Overclock.net › Forums › Intel › Intel CPUs › Seriously need help with this - i7 920 C0
New Posts  All Forums:Forum Nav:

Seriously need help with this - i7 920 C0

post #1 of 11
Thread Starter 
I've been trying to overclock my core i7 920 for the past week now using OCCT, Prime95, Intel Burn Test and LinX to test stability. I started with 4GHz and managed to get it stable with 1.4V Vcore and 1.34V QPI/VTT. I was able to run 9 hours of OCCT without an error, Prime95 would go on for hours in Small FFT and Blend mode.

When I finally started to use the system for what it's intended (playing Battlefield Bad Company 2) it froze up on me.

I always got either a 0x101 or 0x124 BSOD code meaning I had to up the Vcore or up the QPI/VTT voltage. I decided to settle for 3.9GHz with a lower BCLK @ 1.34V QPI/VTT and 1.4V Vcore. I ran all the usual stability test and passed them all without errors... untill I ran BFBC2. I always got the 0x124 BSOD code which means I have to either increase or decrease the QPI/VTT voltage (in most cases) or increase or decrease the Vcore when QPI/VTT is not the problem.

I settled for 3.8GHz with the following settings to make sure my Vcore was not the culprit for the instability issues.

- Vcore = 1.4V
- QPI/VTT = 1.30V
- BCLK = 181MHz
- Multiplier = x21 (to increase stability over the x20 multi)
- CPU/PLL = 1.800V
- RAM = Auto (1.5V - 1.54V)

- Memory multi: x6 = 1086 MHz (stock = 1333MHz)
- QPI Link Speed: x36 = 6.5GHz
- Uncore requency: x13 = 2.3GHz

I turned off ALL power saving features (EIST, SpeedStep, C1E, C3/C6/C7)
Load Line Calibration is enabled

These settings should be more than enough for 3.8GHz on a C0 chip so I started using BFBC2 as stability tester because it would freeze on me within 25 minutes of gaming whereas all the other software would show passes after 9+ hours.

I kept getting the 0x124 error so I started increasing the QPI/VTT from 1.30V all the way up to 1.5V!!! in steps of 0.02V Obviously at 1.5V I excluded the QPI/VTT from my possible culprit list.

So I then put my QPI/VTT back to 1.34V as this is the max I am comfortable with. To increase stability I turned up CPU/PLL from 1.8 to 1.88V, turned off Turbo mode to x20 multi and kept the 181MHz BCLK so I am now running at 3.6GHz with the following settings:

- CPU/PLL = 1.88V
- QPI/VTT = 1.34V
- Vcore = 1.4V
- DRAM = auto

All power saving features OFF and Turbo mode off (HT is always disabled)

- Uncore Frequency = 2.3GHz (x13)
- QPI Link Speed = 6.5GHz (x36)
- Memory = 1086MHz (x6)

With these settings I passed 3 hours of Linx, 4 hours of Prime95, 15 IBT loops but it crashed on me after 20 minutes of BFBC2 with ... the same 0x124 error

So this is what I excluded from my list so far:

- not Vcore
- not QPI/VTT
- not CPU/PLL
- not temperature related (am watercooled with a x480 rad)

So what the hell is causing this 124 BSOD?? I have no previous experiences with overclocking but I started wondering why only BFBC2 would crash the system so fast. It's ot BFBC2 related (I think) because it used to run 100% stable and never crashed on me with stock clocks/voltages.

The only thing left, that BFBC2 stresses but the other stability testers don't so much is RAM. I believe this is a bit of a stretch but oh well, I'm kind of desperate.

The RAM is already running under specs (1086MHz instead of 1333MHz) voltages for the RAM are left on auto so this shouldn't be an issue. Timings are left on auto as well. Because I wanted to exclude the RAM from my list too I ramped up the voltage to 1.64V and manually set the timings in the BIOS to 9/9/9/24

I am using cheap DDR3 1333MHz Kingston Valueram (3 x 2GB)

I am now going to play BFBC2 again but I am not expecting much tbh. I have absolutely no clue as to what could be causing these crashes but maybe someone here does?

