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4690k @4.4GHz drops to 4.2 on windows because of bus speed - Page 3

post #21 of 30
Maybe it's something wrong with the board? That's very odd indeed.
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post #22 of 30
Thread Starter 
Ok now I really ****ed up something, or this Gigabyte bios is ****. I wanted to OC proc again to 4.4GHz, I switched most of options to proper value but when I set clock ratio to 44 I used this on-off switch and clicked 'apply' . I thought its for saving values, but now It looks like its for applying this values 'on fly' as monitor reported that frequency jumped to 4400MHz, of course right after PC rebooted as I havent changed voltage and i guess stock was too low.
Now all changes I made before was saved but clock ratio set to 35. I changed voltage, set clock ratio to 44, did a reboot and suprise- voltage changed to 1.2 but cpu is still at 3900MHz, whats more interesting I disabled turbo before so it should be stock 3.5GHz Oo

Ive tried again this on-off switch, but it works only while im in bios and when I choose 'save&reboot' I have again 3.9GHz.
Edited by MagicalCauldron - 6/7/15 at 1:48pm
post #23 of 30
Thread Starter 
I played a bit more with bios settings and looks like new Gigabyte F8 bios desnt care anymore what I set under clock ratio. Now core frequency depends on what is set in turbo mode, even if disabled. biggrin.gif
Of course problem with bus speed didnt change...
I already wrote ticket to Gigabyte support with question about whole this problem.

post #24 of 30
Is it possible to return the mobo as faulty and buy an ASUS or MSI one instead? I prefer using Gigabyte for AMD builds, but I never thought there would be issues as crazy as this.
post #25 of 30
I am pretty sure that this is a problem with CPU-Z and there is nothing at all wrong with your board.

If you want a second opinion, give RealTemp a try. Another user was having this exact same problem a week or so ago. RealTemp did not show anything unusual with his BCLK. His board was fine.

RealTemp 3.70
http://www.techpowerup.com/downloads/2089/real-temp-3-70/

If you want an even more accurate look at your BCLK then check out the updated version of RealTemp.

RealTemp T|I Edition
https://drive.google.com/open?id=0B0dpSo9k93jDZlpmbHNzeFlpcWc&authuser=0

ThrottleStop can also measure the BCLK very accurately. Each time you click on the BCLK button, it will resample your MHz.

ThrottleStop 8.00
https://drive.google.com/open?id=0B0dpSo9k93jDNWtRVEZVUGVpdGM&authuser=0

Accurate timing in Windows can be a little flaky. Many of the monitoring timers are shared so one monitoring program can interfere with another program. Some screenshots would be interesting.

Edit - My laptop reads 99.769 MHz for the BCLK and it doesn't budge.

OewuyWM.png
Edited by unclewebb - 6/7/15 at 4:20pm
post #26 of 30
Quote:
Originally Posted by unclewebb View Post

I am pretty sure that this is a problem with CPU-Z and there is nothing at all wrong with your board.

If you want a second opinion, give RealTemp a try. Another user was having this exact same problem a week or so ago. RealTemp did not show anything unusual with his BCLK. His board was fine.

RealTemp 3.70
http://www.techpowerup.com/downloads/2089/real-temp-3-70/

If you want an even more accurate look at your BCLK then check out the updated version of RealTemp.

RealTemp T|I Edition
https://drive.google.com/open?id=0B0dpSo9k93jDZlpmbHNzeFlpcWc&authuser=0

ThrottleStop can also measure the BCLK very accurately. Each time you click on the BCLK button, it will resample your MHz.

ThrottleStop 8.00
https://drive.google.com/open?id=0B0dpSo9k93jDNWtRVEZVUGVpdGM&authuser=0

Accurate timing in Windows can be a little flaky. Many of the monitoring timers are shared so one monitoring program can interfere with another program. Some screenshots would be interesting.

Edit - My laptop reads 99.769 MHz for the BCLK and it doesn't budge.

OewuyWM.png

But the problem is with the OCCT logger too?
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post #27 of 30
The problem is that too many monitoring tools share the same code. A bug in one is a bug for all.
Some monitoring tools are unique. I posted a couple of them.

