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Help a newbie with an odd i7 960 issue

post #1 of 12
Thread Starter 
So having just decided to play around with overclocking my machine and scouring around for guides and how-tos I have hit a very strange brick wall which no amount of interwebs searching can seem to find me an answer for. So I've decided to create an account and hopefully get some help from the uber overclockers.

I decided to start simple and just use the built in gigabyte tools to start off with and then perhaps play from there.
http://oi43.tinypic.com/24fige1.jpg
That SS there shows easytune6, CoreTemp and CPU-Z however the readings for my CPU speed differ. Both bios and CoreTemp say the 160 BCLK (for 4Ghz) where as easytune and CPU-Z say 140BCLK
When i searched for this problem of different readings many pointed to 'speedstepping' and C1E features being the cause. However I not only get the same results under full load with prime95 (which would eliminate speedstepping) I also get the same results with both features turned off. Also the fact that from what i read both of those affect the multiplier and not the BCLK where the difference i am seeing lies.

It seems no matter what i change the bclk to in my bios (within reason haven't tried over 160 yet) the system will boot up fine and stable but only read 140. Even taking the steps to see my highest available bclk by lowering other mulitpliers and increasing that testing for stability i still only get 140 (although the new multiplier takes effect and it reads 140x12).

The fact that my BIOS and coretemp read one thing but cpu-z and other windows based ones don't have me quite confused.
I case it helps some basic system info (can find out more if needed)
CPU - i7 960
MB - G1.Assassin
RAM - 3x 4gb corsair vengeance 9-9-9-24 1.5v
post #2 of 12
i dont now much about the i7 but couldnt it be the same as vdrop and vdroup wereby the voltage differance is caused by the programms taking readings from 2 differnt places
ie the bios is reading from the board and cpu-z and easytune from the operating system?
    
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post #3 of 12
Thread Starter 
If it is a case of just reading things different which one is correct? As I said completely new to this and haven't been able to find any similar problems in a fair bit of searching so have absolutely no clue as to what is going on.
post #4 of 12
Quote:
Originally Posted by theangryllama View Post
If it is a case of just reading things different which one is correct? As I said completely new to this and haven't been able to find any similar problems in a fair bit of searching so have absolutely no clue as to what is going on.
i'll always trust bios to be honest...

btw, do different programs show different bclk readings even when your 960 is at stock?
post #5 of 12
Thread Starter 
Quote:
Originally Posted by erik257 View Post
i'll always trust bios to be honest...

btw, do different programs show different bclk readings even when your 960 is at stock?
See told you i was new to this whole thing... can't believe i didn't check that
at stock (putting it back down to 133) CPU-Z shows the same readings of 140x25... seems my pc just doesn't like cpu-z and i have made sure i have the latest version available
Edited by theangryllama - 11/2/11 at 6:18am
post #6 of 12
I would try a few different programs to read the settings. Its strange that Easytune is doing it, but it could be that both easy tune and cpu-z are getting the same incorrect readings.
CoreTemp may be pulling its info from somewhere else, so I would try programs like Everest, Real Temp, HWMonitor etc and see if you get different readings.

Also if you go to Start Menu > Control Panel > System it will show your current cpu and frequency

I would also try contacting Gigabyte and see if they have any answers for you

But if you set it in bios, and get the reading in Core Temp and System info then I'd say that CPU-Z & ET6 are not correct readings
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post #7 of 12
Thread Starter 
Now I'm even more confused. System info says core i7 960@3.2GHz, 4032MHz.
I found the option to view system information in coretemp and it now says 140 bclk (3500MHz), realtemp said 4200MHz (playing around again to see if it would boot higher) but while doing the XS bench option i can see it drop to 3.5 and then back up to 4.2. Can't find where in HWmonitor my cpu speed is located and AIDA64 (which is apparently the new version of everest that you said to check) tells me 3500MHz with 140bclk.

