8 wont fir in the Cosmos S with side fan.. i needed to remove the cooler first.

 

today i took some craftsman tools and readded the sidefan of the cosmos S. now OC at 4.02ghz running idle at 25°C with i7... looks great :) its still not my 17°C with my zalman 9700 and the core 2 duo but we are looking good :-)

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Why would you disable HT? That's a big + for i7 especially when playing games! I think were going backwards here?

 

Especially when playing games? Are you serious? Games are becoming quite a bit more multithreaded, but there isn't much out there that can utilize 4 cores, let alone 8 threads, and most applications that can are encoders or deal with video work, etc. Nothing that would benefit a gamer whatsoever. There are few apps that use many cores efficiently, and media transcoding is one of them. If you want to set x264 video transcoding and it will show you the benefit of HT if it exists.

 

HT Off

   * 3DMark Vantage CPU: 15374
   * Crysis Warhead: 119.59
   * Far Cry 2: 176.78
   * CineBench 10: 13617

HT On

   * 3DMark Vantage CPU: 20617 (+ 34.1%)
   * Crysis Warhead: 118.72 (- 0.7%)
   * Far Cry 2: 167.90 (- 5.0%)
   * CineBench 10: 15875 (+ 16.6%)

Gamers, disable HT.
Video encoders & very heavy multi-taskers, leave HT on

 

Source

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Didn't you read the link? Games are not showing increases, rather decreases with HT. As well, a good 10 - 15C drop on load temps will allow increases in CPU speed. I can make 4.0Ghz with 78C and HT disabled. With HT enabled, it is 90+C.

 

So, for gamers....

 

Ok LOL it's for multitasking really but still why would you disable it? That's like a + already.
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