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i7 3820 - 4820 Overclock Club - Page 297

post #2961 of 6491
Quote:
Originally Posted by Bart View Post

Quote:
Originally Posted by X79Extreme7UK View Post

Hey my old mate smile.gif yeah everything is good, thanks ...been a bit away from virtual reality tongue.gif but I am back thumb.gif
Since you're back, would you mind explaining how you get your voltage so low?!?!? smile.gif MY 3820 gags on anything below 1.256V.

Hey Bart.....It is all to do with how lucky you get with your hardware. Motherboard, CPU, Ram interaction and especially how good your chip is. Mine can run every clock a lot below than average. For example; I can run 5000 around 1.384v, 5125 around 1.418v, 5200 around 1.464v and 5250 around 1.480v. Never tried 4.5Ghz. Only ran that clock as an answer to that question. So, it is all to do with how good the silicon is. I reckon this chip is not bad thumb.gif
post #2962 of 6491
Quote:
Originally Posted by Bart View Post

Since you're back, would you mind explaining how you get your voltage so low?!?!? smile.gif MY 3820 gags on anything below 1.256V.

Looks like he got a pretty damn good chip.

It took 1.252V to stabilize 4.5GHz for me. 1.250V failed Prime95 after 13 hours madsmiley.png
post #2963 of 6491
Quote:
Originally Posted by X79Extreme7UK View Post

Hey Bart.....It is all to do with how lucky you get with your hardware. Motherboard, CPU, Ram interaction and especially how good your chip is. Mine can run every clock a lot below than average. For example; I can run 5000 around 1.384v, 5125 around 1.418v, 5200 around 1.464v and 5250 around 1.480v. Never tried 4.5Ghz. Only ran that clock as an answer to that question. So, it is all to do with how good the silicon is. I reckon this chip is not bad thumb.gif

Lucky lucky dog! smile.gif
Quote:
Originally Posted by Snuckie7 View Post

Looks like he got a pretty damn good chip.

It took 1.252V to stabilize 4.5GHz for me. 1.250V failed Prime95 after 13 hours madsmiley.png
If I set mine to ANYTHING less than 1.256v, I can fail Prime95 in 10 seconds or less. redface.gif And that's at a measly 4.3Ghz!
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(17 items)
 
 
CPUMotherboardGraphicsRAM
i7 3820 Asus Rampage IV Gene Zotac GTX 980 x 2 16 GB Corsair Dominator Platinum CL9 
Hard DriveHard DriveHard DriveCooling
256GB ADATA S900 x 2 RAID0 3TB x 2 RAID1 1TB x 2 single storage Custom water loop 
CoolingCoolingOSMonitor
XSPC EX360 rads x 1 / AlphaCool Monsta 360 x 2 ... Dual D5 variable pumps Windows 7 64 bit SP1 Samsung 27" LED 
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Logitech G110 Corsair AX750 Case Labs Magnum M8 Logitech G500 
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FireBox
(17 items)
 
 
CPUMotherboardGraphicsRAM
i7 3820 Asus Rampage IV Gene Zotac GTX 980 x 2 16 GB Corsair Dominator Platinum CL9 
Hard DriveHard DriveHard DriveCooling
256GB ADATA S900 x 2 RAID0 3TB x 2 RAID1 1TB x 2 single storage Custom water loop 
CoolingCoolingOSMonitor
XSPC EX360 rads x 1 / AlphaCool Monsta 360 x 2 ... Dual D5 variable pumps Windows 7 64 bit SP1 Samsung 27" LED 
KeyboardPowerCaseMouse
Logitech G110 Corsair AX750 Case Labs Magnum M8 Logitech G500 
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Reply
post #2964 of 6491
Quote:
Originally Posted by X79Extreme7UK View Post

You can try it first by using BIOS pre-set overclocking options. I think Asrock Extreme9 has 4.6, 4.8, 5.0 options in bios. You can try those. In general, try NOT to go over 1.5Vcore. (In BIOS for 5.0 Ghz Vcore might be set to 1.520, but I wouldn't suggest using that for long periods) Also, watch for VTT and VCCSA and try not to go over 1.2v for those and for PLL around 1.8v should be ok. I would also try not to go over 70C temps under stress. Depending on your Vcore and ambient temps H100 should be ok, however; if you want 5.0Ghz+, I would strongly recommend Custom Water Cooling.

