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i7 3820 - 4820 Overclock Club - Page 321

post #3201 of 6499
Quote:
Originally Posted by yanks8981 View Post

Is it true you cannot use offset voltage if you change the BLCK from 100?
[EDIT] I was assuming you're referring to STRAP when you said "change the BLCK from 100", hence the reply below. However, let say you keep the STRAP to 100/Auto & change BCLK to 102 or 105 for example, offset voltage will still allow Vcore to drop down when idle.

[Original reply]
Actually you can but it will be pointless because Vcore voltage (reported by software) doesn't drop down when idle. So, better use manual voltage instead. When I said "better", I means you don't have to go through the trouble calculating the required offset you need to use. If you set CPU power saving (C1E/C3/C6/C7) to enabled, even if you running fixed voltage, CPU power consumption when idle actually lowered, just like you use STRAP 100 & offset voltage.

This is my experiment with offset voltage & STRAP 125.
Quote:
Originally Posted by kizwan View Post

SavantStrike,

I will check for Turbo offset on next reboot. I experimented with offset VCORE again. Long story short, I set offset VCORE to +0.33. This result VCORE 1.352V.


Warning: Spoiler! (Click to show)
Running Prime95 to see the max VCORE the CPU get (VCORE 1.352V - 1.360V):-


Running IBT "Very High" for 10 passes (VCORE 1.352V - 1.360V):-


This is my experiment to see whether "dynamic" VID is working or not when using STRAP 125.
(STRAP 100 - idle) VID 1.0258


(STRAP 125 - idle) VID 1.0258


(STRAP 125 - load) VID 1.2610

Edited by kizwan - 6/1/13 at 11:34pm
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post #3202 of 6499
Trying to increased my overclock despite it's hot season right now, ambient during daytime can go up to 37C devil.gif. Vcore needed quite high for 4.75GHz on my chip. With CPU LLC to Medium, I need to set quite high Vcore in BIOS to compensate Vdroop. I just set CPU LLC to High, much easier. Interestingly if I use offset voltage, it's much easier to get correct Vcore but I just use manual anyway. VCCSA and VTT are set to 1.2V & this solved BSOD 0x124. My RAM sticks was rated with VCCSA 1.2V.

4.75GHz @Vcore 1.382V - 1.386V, IBT Very High: VRM 66C, ambient 32C.

The "C State" window is for monitoring whether CPU cores did enter C3/C6/C7 between tasks which they did briefly (not shown in the screenshot) & it did not causing instability with my chip.


Edited by kizwan - 6/3/13 at 10:37am
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post #3203 of 6499
I'm curious if anybody else has a rock stable 5ghz @ 1.416v idle -- 1.424v maxload

It is set to 1.4v in bios with high llc
3+ months of IBT, Prime95, Cinebench and 3dmark11, plus constant gaming, and not a single bluescreen or error.
All C-states enabled. At idle cpu uses 28.8W and 161W maxload.
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post #3204 of 6499
Quote:
Originally Posted by Wookieelover View Post

I'm curious if anybody else has a rock stable 5ghz @ 1.416v idle -- 1.424v maxload

It is set to 1.4v in bios with high llc
3+ months of IBT, Prime95, Cinebench and 3dmark11, plus constant gaming, and not a single bluescreen or error.
All C-states enabled. At idle cpu uses 28.8W and 161W maxload.
Mine probably need 1.5++V for 5GHz. BTW, when I set Vcore voltage to 1.355V with high LLC, Vcore is actually 1.376V according to CPU-Z. Did I mess with my settings or anything?? confused.gif
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post #3205 of 6499
Thread Starter 
Quote:
Originally Posted by Wookieelover View Post

I'm curious if anybody else has a rock stable 5ghz @ 1.416v idle -- 1.424v maxload

It is set to 1.4v in bios with high llc
3+ months of IBT, Prime95, Cinebench and 3dmark11, plus constant gaming, and not a single bluescreen or error.
All C-states enabled. At idle cpu uses 28.8W and 161W maxload.
It just so happens ive come across a L204 batch malay 3820 VERY similar to your chip . Its hopefully " run in " by now just gotta go get it thumb.gif
Edited by HOMECINEMA-PC - 6/4/13 at 1:02am
post #3206 of 6499
Quote:
Originally Posted by HOMECINEMA-PC View Post

It just so happens ive come across a L204 batch malay 3820 VERY similar to your chip . Its hopefully " run in " by now just gotta go get it thumb.gif

I think that was the same batch as my last Malay... but it died a sudden death without ever getting "run in"
This chip is a Costa.