Different readings everywhere!
post #8 of 12
Quote:
Originally Posted by theangryllama View Post
See told you i was new to this whole thing... can't believe i didn't check that
at stock (putting it back down to 133) CPU-Z shows the same readings of 140x25... seems my pc just doesn't like cpu-z and i have made sure i have the latest version available
hmm, that's weird...cpu-z has always worked fine for me, i've only owned 1 gigabyte board before, so can't really comment on easytune. but the fact that gigabyte's own software can't read the bclk frequency properly worries me...but like i said, whatever you set in bios should be what you're chip is running at.

have you tried updating your bios btw? i've seen quite a few release from gigabyte for your board, worth a try i guess
post #9 of 12
Yeah, there is a F5b beta bios available, maybe try flashing to that and see if it helps.

Its strange you get all those different readings. I would try contacting Gigabyte and tell them you get various readings from programs and see if its an issue they are aware of

Dont mention overclocking to them however, tell them the issues are at stock but not related to speedstep or any downclocking option, just that you get a different reading from each program..
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post #10 of 12
Thread Starter 
Well weird multiple reading issue aside my biggest problem is learning which one is the correct one. How accurate is the benchmark test of Prime95?
Out of interest I ran it while at 4.2 (according to bios) and then reset my PC and changed bios to 3.5 (the reading programs are giving).
The times were lower the first time around leading me to believe that the BIOS is correct as you would expect and that the processor is running quicker, however is this test an accurate measure or does it fluctuate?
Times are as follows taking the 8thread/4core results all others are saved if needed
4.2
Timing FFTs using 8 threads on 4 physical CPUs.
Best time for 768K FFT length: 2.757 ms., avg: 2.815 ms.
Best time for 896K FFT length: 2.802 ms., avg: 3.369 ms.
Best time for 1024K FFT length: 3.878 ms., avg: 4.271 ms.
Best time for 1280K FFT length: 4.362 ms., avg: 4.451 ms.
Best time for 1536K FFT length: 5.334 ms., avg: 5.402 ms.
Best time for 1792K FFT length: 6.490 ms., avg: 6.559 ms.
Best time for 2048K FFT length: 8.061 ms., avg: 8.120 ms.
Best time for 2560K FFT length: 9.525 ms., avg: 10.124 ms.
Best time for 3072K FFT length: 12.647 ms., avg: 13.102 ms.
Best time for 3584K FFT length: 14.255 ms., avg: 16.500 ms.
Best time for 4096K FFT length: 17.458 ms., avg: 17.607 ms.
Best time for 5120K FFT length: 22.844 ms., avg: 23.217 ms.
Best time for 6144K FFT length: 28.129 ms., avg: 28.320 ms.
Best time for 7168K FFT length: 34.513 ms., avg: 35.795 ms.
Best time for 8192K FFT length: 37.805 ms., avg: 39.008 ms.

3.5
Timing FFTs using 8 threads on 4 physical CPUs.
Best time for 768K FFT length: 3.334 ms., avg: 3.702 ms.
Best time for 896K FFT length: 3.394 ms., avg: 3.689 ms.
Best time for 1024K FFT length: 4.690 ms., avg: 4.854 ms.
Best time for 1280K FFT length: 5.265 ms., avg: 5.880 ms.
Best time for 1536K FFT length: 6.378 ms., avg: 6.574 ms.
Best time for 1792K FFT length: 7.809 ms., avg: 8.266 ms.
Best time for 2048K FFT length: 9.641 ms., avg: 10.197 ms.
Best time for 2560K FFT length: 11.469 ms., avg: 11.727 ms.
Best time for 3072K FFT length: 15.153 ms., avg: 16.389 ms.
Best time for 3584K FFT length: 17.043 ms., avg: 17.372 ms.
Best time for 4096K FFT length: 20.996 ms., avg: 21.701 ms.
Best time for 5120K FFT length: 27.267 ms., avg: 27.810 ms.
Best time for 6144K FFT length: 33.789 ms., avg: 34.070 ms.
Best time for 7168K FFT length: 41.879 ms., avg: 42.120 ms.
Best time for 8192K FFT length: 45.312 ms., avg: 48.043 ms.
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