Thanks in advance


Edit:

My system specs:

- Gigabyte X58 UD4P
- Kingston Valueram 1333MHz (3 x 2GB)
- Core i7 920 C0/C1
- OCZ 500W ModXStream power supply
- HD5850 (not overclocked)

- Custom watercooling loop

Temps never exceed 67°C. 67°C is the max temp I registered with IBT. Prime95 never exceeds 65°C and LinX doesn't go above 61°C
Edited by TJ Tom - 10/2/11 at 6:34am
post #2 of 11
C0 chips are horrid overclockers. So i really doubt youll get 4ghz or even close to it stable. I wouldnt think it would be ram as prime 95 would pick that up. My guess might be to look at that 500watt power supply. Its enough for your system at stock but when overclocked it might not be supplying enough power.

My reasoning for this? Your cpu and ram is stable under stress as shown through prime 95 but you still get bsod crashes indicating unstable cpu/ram. The only hardware that prime 95 does stress at the same time as your cpu is your HD5850. Im guessing that in games your hd5850 is pulling all the power and all the sudden your cpu clock is not stable.
Finally Finished!
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 3930K Batch: 3135B495T Gigabyte X79 UD7 GTX 570 3-way SLi Corsair Vengeance 1600mhz CL9 
Hard DriveCoolingOSMonitor
60GB OCZ Vertex II / 3x 500GB Samsung Spinpoint EK Supreme HF Nickel, EK DCP4.0, Stealth GT 360... Windows 7 Ult 64bit Acer 22" G225HQ 
KeyboardPowerCaseMouse
Razor Lacosa Mirror Edition Silverstone Strider 1500w  Aerocool X-Preditor  CM Storm Sentinel Advanced 
Mouse Pad
Razer Goliathus Speed edition 
  hide details  
Reply
Finally Finished!
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 3930K Batch: 3135B495T Gigabyte X79 UD7 GTX 570 3-way SLi Corsair Vengeance 1600mhz CL9 
Hard DriveCoolingOSMonitor
60GB OCZ Vertex II / 3x 500GB Samsung Spinpoint EK Supreme HF Nickel, EK DCP4.0, Stealth GT 360... Windows 7 Ult 64bit Acer 22" G225HQ 
KeyboardPowerCaseMouse
Razor Lacosa Mirror Edition Silverstone Strider 1500w  Aerocool X-Preditor  CM Storm Sentinel Advanced 
Mouse Pad
Razer Goliathus Speed edition 
  hide details  
Reply
post #3 of 11
OK it passes stability, that means your stable, there must be some other issue. Maybe a power issue. When playing BBC2 your not only working out your CPU but your using lots of power to run your card. If your computer shut down I would say you have a faulty PSU. But this is not the case. Do you have four pin or Eight pin power for your CPU? also try to run memtest for each module
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 920@4.0GHz Asus P6X58D-Premium ATI Radeon HD5870 12GB Crutial 1600MHz 
Hard DriveOptical DriveCoolingOS
3 Seagate barracuda 1T LG BR Burner Koolance Windows 8 Pro x64 with Media Center  
MonitorKeyboardPowerCase
RCA 27inch Logitech G15 Ultra X4 1050 watt Corsair Obsidian 800d 
Mouse
Logitech G15 
  hide details  
Reply
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 920@4.0GHz Asus P6X58D-Premium ATI Radeon HD5870 12GB Crutial 1600MHz 
Hard DriveOptical DriveCoolingOS
3 Seagate barracuda 1T LG BR Burner Koolance Windows 8 Pro x64 with Media Center  
MonitorKeyboardPowerCase
RCA 27inch Logitech G15 Ultra X4 1050 watt Corsair Obsidian 800d 
Mouse
Logitech G15 
  hide details  
Reply
post #4 of 11
Thread Starter 
I will run memtest for each module and see what that brings to the table. I'll test for stability tomorrow and post back. Could it really be powersupply related? I thought a PC would just shut off when there's insufficient power and not give hardware related BSOD errors. Anyway, I could be wrong. I also thought an overclocked i7 system with graphics card didn't exceed 450 Watts, I even think it was somewhere around 400 Watts. I'll do a little more research on that too.

Thanks for the replies so far!

I have a 8 pin CPU connector by the way and @ Kal777:

I was running 3.8GHz and now 3.6GHz and I still get error messages. C0 are bad overclockers, yes, but they should be able to do 3.6GHz right?