And to think I was gonna buy a FX-8350... herpa derp.

BTW is there any reason Cinbench 11 reads my 5ghz overclock as 4.51ghz ?

AND a quick watercooling question...
My water temp @ idle is 25c.
My Core temp @ idle is 30c
My water temp @ load is 28c
My Core temp @ load is 60c

My cpu is seated properly and I have great TIM spread.
Should my CPU under load be cooler ?
or are those temps expected for my WC setup.

140.5 of 60mm rad
10x140mm fan push pull
380i
355x pump/res

For some reason I feel like my temps should be lower under full load.
Edited by Wookieelover - 6/4/13 at 4:15am
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post #3207 of 6499
Quote:
Originally Posted by kizwan View Post

Mine probably need 1.5++V for 5GHz. BTW, when I set Vcore voltage to 1.355V with high LLC, Vcore is actually 1.376V according to CPU-Z. Did I mess with my settings or anything?? confused.gif

Nope that seems about right. My voltage is set at 1.400v with high LLC and under load it gets up to 1.424v. So i'm guessing that High LLC adds about 20-25v ontop of your settings under load conditions.
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post #3208 of 6499
Thread Starter 
Quote:
Originally Posted by Wookieelover View Post

I think that was the same batch as my last Malay... but it died a sudden death without ever getting "run in"
This chip is a Costa.

And to think I was gonna buy a FX-8350... herpa derp.

BTW is there any reason Cinbench 11 reads my 5ghz overclock as 4.51ghz ?

AND a quick watercooling question...
My water temp @ idle is 25c.
My Core temp @ idle is 30c
My water temp @ load is 28c
My Core temp @ load is 60c

My cpu is seated properly and I have great TIM spread.
Should my CPU under load be cooler ?
or are those temps expected for my WC setup.

140.5 of 60mm rad
10x140mm fan push pull
380i
355x pump/res

For some reason I feel like my temps should be lower under full load.
Are you kidding or what ? 5Gigahurtles with load topping at 60c eek.gif That's friggin awesome thumb.gif

That's right you borked that 3820.....anyways this one im getting did on a rough o/clock for a val 5Ghz@1.41vcore so im interested to see what I can get outta it . Now that I can force aircon thru the case I can get 15c less temp so this one im gonna treat real nice with 5ghz low voltages all round and 2400 ram speed . And I just might have a crack at 5.4 when and if wanna get nasty aaevil.gif
post #3209 of 6499
Quote:
Originally Posted by HOMECINEMA-PC View Post

Are you kidding or what ? 5Gigahurtles with load topping at 60c eek.gif That's friggin awesome thumb.gif

That's right you borked that 3820.....anyways this one im getting did on a rough o/clock for a val 5Ghz@1.41vcore so im interested to see what I can get outta it . Now that I can force aircon thru the case I can get 15c less temp so this one im gonna treat real nice with 5ghz low voltages all round and 2400 ram speed . And I just might have a crack at 5.4 when and if wanna get nasty aaevil.gif

No i was being serious... Lol
Have no basis for comparison so was not sure if the load temps are good.
I realise the idle delta is in the sweet spot.

Hope you have good luck with that new chip.
Try to resist doing any silly suicide runs with it.. Lol
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post #3210 of 6499
Quote:
Originally Posted by JKDC View Post

This chip "breaks in" after 1-2 weeks and it requires more voltage at the maximum OC. You can either go down a bit and use your lower voltage or you need to raise it. For example, I was able to do 4.625 at my prior voltage of 1.34v after it breaking in but I had to raise the voltage to 1.4v from 1.355v for 4.75. That was until I later discovered I could lower CPU PLL to 1.466v and use 1.36v for 4.75. So if you can lower your CPU PLL with your board you might get it stable at your current settings.

For those trying to OC their chip and suffering from high vCore I suggest you look at this.

Lowering my CPU PLL from 1.8v to 1.65v has allowed me to drop my vCore from 1.38v to 1.36v keeping LLC to high on my RIVF.

I know not all boards allow this.

FYI I can get 4.75 with these settings. idle @ 30-35 and load @ 70c.

I have had 4.875 stable with 1.39v vCore, CPU PLL at 1.8v and LLC high, but that pushes vCore to 1.4-1.408v under load, which i'm a bit worried about. Temps aver 72c. This was before I realised about the CPU PLL trick...so I might try for 4.875 at 1.37v with LLC on High.

I run an Antec 920. and VCCSA and VTT are both set to 1.15.
Edited by lnoton - 6/4/13 at 7:25am
2011
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2011
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