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The Gigabyte Z87/Haswell Overclocking(OC) Guide - Page 142

post #1411 of 3247
Quote:
Originally Posted by wermad View Post

99.77 x 38 = 3791.8

You have Speedstep enable, that slows down the cpu clock when idling or in low use. Run a cpu bench and it should clock up to your max. I like Speedstep since i don't really want to run 4800.01 all the time. Its a power saving feature.

Hmmm, last I heard bclk is not tied into the ram or pcie clocks. Go into your bios and set the bclk manually to 100.03 and then boot up. Its something common w/ the Enthusiast boards. Had it with P67/Z68, Z77, and now Z87.

that 3791MHz is BF3 64 player multiplayer load not idle :/

upto F5 or F6 it was working currectly on z87x-ud3h

Speedstep is designed to reduce the clock ratio at dle/low power not to reduce the base clock.
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post #1412 of 3247
Quote:
Originally Posted by xtreemeNoob View Post

that 3791MHz is BF3 64 player multiplayer load not idle :/

upto F5 or F6 it was working currectly on z87x-ud3h


No, that's why I separated the calculation from the next point (next paragraph). I'm not saying that's speedstep, that's just your bclk times your turbo multi and hence why that clock. The next part (paragraph) points out why your speed drops to ~800mhz, that's speedstep.

Again, all you need to do is set the bclk manually to 100.03. Not sure how this keeps getting ignored. My Sniper5 is on the latest bios and it runs the bclk at 99.77. I just set it manually. Concern fixed.


Good luck thumb.gif
post #1413 of 3247
Quote:
Originally Posted by wermad View Post

No, that's why I separated the calculation from the next point (next paragraph). I'm not saying that's speedstep, that's just your bclk times your turbo multi and hence why that clock. The next part (paragraph) points out why your speed drops to ~800mhz, that's speedstep.

Again, all you need to do is set the bclk manually to 100.03. Not sure how this keeps getting ignored. My Sniper5 is on the latest bios and it runs the bclk at 99.77. I just set it manually. Concern fixed.


Good luck thumb.gif

I know that 100.03 will fix but i just posted here so that sin/stasio report it to Gb HQ, saw in tweaktown that stasio reported the same problem for Z87-D3HP upon request from a forum user and GB fixed it in next bios upgrade.

Lol, btw I was never concerned about speedstep i know the mechanism I just mention about 800Mhz to compare between 99.77 and 100.00.

Cheers thumb.gif
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post #1414 of 3247
Loading os
Do you get into bios ok?
Sounds like a damaged file in the boot to windows or whatever os you have
post #1415 of 3247
Quote:
Originally Posted by Zoroastrian View Post

GoGators you are awesome all fixed !

Glad I could help biggrin.gif
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post #1416 of 3247
You did ! I was about to run a repair on windows until I read your comment !
Hey for some reason my bios is really jerky with the mouse and freezes ...I'm also missing xmp profiles ... Do you know how to fix that ?
post #1417 of 3247
Quote:
Originally Posted by sLpFhaWK View Post

Hi guys, this is going to seem pretty ignorant and for that I truly apologize, it's just I've never OC'd any pc of mine before but i'd like to get a slight OC on the PC i just built recently. I've read the 1st post a few times and I *think* I have the basic idea but i'm not 100% so I wanted to ask to be certain of a few things. I was experimenting in the bios w/ OC stuff earlier and it rebooted and wouldn't post so I had to reset the BIOS and i'm honestly a little scared to try again without being certain.

Here is what I have in terms of Hardware.

Case is the Bitfenix Prodigy
CPU is the new Haswell i5 4670k
Moto is the GA Z87N Wifi
Memory is the Corsair Dominator I believe? I forget but it's ddr3 1600
CPU Cooler is the 212 Evo
Graphics is an MSI nVidia gtx 760
I added 2 more 120mm Fans for a total of 4

Now I really just want a slight OC probably 4-4;2ghz, Are the fans I have no efficient enough for that? according to CPUID my temps just from browsing the web and backing up my steam library are around 32c but the #'s are so sporadic it's really hard to gauge what they really are. Is there a better HW Monitor I could use to get better more reliable readings?

In the BIOS I reset everything to default because like I said I got scared. Now in the 1st post it says if you're a noob to overclocking it says to set the multiplier and the base clock, but when I did that I didn't see a change in any speeds, windows was still seeing the cpu at 3.4ghz now will that even change when you oc? Do I need to mess with voltages? do I need to OC my memory too?

I apologize for being such an idiot with this but my goals I feel are easily obtainable I just need some help to get over the hurdle.

