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Discussion Starter #1
When I run LinX instead of it pushing my CPU to a constant 100% it will sometimes drop CPU usage down to 12%. I have all power saving options disabled (I think) And my cpu temps don't pass 85C. So basically, is LinX supposed to fluctuate that much, or is it supposed to run the CPU at 100% all the time? For me Prime 95 runs at 100% all the time.
 

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Discussion Starter #3
Ah, thank you for the quick reply! Also since you must use LinX yourself I was wondering something. I get blue screens when my computer needs more voltage and prime 95 takes atleast 5 hours on blend to blue screen, is linX any faster? It really sucks having to wait 5 hours just to get a blue screen telling me to increase voltage and then try again.
 

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LinX is much harder on your chip than P95. It can present helpful (lol) BSoD's in a fraction of the time. Beware that it also generates significantly more heat. I recommend leaving RealTemp up and coming back to monitor its temperatures every 5-10 minutes.
 

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Discussion Starter #7
Out of curiosity, how many runs of LinX is good for preliminary stability testing? Because I have passed 20 runs of LinX but failed at 5.5 hours of Prime 95 blend.
 

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It's all a matter of how stable you want your computer to be. I'm a big fan of LinX and prefer to run at least an hour (however many runs that may be). 20 runs and five and a half hours of P95 will probably be enough for just gaming, web browsing, etc. Still, no harm in giving it one more step up in Vcore. That'd probably have you just right!
 

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Discussion Starter #10
CPU: 1.3625
DRAM Bus Voltage: 1.66
QPI/DRAM Core VOlt: 1.36875

For me my Vcore constantly needs more voltage as I increase my QPI voltage. And I can never seem to have enough QPI voltage.

My main questions is, aren't these voltages just a little extreme for just 3.7GHz on an i7 920? I see people using C0 chips like me who run fine with 1.35Vcore MAX @ 3.8GHz.

And here I am using my above voltages at 3.7GHz and can't seem to get more than 5.5 hours stable in blend. Since my BSOD's keep asking for more QPI voltage is it possible my RAM just sucks?
 

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Can you post your entire BIOS template? I don't have any experience with C0's, but have you tried downclocking your RAM and seeing if that helps? There's a plethora of possibilities, but a review of your current configuration would really help!
 

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Discussion Starter #13
AI Tweaker:

Ai Overclock Tuner: [Manual]
CPU Ratio Settings: [Auto]
Intel (R) SpeedStep (TM) Tech: [Disabled]
BCLK Frequency [185]
PCIE Frequency [100]
DRAM Frequency [1483MHz]
UCLK Frequency [Auto]
QPI Link Data Rate [Auto]

CPU Voltage: 1.36250
CPU PLL Voltage: Auto
QPI/DRAM Core Voltage: 1.36875
IOH Voltage: Auto
IOH PCIE Voltage: Auto
ICH Voltage: Auto
DRAM Bus Voltage: 1.66
DRAM DATA REF Voltage on CHA: Auto
DRAM CTRL REF Voltage on CHA: Auto
DRAMA DATA REF Voltage on CHB: Auto
DRAM CTRL REF Voltage on CHB: Auto
DRAM DATA REF Voltage on CHC: Auto
DRAM CTRL REF Voltage on CHC: Auto
*******************************************
Load-Line Calibration: Auto
CPU Differential Amplitude: Auto
CPU Clock Skew: Auto
CPU Spread Spectrum: Auto
IOH Clock Skew: Auto
PCIE Spread Spectrum: Auto

DRAM Timing Control:

1st Information: 7-7-7-20-5-74-11-7-20-0

DRAM CAS# Latency: 7 DRAM Clock
DRAM RAS# to CAS# Delay: 7 DRAM Clock
DRAM RAS# ACT Time: 20 DRAM Clock
DRAM RAS# to RAS# Delay: Auto
DRAM REF cycle Time: Auto
DRAM Write Recovery Time: Auto
DRAM READ to PRE Time: Auto
DRAM FOUR ACT WIN Time: Auto
DRAM Back-To-Back CAS# Delay: Auto
2nd Information: 1N-56-58-60
DRAM Timing Mode: 1N
DRAM Round Trip Latency on CHA: Auto
DRAM Round Trip Latency on CHB: Auto
DRAM Round Trip Latency on CHC: Auto
3rd Information: 7-7-16-8-8-9-7-6-4-7-7-4
DRAM WRITE To READ Delay (DD): Auto
DRAM WRITE To READ Delay (DR): Auto
DRAM WRITE To READ Delay (SR): Auto
DRAM READ To Write Delay(DD): Auto
DRAM READ To Write Delay(DR): Auto
DRAM READ To Write Delay(SR): Auto
DRAM READ To READ Delay (DD): Auto
DRAM READ To READ Delay (DR): Auto
DRAM READ To READ Delay (SR): Auto
DRAM WRITE To WRITE Delay (DD): Auto
DRAM WRITE To WRITE Delay (DR): Auto
DRAM WRITE To WRITE Delay (SR): Auto

CPU Configuration:

CPU Ratio Setting: Auto
C1E Support: Disabled
Hardware Prefetcher: Enabled
Adjacent Cache Line Prefetch: Enabled
MPS and ACPI MADT ordering: Modern ordering
Intel (R) Virtualization Tech: Enabled
CPU TM Function: Disabled
Execute Disable Bit: Enabled
Intel (R) HT Technology: Enabled
Active Processor Cores: All
A20M: Disabled
Intel (R) SpeedStep(TM) Tech: Disabled
Intel (R) C-STATE Tech: Disabled
 

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Alright, I've highlighted changes you ought to try out!

