The Official Sandy Bridge-E Overclocking thread

[KieX]

Thanks Live OR Die

Doing little by little, managed to run 1.65 1.365 stable, so will keep dropping in .05's till i find the lowest. Good to have a target range though, so thanks you've cut me some time

[Live OR Die]

Originally Posted by KieX

Thanks Live OR Die

Doing little by little, managed to run 1.65 stable, so will keep dropping in .05's till i find the lowest. Good to have a target range though, so thanks you've cut me some time

No worry's for my chip i think i needed 1.38v on my vcore but my temps on load got into the low 80s because of my room temps in summer.

[EarthDog]

1.65v? Was that a typo?

[KieX]

Originally Posted by EarthDog

1.65v? Was that a typo?

Lol yep, forgot the 3, should be 1.365v.

Got it down to 1.345 with medium LLC last night. Pretty sweet at the moment, it crunches around 65C so it's the same temp as the 2600K's I have in the same room (albeit a lot louder )

280W system draw from the wall according to the killawatt, which isn't too bad. Will probably be quite different when I add a 560Ti

[the54thvoid]

Tried 44 multi with some power tweaks (llc, cpu phase and over current through BIOS. Set vcore at 1.35.

Ran IBT 10x with Very High stress level. Quite happy. Still finding my way around an Asus BIOS after having a biostar one before.

[t_ski]

Here's some randome stuff I gleened from the XS thread for Asus X79 boards:

don't want to bash the party here, but looking at intel's datasheet i found the following figures for max voltage specs and
absolute max ratings (red):
VCC 1.35V 1.4V
VCCPLL 1.881V 2.0V
VCCD 1.575V (DDR3) 1.85V
VTT 1.095V 1.4V
VSA 1.2V 1.4V
remember this is intel spec. we are at xtremesystems here, so most won't even care ...
Batch is #3133B533
Passed 1hr, will try going up later.
http://i43.tinypic.com/dqocj6.jpg
Keep VCore higher than VCCSA for stability
Try to NOT have VCCSA less than VCore by MORE than 300mv for stability
45 and above appear to be problematic. 42-43 seem fine...though the issue is very random and I'm not sure I cycled enough times at lower frequencies to fully conclude. The longer between cold boots the more prevalent the issue, so it takes a long time to cycle. Most common occurence is when the system remains off overnight or all day.

However, good news, I applied some of the adjustments noted above a few hours ago, and I think the cold boot issue may be resolved for my configuration.

I applied the following settings for a CPU OC at 4.8Ghz with the ram at 2133mhz on UEFI 0803:
AI OC Tuner: Manual (changed from XMP or Auto)
Turbo Ratio: All Cores
All Cores: 48
Clock Gen Filter: 20UF (changed from Auto)
Memory Fequency: Manually set to 2133
Vcore: Manually to 1.42v (changed from offset mode or Auto)
VTT: Manually set to 1.25v (changed from Auto)
VCCSA: Manually set to 1.285v (changed from Auto)
RAM: Manaully set to 1.675v (changed from XMP of 1.65v)
PLL: Manually set to 1.95v (changed from Auto)
All other voltages and settings on Auto
Set DRAM timings manually to 11-11-11-31-2T (same as XMP but entered manually...all other settings on Auto).

I had previously set both vccsa and vtt to 1.3v (with all other settings on XMP and Auto except Vcore) which cut down on the occurence but did not eliminate the issue. The manual settings above appear more stable at boot and it's preferred with lower vtt and vccsa needed.

I have cycled about 12 cold boots now with 5-30 minutes in between and so far so good.
The 20uf setting made the most difference for me

[radrok]

Wow, is the IMC so strong to have a maximum specs voltage of 1.85v? That's a lot.

[t_ski]

You can take it with a grain of salt, as I have not verified those specs against Intel datasheets.

[cadaveca]

LARGE grain of salt. For memory clocking for benchmarks, and under sub-zero only, no long-term, or no under high load, IMHO.

Only certain IC's(hypers, PSC @ high-speed) really need that much. Most users with 4GB DIMMs will see ZERO benefit from going that high.

I'm working on memory clocking right now, have been for a few days.

[Live OR Die]

Originally Posted by KieX

Lol yep, forgot the 3, should be 1.365v.

Got it down to 1.345 with medium LLC last night. Pretty sweet at the moment, it crunches around 65C so it's the same temp as the 2600K's I have in the same room (albeit a lot louder )

280W system draw from the wall according to the killawatt, which isn't too bad. Will probably be quite different when I add a 560Ti

What type of cooling are your running i hate this H100 any think over 4.25 on 1.3vcore and my temps on load go over 80C which i wont to keep under .

[KieX]

Originally Posted by Live OR Die

What type of cooling are your running i hate this H100 any think over 4.25 on 1.3vcore and my temps on load go over 80C which i wont to keep under .