When you try pre-set values, Vcore will be set a lot higher than average. So, you can gradually reduce your Vcore till it stays stable under stress. In other words, pre-set Vcore is not a must and it can be lowered which will help you with temps and prolong your chip's life.

Asrock Extreme9 is a very powerful board and if your chip has good features, you can push it to its limits with that board. Try these first and see how it goes....

Thanks for your help, got to 5.0Ghz thought My idles are at 40 atm :S little bit high I think
What makes the most difference in temperature in the OC menu ? so I know what to lower
don't think shes ready yet for a stress test as the idle seems to high compared to the 27 it was on at 4.4Ghz
post #2965 of 6491
If you aren't using offset voltage, use that. It should lower your idle temps back to stock.

Also, make sure to set "minimum processor state" in Windows power options to something a lot lower than 100%.
post #2966 of 6491
Hi everyone! Great thread and big thanks to criminal for starting this (Y).

Been reading this thread a lot to correctly OC my 3820. Currently it's set to 4.625 GHz (125x37) and Vcore is

offset(+) @ auto. With these settings I pass easily Intel Burn Test (Standard) but with very poor GFlops (~60).
PS! WIth IBT temps are maxed out at 70 C

I know that I should hit much higher with 4.625 GHz but I don't know what holds me back. I also tried to set VCore to

manual and alter it to anything below default (~1.380) but it wouldn't pass IBT anymore (system BSODs) frown.gif

Can anyone help me to figure out which settings could be wrong?

Here are my system specs:

Intel i7 3820 + Xigmatex Dark Knight (120 mm Night Hawk edition)
Asus P9X79
Corsair Vengeance CL10 16 gb 1600Mhz
MSi GTX 660Ti


BIOS settings:

AI overclock tuner: MANUAL
BCLK: 125
Strap: 125
Multiplier: 37

CPU VCORE: ~1.372 OFFSET, SIGN: +, @ AUTO
VCCSA VOLTAGE: ~1.100 MANUAL, SIGN: +, @ AUTO
CPU LLC: MEDIUM
CPU CURRENT CAPACITY: 120%

VCCSA LLC: REGULAR
VCCSA CURRENT CAPACITY: 120%

CPU Power Duty Control: T.Probe
CPU Power Phase Control: OPTIMIZED

DRAM CURRENT CAPACITY: 120%
DRAM Power Phase Control: OPTIMIZED

Intel Adaptive Thermal Monitor: DISABLED

All C's are enabled



Everything else is on default (AUTO).


Two questions: Why can't I score higher than 60 GFlops in IBT and why can't I alter VCore below default

(appr. 1.380). I know that some users here are running similar OC's with much lower VCores.

What am I doing wrong guys :/

I'm really digging this OC stuff and OCN (Y) since I got new rig and I've already found great threads and useful information!


Any help is welcome!!
post #2967 of 6491
Thread Starter 
Try manual voltages 1.35 - 1.38vcore , 1.2 on vtt and vscca , 2nd vtt on auto . It all depends on silicon lottery and what you are after as a 24 / 7 o/clock thumb.gif
post #2968 of 6491
Thank you HOMECINEMA-PC!!

I'm going to try these ones out.

I'm looking to get 4.625 under load and with SpeedStep enabled it should drop itself down when idling to preserve power?
post #2969 of 6491
Applied those settings and BSOD in 5 seconds :/

What else I could try?
Does rest of the settings look normal? What about LLC's?
post #2970 of 6491
Quote:
Thanks for your help, got to 5.0Ghz thought My idles are at 40 atm :S little bit high I think
What makes the most difference in temperature in the OC menu ? so I know what to lower
don't think shes ready yet for a stress test as the idle seems to high compared to the 27 it was on at 4.4Ghz

CPU Voltage is in direct relation with the temps. Drop your Vcore and temps will drop a bit. How much you can drop your CPU voltage depends on the quality of the chip. 40C idle at 5.0 Ghz is not that bad but if you can drop Vcore more, temps will drop more.
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