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First Time Overclock Achieved

post #1 of 8
Thread Starter 
I finally overclocked my i7 870 to 4Ghz (4.02)! I'm posting this from my laptop, currently running 20 laps of LinX and then will hit prime95 for about 4 hours. Should be a great success hopefully! thumb.gif

I'll post some screen captures up when I can. Temps are looking a bit high (89-91C) but other than that it's been running steady on LinX for the past 50 minutes.

BCLK: 191
Multiplier: 21
CPU Vcore: 1.42
CPU VTT: 1.225
CPU PLL: 1.90

Best regards,
Mike
    
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post #2 of 8
Quote:
Originally Posted by PositiveKarma View Post

I finally overclocked my i7 870 to 4Ghz (4.02)! I'm posting this from my laptop, currently running 20 laps of LinX and then will hit prime95 for about 4 hours. Should be a great success hopefully! thumb.gif
I'll post some screen captures up when I can. Temps are looking a bit high (89-91C) but other than that it's been running steady on LinX for the past 50 minutes.
BCLK: 191
Multiplier: 21
CPU Vcore: 1.42
CPU VTT: 1.225
CPU PLL: 1.90
Best regards,
Mike

what frequency ram are you using ? Cpu Vcore is too high it shouldnt take more than 1.37v anyway. 91C is generally higher and Prime95 are more resource hungry so it may take your cpu 92~93 but unless you turned off Cpu thermal TM , ur cpu at least wont get burn as it sometimes will lower the frequency to keep it safe from melting down
post #3 of 8
Thread Starter 
Quote:
Originally Posted by sakibchy View Post

what frequency ram are you using ? Cpu Vcore is too high it shouldnt take more than 1.37v anyway. 91C is generally higher and Prime95 are more resource hungry so it may take your cpu 92~93 but unless you turned off Cpu thermal TM , ur cpu at least wont get burn as it sometimes will lower the frequency to keep it safe from melting down

RAM is 1333Mhz. I have the RAM voltage set to the manufacture's recommendation.

I might try dropping the clock down a bit and re running LinX to see if the temps are lower. I'll lower the VCore down to 1.37 then. I know 91C is a bit high and I wasn't too happy with it when I saw but we'll see.

Best regards,
Mike
Edited by PositiveKarma - 2/17/12 at 4:22pm
    
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post #4 of 8
Quote:
Originally Posted by PositiveKarma View Post

RAM is 1333Mhz. I have the RAM voltage set to the manufacture's recommendation.
I might try dropping the clock down a bit and re running LinX to see if the temps are lower. I'll lower the VCore down to 1.37 then. I know 91C is a bit high and I wasn't too happy with it when I saw but we'll see.
Best regards,
Mike

it would be better if i could know which motherboard you are using. Because sometimes same settings may be stable in one mobo but may not to another. For example, gigabyte sometimes increase the voltage slightly than the voltage you originally set in bios. But this goes opposite with asus. Anyway..... you may also try this and see if you can have a stable overclock ... because mine are also i7-870 @ 4Ghz and prime95, 9 hours stable. But i manage to keep below 82'C and in real world application it doesnt generally exceed 74'C .
My settings are
24x multiplier / 167 mhz blck.
ram = 2:8 @ 1336 mhz ( 9,9,9,24 1.5v )
Cpu PLL= 1.80v ( its better not to alter this but if you find it not stable then just increase 1.82~1.84v , not more than this.,.. or else temp would goes high )
Cpu vcore = 1.367
IMC= 1.21
LLC= Enable
All powersaving features are turned off except Cpu thermal function ...
Please let me know if this settings work with your system and if you manage to lower the voltage. Remember the reason we bought i7 (not i5 ) is max 24X cpu ratio which is good news for us , because it is always good to OC with higher ratio than increasing BLCK . And also make sure you set the lowest ratio for Qpi.... thus you will achieve A powerful 4Ghz system with safety and longibility
post #5 of 8
Thread Starter 
Quote:
Originally Posted by sakibchy View Post