Edit:

I'm not a fan of buying 1200 Watt powersupplies for dual videocard set-ups as people tend to WAY overestimate the powerconsumption of their system. I believe tomshardware has reliable reviews and according to their i7/Phenom review:

- HD4870X2
- Core i7 @ 3.8GHz
- Gigabyte X58 DS4
- 6GB ram (3x2GB)

running Prime95 and 3Dmark vantage simultaneously draws about 435 Watts from the wall which is about ~400 Watts for the actual system so 500 Watts should suffice? It's a powersupply from OCZ so it's not a B-brand or no name whatsoever.

Link:
http://www.tomshardware.com/reviews/...ii,2119-9.html
Edited by TJ Tom - 10/2/11 at 3:31pm
post #5 of 11
Thread Starter 
Running @ 3.6GHz with Base clock of 180MHz and x20 multiplier.

Vcore = 1.4V
QPI/VTT = 1.26V

-> BSOD

I now further decreased the QPI/VTT voltage from 1.26 to 1.16V

If increasing it all the way to 1.5V doesn't help, maybe decreasing will?

Also ran Memtest86+ for 50 minutes, no errors detected.

Maybe the powersupply is not good enough after all? I would like to know for sure before I go and buy a 230 euro's PSU.
post #6 of 11
If your temps are fine raise your Vcore and VTT to 1.45 and 1.35.

Lowering voltage doesn't increase stability, it only reduces heat.

If this doesn't work try a different multiplier.
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
post #7 of 11
Quote:
Originally Posted by MinitroN View Post
If your temps are fine raise your Vcore and VTT to 1.45 and 1.35.

Lowering voltage doesn't increase stability, it only reduces heat.

If this doesn't work try a different multiplier.


My setup I get BSOD when I set the vcore to 1.38-9 but when I set
to 1.4 no more BSODs and stable. Can you tell me how would I lower my
voltage without getting BSOD? Also, with 4.4Ghz ht on I get 32-40 idle
and 82 during load.


Also, 1.45 vcore for 4Ghz OC'd is too high!!
Edited by dhenzjhen - 10/3/11 at 11:43am
Athena
(14 items)
 
Achilles
(9 items)
 
 
CPUMotherboardGraphicsHard Drive
[Intel] i5 2500k  [ASUS] p8p67 Evo B3 [EVGA] GTX 680 [Samsung] 1TB 
CoolingOSMonitorKeyboard
[Noctua] NH-D14 [Micro$oft] Win7 64-bit/Linux [HP] 2311x [Logitech] G510 
PowerCaseMouse
[XFX] 650W [Cooler Master] HAF X [Logitech] G400 
CPUMotherboardGraphicsRAM
990X 6.5Ghz EVGA X58 3 way SLI classified XFX GT 240/modded 8800GTS/8800GTX/5870/4980/FIR... Corsair Dominator PSC  
CoolingOSMonitorCase
F1 Extreme Dark, DICE and LN2!! XPeeeee and Win 7 Old CRT Open 
  hide details  
Reply
Athena
(14 items)
 
Achilles
(9 items)
 
 
CPUMotherboardGraphicsHard Drive
[Intel] i5 2500k  [ASUS] p8p67 Evo B3 [EVGA] GTX 680 [Samsung] 1TB 
CoolingOSMonitorKeyboard
[Noctua] NH-D14 [Micro$oft] Win7 64-bit/Linux [HP] 2311x [Logitech] G510 
PowerCaseMouse
[XFX] 650W [Cooler Master] HAF X [Logitech] G400 
CPUMotherboardGraphicsRAM
990X 6.5Ghz EVGA X58 3 way SLI classified XFX GT 240/modded 8800GTS/8800GTX/5870/4980/FIR... Corsair Dominator PSC  
CoolingOSMonitorCase
F1 Extreme Dark, DICE and LN2!! XPeeeee and Win 7 Old CRT Open 
  hide details  
Reply
post #8 of 11
Quote:
Originally Posted by dhenzjhen View Post
My setup I get BSOD when I set the vcore to 1.38-9 but when I set
to 1.4 no more BSODs and stable. Can you tell me how would I lower my
voltage without getting BSOD? Also, with 4.4Ghz ht on I get 32-40 idle
and 82 during load.