Ai Overclock Tuner: [Manual]
CPU Ratio Settings: [21x]
Intel (R) SpeedStep (TM) Tech: [Disabled]
BCLK Frequency [176]
PCIE Frequency [101]
DRAM Frequency [1408MHz]
UCLK Frequency [2816MHz]
QPI Link Data Rate [6336MT/s]

CPU Voltage: 1.36250v
CPU PLL Voltage: 1.88v
QPI/DRAM Core Voltage: 1.36875v
IOH Voltage: 1.2v
IOH PCIE Voltage: 1.5v
ICH Voltage: 1.1v
DRAM Bus Voltage: 1.66
DRAM DATA REF Voltage on CHA: Auto
DRAM CTRL REF Voltage on CHA: Auto
DRAMA DATA REF Voltage on CHB: Auto
DRAM CTRL REF Voltage on CHB: Auto
DRAM DATA REF Voltage on CHC: Auto
DRAM CTRL REF Voltage on CHC: Auto
*******************************************
Load-Line Calibration: Enabled
CPU Differential Amplitude: 800mV
CPU Clock Skew: Normal
CPU Spread Spectrum: Disabled
IOH Clock Skew: Normal
PCIE Spread Spectrum: Disabled

DRAM Timing Control:

1st Information: 7-7-7-20-5-74-11-7-20-0

DRAM CAS# Latency: 7 DRAM Clock
DRAM RAS# to CAS# Delay: 7 DRAM Clock
DRAM RAS# ACT Time: 20 DRAM Clock
DRAM RAS# to RAS# Delay: Auto
DRAM REF cycle Time: Auto
DRAM Write Recovery Time: Auto
DRAM READ to PRE Time: Auto
DRAM FOUR ACT WIN Time: Auto
DRAM Back-To-Back CAS# Delay: Auto
2nd Information: 2N-56-58-60
DRAM Timing Mode: 2N
DRAM Round Trip Latency on CHA: Auto
DRAM Round Trip Latency on CHB: Auto
DRAM Round Trip Latency on CHC: Auto
3rd Information: 7-7-16-8-8-9-7-6-4-7-7-4
DRAM WRITE To READ Delay (DD): Auto
DRAM WRITE To READ Delay (DR): Auto
DRAM WRITE To READ Delay (SR): Auto
DRAM READ To Write Delay(DD): Auto
DRAM READ To Write Delay(DR): Auto
DRAM READ To Write Delay(SR): Auto
DRAM READ To READ Delay (DD): Auto
DRAM READ To READ Delay (DR): Auto
DRAM READ To READ Delay (SR): Auto
DRAM WRITE To WRITE Delay (DD): Auto
DRAM WRITE To WRITE Delay (DR): Auto
DRAM WRITE To WRITE Delay (SR): Auto

CPU Configuration:

CPU Ratio Setting: 21x
C1E Support: Disabled
Hardware Prefetcher: Enabled
Adjacent Cache Line Prefetch: Enabled
MPS and ACPI MADT ordering: Modern ordering
Intel (R) Virtualization Tech: Disabled (unless you run VMs)
CPU TM Function: Disabled
Execute Disable Bit: Disabled (unless you run a server)
Intel (R) HT Technology: Enabled
Active Processor Cores: All
A20M: Disabled
Intel (R) SpeedStep(TM) Tech: Disabled
Intel (R) C-STATE Tech: Disabled
 

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Discussion Starter #18
Ok 20 passes of LinX was successful.

Real Temp 3.0 recorded my max temps as: 87 83 81 81

I just reseated my HS the other day so my Arctic Silver 5 has not had time to cure yet. So my temps should go down.

Also those changes that I made, especially to the loan line calibration, is it possible I can lower my vcore down?
 

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Discussion Starter #20
Well the term "sufficient" in overclocking is more of a matter of opinion I have found. For example the 20 runs of linx I ran might make my computer "stable" in some peoples eyes, but in others if my computer doesn't do atleast 500 runs its not stable. This difference in acceptability has been one of the major reasons for this overclock to be taking so long.

Just out of curiosity since you seem very knowledgeable mymlan and have touched on this before. All I do is gaming and web browsing. On very rare occasional I will convert movies. What would be a sufficient test to show that my system is "stable" for what I use it for?
 
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