H100 with stock fans and the middle setting for speed. But you can scratch my 1.345v.. didn't last the night Back to 1.36v with High LLC for 4.5

Temps are something that's confusing me a little. Intel Burn Test and Prime95 SmallFFT both load around 70C max. Yet when I'm running WCG it's about 73-74C

But yeah, H100 is quite limited with headroom. Asus' JJ may have said the H100 is good for 4.8.. but err.. doesn't look like it to me

EDIT: Maybe i need to start downclocking for a less severe 24/7 clock/temp but kinda sucks.

[Live OR Die]

Originally Posted by KieX

H100 with stock fans and the middle setting for speed. But you can scratch my 1.345v.. didn't last the night Back to 1.36v with High LLC for 4.5

Temps are something that's confusing me a little. Intel Burn Test and Prime95 SmallFFT both load around 70C max. Yet when I'm running WCG it's about 73-74C

But yeah, H100 is quite limited with headroom. Asus' JJ may have said the H100 is good for 4.8.. but err.. doesn't look like it to me

EDIT: Maybe i need to start downclocking for a less severe 24/7 clock/temp but kinda sucks.

Yer i cant see how this H100 can hit 4.8Ghz he must of been sitting below a aircon, But like he said for normal use you will never put the load on your cpu like Prime95 would maybe if your encoding but not for gaming its 35c in my room at the moment and my idle temps are

[radrok]

Custom loop with 3x120/4x120 should cut it for 5 ghz @ accettable temps, a single 480 hardware labs can tame a 980x at 4,7 ghz 1,5vcore. Now that I'm running an H100 because it is less of an hassle, it can't break 4,5.
Was keeping my wc loop for the newcomer but they seem they don't wanna get in stock here -.- might aswell wait for Ivy-E since there is not so much difference with the 980x.
Also remember tha the stress you put up with Prime or linX is way too high and you'll never reach those temps with other tasks.
My 980x has 15-20 degrees of difference between linX and 12 threads with Firefly or Vue or Vray (Vray is the most intensive though).
You shouldn't have many problems Live or Die, with gaming it is hard to find a game that uses more than 4 threads.

[johnnyfiive]

I'll be chiming in this thread soon, still waiting for the goodies to arrive. I'm a bit out of the loop, been really busy lately!
Any tips for 3930k C2 steppings? Whats the max 'safe' voltage so far, 1.4-1.42v? How about max 'safe' temps, 75-80c?

[cadaveca]

Originally Posted by johnnyfiive

I'll be chiming in this thread soon, still waiting for the goodies to arrive. I'm a bit out of the loop, been really busy lately!
Any tips for 3930k C2 steppings? Whats the max 'safe' voltage so far, 1.4-1.42v? How about max 'safe' temps, 75-80c?

1.4 V seems the safe limit for CPU volts. Unless using high-end water, you'll find out why quickly.


1.25 V
1.2 V for VTT, contrary to previous info on C1 chips.


80c-85c is OK for moderate clocking, but I recommend trying to keep well under 80c, @ 75c or so under LinX/IBT.

[t_ski]

Originally Posted by cadaveca

1.4 V seems the safe limit for CPU volts. Unless using high-end water, you'll find out why quickly.

Same reason why Intel decided not to include stock coolers with these...

[cadaveca]

Originally Posted by t_ski

Same reason why Intel decided not to include stock coolers with these...

EXACTLY.


I had to get an H100, and as Keir mentioned earlier in the thread, even that cannot handle much, although my chip has degraded a fair bit.

[johnnyfiive]

I'll be using a NH-D14 with some replacement 100+cfm fans soon. We'll see how it goes! Thanks for the info cadaveca.

[johnnyfiive]

Tonight I will finally have time to get started on my 3930k. I, can't, wait!

[cadaveca]

Originally Posted by johnnyfiive

Tonight I will finally have time to get started on my 3930k. I, can't, wait!

WTH, where's the screenshots?

[johnnyfiive]

I'm just now getting around to the overclocking, pics to come soon!

[johnnyfiive]

Man, 3930K's get hot once you start ramping up the clock speed.
I'll keep going until I hit 80c. NH-D14 SE2011 is no match for the hexcores at 4.6+ :P



IBT, with Win 7 SP1. Toasty toasty.
Ambient temp was 24.1C

[MetalRacer]

She's a hotty on air for sure, but you got it looking good.

[cadaveca]

Originally Posted by johnnyfiive

Man, 3930K's get hot once you start ramping up the clock speed.
I'll keep going until I hit 80c. NH-D14 SE2011 is no match for the hexcores at 4.6+ :P

http://img.techpowerup.org/120324/4.7-ibt-cinebench.jpg

IBT, with Win 7 SP1. Toasty toasty.
Ambient temp was 24.1C

Yeah, that what I was refering to earlier, but it becomes so quickly obvious I figured you'd easily see for yourself.

Those are decent clocks, at decent voltage; Try to not overheat it too much, and limit your IBT runs. Just over 225W seems about the max these CPUs like on high-end air/AIW-Water, and going by HWMonitor, you're pretty close to that.

You might wanna give the 125 MHz BLCK divider a try, see if ya can't get 4750 with 2000/2333 MHz ram, seems to be a nice sweetspot in performance many are hitting under 1.4 V.

[johnnyfiive]

lies.