it would be better if i could know which motherboard you are using. Because sometimes same settings may be stable in one mobo but may not to another. For example, gigabyte sometimes increase the voltage slightly than the voltage you originally set in bios. But this goes opposite with asus. Anyway..... you may also try this and see if you can have a stable overclock ... because mine are also i7-870 @ 4Ghz and prime95, 9 hours stable. But i manage to keep below 82'C and in real world application it doesnt generally exceed 74'C .
My settings are
24x multiplier / 167 mhz blck.
ram = 2:8 @ 1336 mhz ( 9,9,9,24 1.5v )
Cpu PLL= 1.80v ( its better not to alter this but if you find it not stable then just increase 1.82~1.84v , not more than this.,.. or else temp would goes high )
Cpu vcore = 1.367
IMC= 1.21
LLC= Enable
All powersaving features are turned off except Cpu thermal function ...
Please let me know if this settings work with your system and if you manage to lower the voltage. Remember the reason we bought i7 (not i5 ) is max 24X cpu ratio which is good news for us , because it is always good to OC with higher ratio than increasing BLCK . And also make sure you set the lowest ratio for Qpi.... thus you will achieve A powerful 4Ghz system with safety and longibility

Awesome man, I have to run out and get some tires for the stang today but when I get back I'll hop into the bios and try that out.

I'm running with EVGA's P55 SLI board right now.

Best regards,
Mike
    
CPUMotherboardGraphicsRAM
Intel I7-870 EVGA P55 SLI EVGA GTX 480 Corsair Vengeance 16GB (4x4GB) Series 
Hard DriveHard DriveHard DriveOptical Drive
WD 320GB Blue WD 1TB Green OCZ Vertex 4 512GB SSD LD DVD Burner 
CoolingCoolingCoolingCooling
Corsair H100 Hydroseries x2 Corsair SP 120mm Fan x2 Corsair 140mm AF Fan x6 Corsair 120mm AF Fan 
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Windows 7 Ultimate x64 Acer 22" LED Microsoft Sidewinder X4 Corsair HW850W 
Case
Corsair C70 Military Green 
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CPUMotherboardGraphicsRAM
Intel I7-870 EVGA P55 SLI EVGA GTX 480 Corsair Vengeance 16GB (4x4GB) Series 
Hard DriveHard DriveHard DriveOptical Drive
WD 320GB Blue WD 1TB Green OCZ Vertex 4 512GB SSD LD DVD Burner 
CoolingCoolingCoolingCooling
Corsair H100 Hydroseries x2 Corsair SP 120mm Fan x2 Corsair 140mm AF Fan x6 Corsair 120mm AF Fan 
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Windows 7 Ultimate x64 Acer 22" LED Microsoft Sidewinder X4 Corsair HW850W 
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post #6 of 8
Thread Starter 
It seems my BIOS won't allow me to set a 24x multiplier. thinking.gif
    
CPUMotherboardGraphicsRAM
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Hard DriveHard DriveHard DriveOptical Drive
WD 320GB Blue WD 1TB Green OCZ Vertex 4 512GB SSD LD DVD Burner 
CoolingCoolingCoolingCooling
Corsair H100 Hydroseries x2 Corsair SP 120mm Fan x2 Corsair 140mm AF Fan x6 Corsair 120mm AF Fan 
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Windows 7 Ultimate x64 Acer 22" LED Microsoft Sidewinder X4 Corsair HW850W 
Case
Corsair C70 Military Green 
  hide details  
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CPUMotherboardGraphicsRAM
Intel I7-870 EVGA P55 SLI EVGA GTX 480 Corsair Vengeance 16GB (4x4GB) Series 
Hard DriveHard DriveHard DriveOptical Drive
WD 320GB Blue WD 1TB Green OCZ Vertex 4 512GB SSD LD DVD Burner 
CoolingCoolingCoolingCooling
Corsair H100 Hydroseries x2 Corsair SP 120mm Fan x2 Corsair 140mm AF Fan x6 Corsair 120mm AF Fan 
OSMonitorKeyboardPower
Windows 7 Ultimate x64 Acer 22" LED Microsoft Sidewinder X4 Corsair HW850W 
Case
Corsair C70 Military Green 
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post #7 of 8
Quote:
Originally Posted by PositiveKarma View Post

It seems my BIOS won't allow me to set a 24x multiplier. thinking.gif

how come , i can do this in my Asus P55 !! Have you turned of Intel Speed Step Technology and turbo tech mode ?
post #8 of 8
for some reason you need to turn on Turbo Mode in order to increase the multiplier
if i turn off mine it will go back to stock, but if its on i can increase it
and i have a EVGA P55 FTW 200

with my older Asus MAXIMUS III Formula i had to turn it off to increase the multiplier

338

338
Edited by [T]yphoon - 2/19/12 at 4:47am
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