Thank you everyone.

OK, thank you for posting your build info, mate, but we need more specifics here. frown.gif It's hard to help with vague questions.

1) What were you messing with that caused it to reboot initially? And did you mean reboot in the BIOS or in Windows? If it's in Windows, you need to disable automatic restarting so you can read the BSOD code.

2) Fan should be fine. It's more your CPU cooler, but general airflow helps. The 212 EVO is a fine cooler.

3) Temps: I had the same problem. So, I use HWiNFO64 and tell it "Start Logging". It makes an Excel file--then, in one of the dozens of columns, it has the temps of your 4 cores. From those columns, I calculate an average, a 75th percentile, and a 99th percentile.

4) OK, read the 1st post a few more times. If it's confusing, ask us. To answer your questions quickly, sometimes Windows reports the stock speed even when OC'd. Use CPU-Z or T-Monitor or HWiNFO64 to tell the real CPU frequneyc. Yes, you'll probably need to mess with "voltages" unless you have a magic chip that can OC to 4.2-4.4 with stock VID. If you want to, you can OC your memory. Google memory OC to see if the benefits are worth it to you. Again, read the 1st post a few more times.
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post #1418 of 3247
Quote:
Originally Posted by Zoroastrian View Post

You did ! I was about to run a repair on windows until I read your comment !
Hey for some reason my bios is really jerky with the mouse and freezes ...I'm also missing xmp profiles ... Do you know how to fix that ?

The only insight I have on the mouse/BIOS is that mine changed drastically with the one BIOS update that I did. Initially, the mouse response was normal/slow in the BIOS Windows mode. Then after I updated to to a newer version (currently on F5) it became ridiculously fast... almost unusably fast. I normally just use the legacy BIOS option instead of Windows mode because it's easier to me.

Maybe a newer version of the BIOS will add better support? I know the F5 doesn't support my GTX 760 @ 1920x1080 so I'm probably going to update it soon. Same with the XMP profiles. I'd venture to say that a new BIOS may be the best bet. If your board has the dual-BIOS it's a pretty safe thing to try and update.
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post #1419 of 3247
Given that you can keep the cpu's at a decent temp, how high would you go in terms of voltages?

ATM running:

Vcore: 1.41v
VRIN: 2v
CPU Ring Voltage: 1.26v

running chilled water and cpu peaks at 46c during 3d benching.
post #1420 of 3247
Quote:
Originally Posted by ehume View Post

My 4770k booted into Windows once at 5GHz. I got a screenshot of it showing 5000.05 MHz, but CPU-Z came back with 4999.96 MHz. But that wasn't at all stable, just a trophy run that I have not repeated.

I had it stable at 4.7GHz running the original LinX. Then I imported Linpack 10 into LinX. Linpack 10 uses the AVX codes. Oops. Too hot. Throttling. Cut back my OC.

Then I tried running LinX with Linpack 11. It would run one rep, then stop. I then ran Linpack from a bat file. I noticed that Linpack wasn't using all 8 threads all the time. I asked on the AT forum, got some links, and learned that HT can confuse Linpack, reduce the results. So I turned off HT and ran Linpack. The AVX2 really cooked the chip. So now I'm running 4.3GHz.

While my silicon looks to be an OK chip, the interface with its IHS looks to be bad. As best I can tell, up to a certain level of heat production, the TIM can keep up and the core temps are OK. When heat production exceeds the capacity of the TIM to pass it along, core temps start to climb. In my cpu, the core temps skyrocket; they jump up very quickly.

Interesting: the air coming off my NH-D14 was only lukewarm, even when core temps were 98-100c. When the same heatsink is attached to my i7 860, when the cpu is loaded -- especially at 4GHz -- the D14 feels like a hair dryer. The core temps were in the 70's.

At a certain level of heat production, the ihs surrounding my cpu becomes more like a thermos bottle than an ihs. So, unless I delid my cpu I am thermally limited, not stability limited.

And that level of heat production does not need a D14 to dissipate it, so I use an Armageddon instead.

Because an app may use AVX2 without my being aware of it, it could ambush me. So I keep my rig set up for the worst case scenario -- 4.3GHz.

I think this is a great observation. The air blowing through and out of the heatsink is definitely not hot like it was with my old 2600K when overclocked. Even when 4770K is hitting 99C, the air temperature from the heatsink is not that much hotter than when it's running at 60C. I am beginning to think this is why intel got rid of the extra free turbo binning past 3.9GHz we used to get before.

BTW, great guide Sin0822, I used it to help me with my ASUS board actually. thumb.gif
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