Also, 1.45 vcore for 4Ghz OC'd is too high!!
The Vcore/VTT doesn't mean much if your temps are fine.

Voltage and stability are directly related to each other so lower voltage can lead to lower stability.

I would rather overvolt than undervolt as long as my temperatures are fine.
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-760 @ 3.91 1.4v/1.3v BIOSTAR T5 XE CFX-SLI GTX 460 SLi 850/1900 1.1v 8gb DDR3 @ 1860 
OSMonitorCase
Windows 7 Pro 1920x1080 HAF 912 
  hide details  
Reply
post #9 of 11
Quote:
Originally Posted by MinitroN View Post
The Vcore/VTT doesn't mean much if your temps are fine.

Voltage and stability are directly related to each other so lower voltage can lead to lower stability.

I would rather overvolt than undervolt as long as my temperatures are fine.


Yeah, but if possible lower stable vcore would result a happy procs
Athena
(14 items)
 
Achilles
(9 items)
 
 
CPUMotherboardGraphicsHard Drive
[Intel] i5 2500k  [ASUS] p8p67 Evo B3 [EVGA] GTX 680 [Samsung] 1TB 
CoolingOSMonitorKeyboard
[Noctua] NH-D14 [Micro$oft] Win7 64-bit/Linux [HP] 2311x [Logitech] G510 
PowerCaseMouse
[XFX] 650W [Cooler Master] HAF X [Logitech] G400 
CPUMotherboardGraphicsRAM
990X 6.5Ghz EVGA X58 3 way SLI classified XFX GT 240/modded 8800GTS/8800GTX/5870/4980/FIR... Corsair Dominator PSC  
CoolingOSMonitorCase
F1 Extreme Dark, DICE and LN2!! XPeeeee and Win 7 Old CRT Open 
  hide details  
Reply
Athena
(14 items)
 
Achilles
(9 items)
 
 
CPUMotherboardGraphicsHard Drive
[Intel] i5 2500k  [ASUS] p8p67 Evo B3 [EVGA] GTX 680 [Samsung] 1TB 
CoolingOSMonitorKeyboard
[Noctua] NH-D14 [Micro$oft] Win7 64-bit/Linux [HP] 2311x [Logitech] G510 
PowerCaseMouse
[XFX] 650W [Cooler Master] HAF X [Logitech] G400 
CPUMotherboardGraphicsRAM
990X 6.5Ghz EVGA X58 3 way SLI classified XFX GT 240/modded 8800GTS/8800GTX/5870/4980/FIR... Corsair Dominator PSC  
CoolingOSMonitorCase
F1 Extreme Dark, DICE and LN2!! XPeeeee and Win 7 Old CRT Open 
  hide details  
Reply
post #10 of 11
read this entire post and try the settings he lists in there. it helped me out a lot:
http://www.overclock.net/intel-cpus/...us-p6t-se.html
Chimera
(17 items)
 
  
CPUMotherboardGraphicsGraphics
i5 2500k 4.8Ghz ASUS P8Z68-v PRO GEN3 Evga gtx 580 3gb Evga gtx 580 3gb 
RAMHard DriveCoolingOS
8Gb Veangence ocz agility 3 watercooled Windows 7 Ultimate 64bit 
MonitorKeyboardPowerCase
d3 - 23" acer led monitors Logitech G15 1050W modular custom built from scratch case 
MouseAudioAudio
CM Inferno afterglow wireless 7.1 headphones w/ mic x-fi titanium soundcard 
  hide details  
Reply
Chimera
(17 items)
 
  
CPUMotherboardGraphicsGraphics
i5 2500k 4.8Ghz ASUS P8Z68-v PRO GEN3 Evga gtx 580 3gb Evga gtx 580 3gb 
RAMHard DriveCoolingOS
8Gb Veangence ocz agility 3 watercooled Windows 7 Ultimate 64bit 
MonitorKeyboardPowerCase
d3 - 23" acer led monitors Logitech G15 1050W modular custom built from scratch case 
MouseAudioAudio
CM Inferno afterglow wireless 7.1 headphones w/ mic x-fi titanium soundcard 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Seriously need help with this - i7 920 C0