How does it look?

[paradisiac]

how does this compare to other i7 920's?
reason i ask is im using a x19 multiplier and others are using x20/x21 so wondered if it made a difference.

CPU Clok ratio 19x
QPI Link speed x36
Baseclock 211
Performance Enhance - standard
XMP disabled
System memory multiplyer SPD - 8.0
intel turbo boost - enabled
Cpu cores enabled - all
CPU multithreading - enabled
C1e , C3/c6/c7, thermal, EIST and PROCHOT all disabled
Virtualization - enabled.
Uncore freqency x16
Isochronous supprot - enabled
PCI frequency - 100
CIAZ -disabled
CPU clockdrive 800Mv
PIC Express clock drive 900Mc
CPU cliock skew 100ps
IOH clock skew 0ps

Local-line calibration - disabled
CPU Vcore 1.300V
QPI/VTT coltage 1.295v
IOH Core 1.16V
DRAM Voltage 1.640v

everthing else is as at default / auto

Ram : 8-8-8-20-1
Max Temp Under Load : 78

Spec : i7 920 D0 @ 4.0GHz, Arctic Freezer 7, GA-X58-UD3R, TEAM XTREEM 6GB DDR3-1866 TRI CHANNEL, 9800GTX+, Samsung SpinPoint F1 HD103UJ 1TB, Hitatchi HDT721050SLA360 500GB, Maxtor STM3500418AS 500GB, NZXT BETA Case, Windows 7 Ultimate 64 bit, 42" LCD TV

Res : 1800x1018

CPU-Z

3d mark 06

3d mark vantage

passmark

fritz chess benchmark

super pi

cinebench

any comments welcome.

 

[paradisiac]

no one got any ideas if the x19 multiplier makes a better/worse overclock?

 

[Marine Iguana]

I couldn't get mine stable with a 19x multi so i use the 21x but different chips, different mobo's will always get different results. If it works for you then you always know you can have a little extra with 20/21x multi if you want to go higher

 

[ejr22]

I don't think it makes much difference. Remember that not all CPUs are identical so x19 might be better for some CPUs and x20 for others. There really is no absolute answer to this - 4GHz is 4GHz no matter which multiplier + BCLK setting you use to achieve it. As long as you are happy and your overclock is stable then it really doesn't matter.

Of course, one thing it wil have an impact on is your RAM speeds due to the different BCLK setting needed to reach 4GHz on each multiplier.

 

[JonJ678]

You could argue that 19x210 is a better overclock than 21x191 as it pushes the other bsck dependent circuitry harder. The difference is likely to be minimal.

However despite the large number of screen shots above, there is no sign of stability testing. As such I must conclude that it's an untested 4ghz, and as such much less interesting.

Why did you start a new thread instead of continuing here?

 

[Marine Iguana]

However despite the large number of screen shots above, there is no sign of stability testing. As such I must conclude that it's an untested 4ghz, and as such much less interesting.

Hes doing what i do i have never run prime on any overclock i have ever done

 

[JonJ678]

You do run folding at home on it though, which probably achieves the same result

 

[Marine Iguana]

You do run folding at home on it though, which probably achieves the same result

Shh don't tell em

 

[paradisiac]

i have done plenty of stress tests with OCCT to make sure its stable, but OCCT doesnt really give anything useful at then end that i understand, just some graphs. i know its stable, as its been tested and i have been using it for what i normally do and have found no issues at all with it.

 

[JonJ678]

*bangs head against wall*

 

[paradisiac]

Why did you start a new thread instead of continuing here?

because in this thread i was hoping to find out how the different multipliers effected the performance, not asking why mine is only stable with a x19 multipier and why i cant get it to work with higher ones, which is what that thread was. sorry if that was the wrong thing to do.

 

[paradisiac]

*bangs head against wall*

so you are saying OCCT is not appropriate for stress testing stability??

 

[JonJ678]

In short, it is not sufficient, no.

 

[paradisiac]

ok fair enough, dont see why not as it puts 100% load on the cpu, so if there was instability surely it would pick it up, but heyho. i have had it running fine now for days without issues, so im happy its stable, even if i dont have a prime95 screenshot to tell me it is.

 

[JonJ678]

I wish you the best of luck with this approach, and recommend you keep backups.

Perhaps you would like to think of a reason why a system can pass prime 95 for 24 hours yet fail intel burn test, and another system can pass intel burn test for 24 hours yet fail in prime 95. If you'd like a really difficult question, why can some computers pass both ibt, and prime 95 (in all three varieties), yet crash in normal use.

As an example, this is my system, and it was not stable in normal use with these settings even though it passed ibt.

 

[paradisiac]

but if it works for everyday tasks does it matter?
im a bit confused, surely there is no way of saying any pc is stable then, if different tests fail whilst others pass, but if it works for what you need it for, does that not then make it stable for your needs?
i have used it to encode video, i have played games, i have watched films and listened to music and so far i have had no signs of a problem, so does this not therefore mean, in my situation, its stable for what i do?

 

[JonJ678]

It's a different definition. I think a cpu is stable if whenever it is asked a given question, it gives the same answer. You think a cpu is stable if it doesn't make enough of an error to bring windows down.

If it "works" for every day tasks yet makes millions of tiny mistakes that lead to data corruption, and resolving said data corruption takes longer than testing it properly in the first place, then I can't see how running an unstable system can be a good thing. Would it annoy you if one of the dvd rips corrupted?

Stability tests will show if it can do a certain task, say calculating prime numbers or solving simultaneous equations, without error. Passing one of these lets you say with reasonable certainty that it'll pass the same test next time too. The closest you can come to knowing your system is stable is ensuring it passes every stability test you have available, and then keep an eye on it in normal use. If it crashes, consider that it may not be stable.

In the screenshotted example, it would pass prime or ibt but not cope with my version of every day use. Specifically if I moved more than 4gb or so of data into the ram in a short period of time it froze and needed to be reset. I use virtual machines a lot, so this was unfortunate, and it's down to 200x20 for the time being.

 

[paradisiac]

so you are suggesting 24hours with prime, intelburn and OCCT, aswell as memtest86+ added with a week or so of everyday use, would constitute a stable pc?

 

[JonJ678]

I'm suggesting that's the best we can do at this time.

I tend to run ibt when increasing bsck until I can't get through ten loops of that, then work on getting that clock ten loops stable before increasing bsck again. However once at whatever target I had in mind, say 200x20, I'll stability test as thoroughly as I can. The 4ghz I'm running now has spent a weeks or so undergoing various stability tests, and has spent much of its remaining time running folding@home in the background.

So I trust the 4ghz clock exactly as much as I'd trust a stock speed computer, but I won't use the 4.4ghz for anything important until I can get it more stable than it currently is. Going to try improving temperatures as the next step I think.

 

[paradisiac]

i dont want to go over 4GHz, and am pretty sure im stable, dont quite get prime as never used it, doing a blend torture test, will a few hours be ok or does it need to be 24hours?
also what is considered good for OCCT and intelburn, i have been doing 8-10hours OCCT, intelburn i have only briefly used before, but was a while ago.