Here is another thread from 2 weeks ago with the exact same problem. Asrock board this time. There are going to be a lot of reports of bad boards if some popular monitoring software isn't updated.

http://www.overclock.net/t/1557325/bus-speed-drops-under-load
post #28 of 30
Thread Starter 
Hey maybe you are right- I did small test and here are the results:

idle


load


Now the question is- which one of those programs should I belive. I guess not Windows Task Manager for sure xD
Edited by MagicalCauldron - 6/8/15 at 10:26am
post #29 of 30
When a CPU is lightly loaded, the BCLK is steady but the CPU multiplier can be changing hundreds of times a second. When different programs are sampling the CPU at slightly different times, you shouldn't see a huge difference but it is not unusual to be seeing some differences in total MHz. Idle testing is not important.

RealTemp T|I reports the BCLK to 3 significant digits because the BCLK it reports is usually accurate to 3 significant digits. The majority of the time you will rarely see a variation of +/- 0.001 MHz in the BCLK that it reports, especially when loaded. It is far steadier at 3 digits compared to any other program.

Intel XTU also agrees that your CPU is running at 4.40 GHz. Not surprisingly, Intel follows the Intel recommended monitoring method. It might show your CPU speed wandering around when lightly loaded just like RealTemp has always shown because they use similar monitoring methods. CPU-Z and any program using a similar method or the same method as CPU-Z uses is wrong. I don't yet understand why CPU-Z works very accurately on most boards but is reporting a significantly reduced BCLK on other boards.

ThrottleStop uses a slightly different method. Knowing that the true BCLK a processor runs at is extremely steady, I thought it would be better to accurately measure the BCLK once, and then if a user wants to update this, they can manually click on the BCLK button as many times as they like or as fast as they like. With each click on that button, the BCLK is recalculated. I think it takes about 0.1 seconds for each click.

The Task manager is still a work in progress. It was a good effort but it still has some significant issues. You would figure with Microsoft's unlimited budget that they could put in a little more effort here but I guess, why bother.

If you are still not a believer, try running the RealTemp - XS Bench at a few different speeds. This is a very simple single threaded test and the benchmark scores vary proportional to MHz. You could use ThrottleStop to adjust your CPU from 4400 MHz to 4000 MHz or boot up at the default speed for your CPU when CPU-Z is reporting a 100 MHz BCLK. At each speed, run the RealTemp - XS Bench a few times. A 10% increase in CPU speed should show up very close to a 10% increase in your XS Bench score. I am not sure if that will truly prove anything but you would have some consistent numbers that you might be able to compare to other users with different boards and the same CPU.
post #30 of 30
hello. I know this is an old thread now, but I am having the same behavior. I have a 4690k as well, on an asrock z97e-itx, with watercooling. I've had it at 4.5 ghz for the last 18 months, perfectly stable 100x45. this computer is used every day. just the other day, out of the blue, the bclk is no longer 100 MHz, and now varies between 97.2 and 99.9 MHz, which at 45 multiplier could be 100 - 200 MHz lost on clock speed. under load, it balances out at 97.8 and just sits there. spread spectrum is set to "disabled", I have 5 levels of loadline calibration, which I've tried all of them (and even disabled), nothing helps. the program I am using is CPU-z, which the post above says it could be wrong, but this change happened very suddenly. I doubt cpu-z suddenly decided it no longer wanted to properly read my cpu. realtemp T|I reports 100.000, though and I've never seen it change there. normally I don't mind attributing something to a faulty program reading wrong, but I find this strange.

on a side note, task manager has ALWAYS read my cpu speed at about 4.4 ghz, about 100 MHz low. I just figured task manager in windows 8.1 and 10 isn't very reliable.

If there is something going on here, or if we know for an absolute fact that realtemp t|I is reading correctly at 100.000, i'd like to figure out which is true.

EDIT: I forgot to mention. bclk reads the same readings when I change to stock clocks, by resetting bios to default. newest bios version for my motherboard.

thank you.
Edited by Devogod - 2/14/16 at 6:50am
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