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Haswell Overclocking Guide [With Statistics] - Page 971

post #9701 of 19652
Quote:
Originally Posted by mav451 View Post

I'm actually a bit curious on how Wizzie put together the table. Mine is a Costa Rica, so if the very first number/letter indicates country of origin, my 3313A646 chip should really be a "313" and not a "331," correct?

So when you say 310 or 312, the *very first* number/letter was a L - indicating Malaysia.
Anyway, just realized that, but maybe there is something to be said of the earlier batches (Week 10, 12, or 13).

The table was put together from entries in the pages of this thread....
post #9702 of 19652
Having a weird problem.. my computer is now rebooting in BF4, it's giving no BSOD code either. Few pages back I went through that Prime exercise and the funny thing is that I'm now only 0.02v away from the Prime "so called stable", yet playing BF4 is rebooting my computer.

Think I've punished my chip too much, don't know. Went back to stock, looked at what it wanted there and now I've set it to x39 @ 1.12v and cache x39 @ 1.17v, no issues since. Have to figure out if it's my chip or GPUs as they're going on sale as soon as I get mine TI Classy!!
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post #9703 of 19652
Quote:
Originally Posted by blaze2210 View Post

The table was put together from entries in the pages of this thread....

Yeah I'm saying mine should a been input as 313 tongue.gif
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post #9704 of 19652
Quote:
Originally Posted by blaze2210 View Post

Apparently, I overshot the VID a bit the last time....So I increased the VRIN a bit, went from 1.945 to 1.956 and started gradually decreasing the VID - went from 1.430v to 1.38....Now, I'm running 4.7ghz with 1.41v....thumbsupsmiley.png

I tried messing with the BLCK before and just got a bunch of instability....Now that I know a bunch more about Haswell and my board, it might be worth giving it another shot....biggrin.gif

Nice one! Yeah, go muck around with bclk for sure, although you might need to bump that vid up by one notch again tongue.gif

Quote:
Originally Posted by OutlawII View Post

Good point! But your using a H100 not that great either to be honest

Haha true. I'm delidded with CLP on die and MX4 on IHS. Full loop should be done by the end of March smile.gif
Quote:
Originally Posted by JJFIVEOH View Post

Thank you. I just put this system together for somebody and initially saw that VCore seemed to be much less than a Sandy Bridge for similar OC's. I saw many people 'claim' mid 4's with under 1.3 (now I see that's what you guys are discussing). I just tried 4.2 @ 1.35 and seems to be good so far. Didn't think I would need to boost it that high. Haswell is new to me, I'm more familiar with Sandy Bridge. My SB setup is 4.6 @ 1.4 volts but it's also with an LLC that allow it to drop considerably when at idle. Thanks again.

For a starting baseline, I'd plug 4.4 core, 3.8 cache, 1.33 VID (1.35Vcore) and 1.92 VRIN. You'll probably find stability there, and from that you can work the multipliers up or the voltages down (but don't do both at the same time).

Quote:
Originally Posted by fritzdis View Post

VID being lower than vCore is one reason why I noted how many entries were at or below 1.25v.

Certainly, you can question the stability of some of the entries. Let's throw out all of the 4.5 / <1.3v entries that depend on XTU or an unspecified version of Prime95, as well as the "some BF3" entry. We'll also ignore Hunter and Tobi's entries (I'm guessing Hunter would still be very stable under 1.25v, but Tobi might not be). We'll even throw out the reported batch 310 or 312 chips. After all that, we're still left with 12 of 25 entries having a VID of 1.275 or below.

The point is not that the "average" chip should be able to do 4.5 at less than 1.3v. As I said in the edit of my previous post (which got bottom-paged), we're not going to be able to draw that kind of conclusion from our limited data. I just wanted to point out that "almost no one using less than 1.30v for 4.5 and above" is probably not an accurate description of the data provided by the table on page 1.
What entries are left after that? I'd do it myself, but being on mobile makes it hard.

Are there really only 25 entries left with >1.30Vcore?

Quote:
Originally Posted by mav451 View Post

I'm actually a bit curious on how Wizzie put together the table. Mine is a Costa Rica, so if the very first number/letter indicates country of origin, my 3313A646 chip should really be a "313" and not a "331," correct?

So when you say 310 or 312, the *very first* number/letter was a L - indicating Malaysia.
Anyway, just realized that, but maybe there is something to be said of the earlier batches (Week 10, 12, or 13).

Batch 310 and 312 refers to L310 and L312, which as you correctly pointed out indicates a batch originating from Malaysia thumb.gif
post #9705 of 19652
I've got what may be a stupid question. I'm setting this computer up for somebody else so I won't be spending significant time on it. Currently I am at 4.3 @ 1.335 and it's stable. This is a 4670K with an MSI Z87-GD65. On my 2600K/Asrock OC Formula I have it set up so the voltage drops to around .96-1.00 when not under load, and 1.40 volts under load. This is a 4.6 setup. I don't see any settings in BIOS for this board/CPU combo that might allow for me to do with same thing, having the VCore drop when not under a load. Am I missing something?

