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Haswell Overclocking Guide [With Statistics] - Page 950

post #9491 of 19539
Hey. Courier just delivered my CPU+MOBO.

3dD10ks.jpg

Any indication if it might be good or bad? I will install it later today.
post #9492 of 19539
Quote:
Originally Posted by crun View Post

Hey. Courier just delivered my CPU+MOBO.

3dD10ks.jpg

Any indication if it might be good or bad? I will install it later today

Doh! I just looked at the batch then realized it was a 4670 not 4770.
Edited by Inons - 1/31/14 at 8:27am
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post #9493 of 19539
Quote:
Originally Posted by crun View Post

Hey. Courier just delivered my CPU+MOBO. Warning: Spoiler! (Click to show)
3dD10ks.jpg
Any indication if it might be good or bad? I will install it later today.

From everything I've seen online about Haswell, there is little (to no) correlation between the performance of the CPU and the batch number. You'll have to just install it and see for yourself....
post #9494 of 19539
Quick question -

I haven't OC'd a system in a really long time. I'm getting my 4670 + Maximus VI Hero + 1866 G.Skill kit today. When first OC'ing my CPU, I should not use the 1866 XMP in the BIOS, and instead manually set to 1600? Or don't bother at all and leave at 1333 default and enable XMP once I'm happy with my CPU OC?
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post #9495 of 19539
Just clock RAM or enable XMP (whatever) after CPU is overclocked and stable
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post #9496 of 19539
Quote:
Originally Posted by peakclimber View Post

Thanks JackNaylorPE. Your OC settings are the same as mine (45/45 2400mem) and I was wondering about the affect of uncore ratio. I can believe different applications as well as different memory speeds may have an affect on the performance because, after all, all cross core L3 cache / memory requests and responses need to have an open slot on the ring to handle the transactions to and from the particular core. If the ring is running "too slow" then it can get "backed up" like a highway during rush hour (a loose analogy here). The question is where the knee on the curve really is. I think you might be hinting at one ... at least the image editing test. That particular result is consistent with some other passing remarks on the web around uncore to core ratio differences. Which probably means, that test is doing well in terms of keeping the ring busy.

Well I guess it's not surprising that RoG Real Bench would produce an answer in line with Asus' cache setting comment in their overclocking videos that it can affect performance after -3. There's just too many variables to consider to make an absolute recommendation. But using the OC profile feature, you can conveniently set up various profiles. I have a 45/45 and a 45/42 and they both are similarly stable with no difference in voltages or temps, so why not use 45/45 ? With the new BIOS ..... 46/46, 46/43 and 46/39 all push the voltage up to 1.48 when ACX instructions are used w/ adaptive control so until that is fixed, I'm not playing there.

And my last attempt at 45/45 XTU failed..... ran it, was fine.... updated next day and ran again and it failed....in like 2 seconds.....and yet RoG Real Bench ran fine.....downloading new version now......may have some time to test again this weekend.
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post #9497 of 19539
Quote:
Originally Posted by Cyro999 View Post

Hey, i wanted to ask since you seem to know more:


I took my ~3-4 months rock solid stable OC of ~4.5ghz, 1.24vcore, 1.85 vrin (extreme llc)

I did not see a single whea, crash or indication of instability in x264, games or any other stress, since 1.23vcore, and was using 1.24.

I turned uncore from 40x down to 33x, keeping 1.2 ring

I set my RAM at its 2200 timings down to 1333mhz

i added 0.05vcore and 0.1vrin

It still can't hold up at all against 28.3 fft 1344, what's up? What should i change? Got 101's before i turned RAM down, now it's just dropping threads like crazy - like three or four down in 30 seconds.

All values are bios values

Tried more VRIN: Not seen this one before LOL

RLc1rrm.png

This site that i had bookmarked for Haswell says this:
however there are two different variables there: It says to use in-place (i did not) and also Prime 27.9 (which is old by now) though i will experiment with them.


Ok, 27.9, in-place 1344k seems to work fine @1.26/1.9 ht off. Doing more/longer tests now. It's not hot (larger fft sizes in general), i'm peaking 70c


Prime 27.9, in-place, 1344k, 15 minute pass with 1.26/1.9.

Bluescreen in ~8.5 minute with 1.24/1.9 - a 9c (with peak temps around 70)

This has a lot of potential IMO. It took me a week to narrow down to that value using x264 and games.


WzkJTwi.png

If this is good for narrowing down vcore or other voltage ranges fast - i don't see the problem with it IMO!

Failure at 46x in 10 minutes. No BSOD registered (i think it was restart; i actually forgot if there was a code, but bluescreenview says nothing, i'm just taking the time from event viewer)

^At 1.28vcore, 1.9vrin. I'm quite impressed with this actually, in that it's harsh but realistic.

Yeah man, I am no expert, I just know prime has the capability to force the cpu to showing early sign of instability or how close to rock solid it might be.
When I was around 20 passes of x264 and did prime in under 1minute I got pissed off seeing as I was going to spend countless overnights waiting for a blue screen.


The 1344 and 1792 FFT are quick ways to check stability (from sandy and ivy OC) and I figured why not on haswell, problem Is I still don't understand haswell's no droop and rise + all these voltages for vcore/input/cache and how they play out when testing the OC.
IE:
At what point do I stop adding vcore and add vrin, I know there is some general rule to add ~.4 ~.5 of vcore to vrin?
Darkwizzie had a good point of adding X.X to either and seeing which gives you more time before the bluescreen to maybe isolate them.
My problem was x264 took way too long for testing. My other issue was I can run aida64 for 9hours and I still might bsod at 20m~30m minutes in prime. Aida seems to fluctuate throughout testing where prime is like a bad guy beating on your chip to see whether it will handle the pressure or if it will give up at any point and time

I pushed prime in hopes of having more people accept it more and us utilize it for a quicker elimination of vcore/vrin... I can't do it myself though, too many people are giving it a bad rep for not using it in a manner that makes it more efficient than some tests. It really won't burn your cpu up at 1344 or 1792 fft threads with 90%ram, if you load the full 8-496k threads with 90%ram it's definitely going to break that unrealistic barrier of heat.

I really don't know the exact real world application/scenarios where the same FFT and workload will be presented by prime. Prime really does stretch the 100% load and threading to an extreme, which is why it's an extreme test with ridiculous heat that no one likes
  
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post #9498 of 19539
My RAM has CAS 9 at 1866 (which is meant for) but when I drop it to 1600 the CAS goes up to 11. If Ibring it down to 9 at 1600 would it crash? I thought that at lower frequency you cal lower the timmings, so not sure why it's going up to 11.
post #9499 of 19539
Quote:
Originally Posted by Leopard2lx View Post

My RAM has CAS 9 at 1866 (which is meant for) but when I drop it to 1600 the CAS goes up to 11. If Ibring it down to 9 at 1600 would it crash? I thought that at lower frequency you cal lower the timmings, so not sure why it's going up to 11.

Are you leaving the timings on Auto, or are you manually setting them? It could be that the JEDEC standard timings for 1600 are higher than the XMP profile for your RAM....
post #9500 of 19539
Quote:
Originally Posted by Leopard2lx View Post

My RAM has CAS 9 at 1866 (which is meant for) but when I drop it to 1600 the CAS goes up to 11. If Ibring it down to 9 at 1600 would it crash? I thought that at lower frequency you cal lower the timmings, so not sure why it's going up to 11.

You are required to manually set RAM primary timings and voltage
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