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Help with minor adjustments for stabillity

post #1 of 4
Thread Starter 
Below is my rig, I am running my i7-875k at 170 x 22 =3740 Mhz bclk. (moderate overclock, not really for gaming anyway) Had this overclock stable for about a month now, but once in a while (every week or so) it would BSOD saying IRQL_NOT_LESS_OR_EQUAL. Couldn't get the exact code, but I am wondering if i need to tweak any of my settings.

Vcore- 1.218v
VTT - 1.192v
DRAM - 9-9-9-24-2T at 1.515v
QPI is at lowest setting

C1E/Turbo/Speedstep/spread spectrum are ALL off
Vdroop is disabled as well.

Rig sits nicely at 25~30 at idle and 65~70 at max load (has been stable after 12 hours of blend prime95 and 50 cycles of intelburntest.)

Just BSOD's usually when i enter games and such. Would i need to raise my voltages a bit? (people say it's quite low for such a voltage hungry cpu) or should I change my multiplier to an odd value? (i7's supposedly like odd multi?) or do I need to change settings with my ram or QPI. I'm wondering if my QPI is downclocked or something... Do i need to alter these settings to match my overclocked speeds?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-875k MSI P55-GD85 Asus TOP Fermi GTS450 + Gigabyte Fermi OC gts450 G.SKILL F3-12800CL9D-4GBRL Ripjaws PC3-12800 4GB 
Hard DriveOSPowerCase
Western Digital Caviar Black 1TB SATA3 6GB/S 7200R Windows 7 Ultimate 64bit Antec Truepower 750W modular power supply 80plus Antec 902 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-875k MSI P55-GD85 Asus TOP Fermi GTS450 + Gigabyte Fermi OC gts450 G.SKILL F3-12800CL9D-4GBRL Ripjaws PC3-12800 4GB 
Hard DriveOSPowerCase
Western Digital Caviar Black 1TB SATA3 6GB/S 7200R Windows 7 Ultimate 64bit Antec Truepower 750W modular power supply 80plus Antec 902 
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post #2 of 4
Quote:
Originally Posted by Xenos. View Post
Below is my rig, I am running my i7-875k at 170 x 22 =3740 Mhz bclk. (moderate overclock, not really for gaming anyway) Had this overclock stable for about a month now, but once in a while (every week or so) it would BSOD saying IRQL_NOT_LESS_OR_EQUAL. Couldn't get the exact code, but I am wondering if i need to tweak any of my settings.

Vcore- 1.218v
VTT - 1.192v
DRAM - 9-9-9-24-2T at 1.515v
QPI is at lowest setting

C1E/Turbo/Speedstep/spread spectrum are ALL off
Vdroop is disabled as well.

Rig sits nicely at 25~30 at idle and 65~70 at max load (has been stable after 12 hours of blend prime95 and 50 cycles of intelburntest.)

Just BSOD's usually when i enter games and such. Would i need to raise my voltages a bit? (people say it's quite low for such a voltage hungry cpu) or should I change my multiplier to an odd value? (i7's supposedly like odd multi?) or do I need to change settings with my ram or QPI. I'm wondering if my QPI is downclocked or something... Do i need to alter these settings to match my overclocked speeds?
sounds like an imc issue, or unstable ram overclock/timings. is your ram overclocked? if so what are the stock settings of your ram, and what are the overclocked settings of your ram.

if your ram isnt overclock, or you know for fact its stable, try increasing the vtt 1 notch and see if that helps. if it doesnt increase it another notch.

also try 181x21 see if that helps.

also id recommend running blend in prime95 for 24 hours. ive had worker threads fail after the 12 hours mark.
Edited by AliceInChains - 1/1/11 at 5:44pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
  hide details  
Reply
post #3 of 4
Thread Starter 
Ram is stock settings at 9-9-9-24-2T (this is the factory settings)... it is supposed to be at 1.5v but i gave it a little juice to 1.515v lol.

Increasing the VTT by 1 notch... meaning to increase my voltage by 0.1v? or just by the notch in which my motherboard increases (sorry new to this stuff haha).

i will try out with 181x21 to see if it will get rid of it. I'm wondering though... whats the difference between increasing Bclk/multiplier... which one is "better" overall? since my CPU is unlocked i would rather take the advantage of raising the multiplier but what's the stable option?
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-875k MSI P55-GD85 Asus TOP Fermi GTS450 + Gigabyte Fermi OC gts450 G.SKILL F3-12800CL9D-4GBRL Ripjaws PC3-12800 4GB 
Hard DriveOSPowerCase
Western Digital Caviar Black 1TB SATA3 6GB/S 7200R Windows 7 Ultimate 64bit Antec Truepower 750W modular power supply 80plus Antec 902 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-875k MSI P55-GD85 Asus TOP Fermi GTS450 + Gigabyte Fermi OC gts450 G.SKILL F3-12800CL9D-4GBRL Ripjaws PC3-12800 4GB 
Hard DriveOSPowerCase
Western Digital Caviar Black 1TB SATA3 6GB/S 7200R Windows 7 Ultimate 64bit Antec Truepower 750W modular power supply 80plus Antec 902 
  hide details  
Reply
post #4 of 4
Quote:
Originally Posted by Xenos. View Post
Ram is stock settings at 9-9-9-24-2T (this is the factory settings)... it is supposed to be at 1.5v but i gave it a little juice to 1.515v lol.

Increasing the VTT by 1 notch... meaning to increase my voltage by 0.1v? or just by the notch in which my motherboard increases (sorry new to this stuff haha).

i will try out with 181x21 to see if it will get rid of it. I'm wondering though... whats the difference between increasing Bclk/multiplier... which one is "better" overall? since my CPU is unlocked i would rather take the advantage of raising the multiplier but what's the stable option?
I would keep it ram at 1.5v. Im not sure what speed your ram is rated for, but you want to keep it at its stock speed or lower. For instance if you have 1600mhz ddr3 at 9-9-9-24, and your using a blck of 181 you want to use a multiplier of 8 instead of 10 which would be 1448mhz instead of 1810mhz. when you change the bclk always check what speed the ram is running at because changing the bclk will also change the speed of the ram. you will need to adjust the ram multiplier accordingly. its always best not to begin overclocking the ram until you have your cpu 100% stable. this way you can be sure to eliminate the ram as the cause of any instability.

Also increasing the bclk as apposed to increasing the multiplier will be best performance wise, but increasing the multiplier will be easier to maintain stability.

1 notch means 1 setting higher in the bios.

When running prime, generally when u get an error or a worker thread stops that means your vcore is too low. If you get a bluescreen it usually means your vtt is too low, or it could also mean your ram is unstable (if it's overclocked).

Also be sure to check it every now and again because if a worker thread stops or you get too many errors it can cause a blue screen, and can easily be mistaken as a problem with the vtt voltage instead of the vcore
Edited by AliceInChains - 1/1/11 at 6:47pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
2600k p8p67 deluxe reference gtx 680 Ripjaws(blue)1866, 8-9-8-24-2t 
Hard DriveOptical DriveOSMonitor
c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
KeyboardPowerCaseMouse
Lycosa Corsair 750w tx Cooler Master HAF 932 black g9 
  hide details  
Reply
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