On a side note, I am quite surprised at the PCMark7 scores I am getting from this computer at 4.3 with an SSD over the PC I have in my sig. Almost 20% higher.
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post #9706 of 19652
Quote:
Originally Posted by fleetfeather View Post


For a starting baseline, I'd plug 4.4 core, 3.8 cache, 1.33 VID (1.35Vcore) and 1.92 VRIN. You'll probably find stability there, and from that you can work the multipliers up or the voltages down (but don't do both at the same time).

Thank you much. Those other numbers will come in handy. That's what I'm shooting for 4.4-4.5 so the rest of those numbers will help tremendously. Forgive me, I'm new to Haswell and it's not quite the same as Sandy Bridge. wink.gif
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post #9707 of 19652
Quote:
Originally Posted by JJFIVEOH View Post

Thank you much. Those other numbers will come in handy. That's what I'm shooting for 4.4-4.5 so the rest of those numbers will help tremendously. Forgive me, I'm new to Haswell and it's not quite the same as Sandy Bridge. wink.gif

No problem. To answer your question about Vcore dropping when idle, you must do the following:

Ensure your C States and EIST are enabled in the bios (You'll find these settings somewhere in the power saving area of you bios)

And also ensure your CPU's "minimum power state" is set to 5%. You'll have to go to Power Options in Windows and configure your High Performance profile. There will be an option in there to specify minimum power state (or something similar) as a percentage value.

Depending on the mobo you use, you may also have to enable Adaptive voltage for your Vcore. See if the above 2 steps work first though, because enabling Adaptive voltage can be risky when stress testing your overclock for stability
post #9708 of 19652
Quote:
Originally Posted by fleetfeather View Post

No problem. To answer your question about Vcore dropping when idle, you must do the following:

Ensure your C States and EIST are enabled in the bios (You'll find these settings somewhere in the power saving area of you bios)

And also ensure your CPU's "minimum power state" is set to 5%. You'll have to go to Power Options in Windows and configure your High Performance profile. There will be an option in there to specify minimum power state (or something similar) as a percentage value.

Depending on the mobo you use, you may also have to enable Adaptive voltage for your Vcore. See if the above 2 steps work first though, because enabling Adaptive voltage can be risky when stress testing your overclock for stability

Great, thanks! I'll mess with this on Sunday. In the next couple of days I'll post my results for future reference for everybody else to use.
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post #9709 of 19652
Quote:
Originally Posted by fleetfeather View Post

What entries are left after that? I'd do it myself, but being on mobile makes it hard.

Are there really only 25 entries left with >1.30Vcore?

Those numbers were only for entries at exactly 4.5. There were 36 to start with - 23 below 1.3v and 13 at or above 1.3v. I only threw out entries below 1.3v, bringing the totals to 12 entries at or below 1.275v and 13 entries at or above 1.3v. Here are the entries that remained:

Warning: Spoiler! (Click to show)
  • 97udash3
    VID: 1.194, x264 x7
  • ALxx
    VID: 1.205, x264 x4
  • Menphisto
    VID: 1.23, Prime 28.1 18hr
  • amd955be5670
    VID: 1.235, IBT High x6
  • oranid
    VID: 1.245, 1hr Aida FPU, 1hr OCCT Large, IBT Standard x10, Hyper Pi 32m
  • [Cygnus]
    VID: 1.25, x264 7pass
  • 209Ham
    VID: 1.25, Linkpack Stable
  • Lomardosoup
    VID: 1.25, x264, Prime95, IBT
  • elrana
    VID: 1.253125, x264 20Pass
  • Shanenanigans
    VID: 1.263, x264 x5
  • kinzx
    VID: 1.267, IBT 8hr
  • brutus90
    VID: 1.275, x264 x20
  • CTM Audi
    VID: 1.3, x264 20Pass
  • Crabby654
    VID: 1.3, x264 20Pass
  • fleetfeather
    VID: 1.3, x264 x30 XTU 6hr
  • eddward
    VID: 1.305, Aida64 2hr
  • vehuggarn
    VID: 1.31, 6HR xtu
  • StencilSD
    VID: 1.31, 9hr XTU
  • freinando
    VID: 1.32, Aida64
  • crashdummy35
    VID: 1.3125,
  • Rickyman0319
    VID: 1.33, XTU 4hr
  • peakclimber
    VID: 1.33, x264 x10, Aida64 1hr, Aida64 FPU only 30min
  • ejic
    VID: 1.34, Linpack
  • tomlev5
    VID: 1.34, XTU 8 hr
  • jrcbandit
    VID: 1.36, Realbench 2hr
post #9710 of 19652
If it means anything, here are some comparisons. I was surprised to see what I thought was a lesser system have a higher score in PCMark7. Yes, it's only one benchmark, but still.

System 1

-2600K @ 4.6
-Crucial M4 256 GB
-2X4 GB Mushkin 2133 RAM
-Windows 7 Ultmate
-slightly OC'ed 470 GTX
-Asrock Formula OC

System 2

-4670K @ 4.3
-Samsung EVO 840 120 GB
-2X4 GB Mushkin 1333 RAM
-Windows 8.1
-EVGA 660 GTX Superclocked
-MSI Z87-GD65

http://www.3dmark.com/compare/pcm7/785347/pcm7/785429
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