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How to run LinPack stress test(LinX/IBT)properly-an explanation(maybe a guide) - Page 9

post #81 of 128
Quote:
Originally Posted by boy_lah View Post
With my i7 4Ghz and with HT ON - I was getting 51gflops vs my calculate 64 so about 80%.
But with HT turned OFF - I now get about 58gflops ie. about 90%.

So my question is am I meant to turn off HT? Will I not get the calculated gflops with HT turned on? Note, turbo and all energy saving settings are OFF.

And finally, my gflops are not 'identical' each run, slight fluctuations. Is that normal or does that mean I continue to have issues?

Oh - with HT off, I'm seeing a drop of 8-10'C in temps. I'm only using my 4.2Ghz with HT off. Otherwise it's too hot for me.
i had forgotten Jimmy has HT off for his tests.

I have HT enabled, and that's probably why I'm only seeing 52.7gflops @ 21x192 BCLK

Well as long as its happening to someone else I assume it's an OK index?
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post #82 of 128
Quote:
Originally Posted by krescent View Post

at 4.0ghz OC i can get about 53 gflops---nothing compared to jimmy's 61!!
53 GigaFlops is a very good result (the average being 50-51-52 at best) GigaFlops at 4.0 Ghz with HypherThreading Enabled.

Try disabling HyperThreading and you should bee able to see 60+ GigaFlops easy
post #83 of 128
Quote:
Originally Posted by boy_lah View Post
Your load temps and delta are pretty much what I'm seeing.
Your idle are however far lower than mine. I'm at ~40'C for idle.
My ambient is about 20-22'C
Hehe, those were Jimmy's temps at an unknown (yet) ambient temperature, not mine

Do you have those "~40" temps with HT ON or OFF ?
Could you please be more specific as : min Core temp = ?! ; max Core temp = !?
(idle & full load, HT ON/OFF? and please mention the CPU Voltage)

~40 could mean 49 too (not really but you get the point)

I've confirmation (like I needed it) that my Megahalem is chipped (severely) and that seriously puts me down and somehow explains the awkward temps.


P.S.

And NO, it's not factory chipped but "manually" by the "professionals" I bought it from aka they had been using it extensively prior to selling it.
Retailers in my country are just dreamy
post #84 of 128
Quote:
Originally Posted by Kargeras View Post
53 GigaFlops is a very good result (the average being 50-51-52 at best) GigaFlops at 4.0 Ghz with HypherThreading Enabled.

Try disabling HyperThreading and you should bee able to see 60+ GigaFlops easy
Too bad I can't get passed 5 runs---21x192, 1.318vcore, 1.2625qpi--- without a fail




question: if I can get 16 passes OK (which takes about 60min) and the 17th failed,doing it PROPERLY, is that acceptable?

Since OC guides recommend 20x (but not done properly), would a properly ran linx require less passes?
OP says >=10runs, atleast 30 min. How do u guys feel?



EDIT: upped vcore to 1.331 (bios) and 16.5 passes/1hr 10min I failed. Should a stable clock run 24/7? OP:

Quote:
In fact a test may fail due to reasons unrelated to your oc settings,but discussing the reasons needs another thread.

Edited by krescent - 5/12/10 at 8:32pm
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post #85 of 128
1.331 volts...what CPU is that ? 920 C0 or D0 ? The voltages are quite high for a D0.

Failing LinX is not quite acceptable (especially 5-20 passes).
Same thing for Prime95 for 12h+ (some - including myself - recommend 24h+ with no fail).

CPU voltage is not the only one that should be raised, what are your CPU PLL and QPI voltages ?
post #86 of 128
Quote:
Originally Posted by Kargeras View Post
1.331 volts...what CPU is that ? 920 C0 or D0 ? The voltages are quite high for a D0.

Failing LinX is not quite acceptable (especially 5-20 passes).
Same thing for Prime95 for 12h+ (some - including myself - recommend 24h+ with no fail).

CPU voltage is not the only one that should be raised, what are your CPU PLL and QPI voltages ?
I have an i7 930, not 920. I've noticed that these require somewhat higher voltages than their cousins. However bringing my clock down 1x allowed me to lower things somewhat. Current stats:

191x21, 1.312 vcore (cpu-z reading), 1.86pll, 1.2687 qpi

20x linx 5200MB properly, 52.4 mean GFlops, Safe mode.
Speedfan has CPU temp at 68 C, cores more like 65. Can't run realtemp in safemode.

seems to be the best I can do so far. Ultimate goal is 202x21 but that will wait until I get my new TIM.
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post #87 of 128
I don't advise running overclock settings in Safe Mode in order to check for stability for the simple reason that 99% of the time you'll be running in "standard" mode.
Safe Mode was/is recommended just to check the max theoretical GigaFlops of your machine (hence "standard mode" will include some "unwanted" services, apps etc..not to verify stability).

930 is said to run at higher voltages indeed but hence I don't have any first hand experience with it can't advise you in that direction.

You might want to try 1.88 PLL (the max recommended for that particular setting) and also try reading this :

http://www.overclock.net/intel-cpus/...920-930-a.html

What TIM are you currently using ?

P.S.

And yes, I underline again the fact that you should check for stability in normal ("standard") Windows mode.
Run in Safe Mode or disable if you will some services and close some apps ONLY if you wish to check your max GigaFlops in LinX - which can also be done by running 3-5 passes (far from the number recommended for stability).
Edited by Kargeras - 5/13/10 at 3:25am
post #88 of 128
hi Kargeras / Krescent,

My 930 is one of the 'good' batches apparently - 3912C699.

4Ghz @ 191x21 @ 1.24 (cpu-z load)
HT ON
Idle: 41 39 42 38
Load: 73 72 72 68 <---first core always hottest
Ambient ~20-22'C

4.2Ghz @ 200x21 @ 1.28 (cpu-z load)
HT OFF
Temps: I didn't write them down but pretty similar to above. Main thing is I had to turn the HT OFF to keep things at my target max temp of under 75'C.

Load temps are using IBT. I note Prime95 is about 2-3'C LESS. IBT is run in standard win with most of my apps turned off.

TIM is TX-2 although I have TX-3 yet to be used.

Other settings are constant:
- QPI/VTT 1.2
- PLL 1.8, IOH 1.2, ICH 1.1
- DRAM 1.66 @ stock speeds 9-9-9-27
- mem 1541, uncore to 3082, QPI link lowest setting
- LLC ON, Energy saving off, Turbo off, Spread off

I have managed to run 60 runs of IBT (properly done) for my 4Ghz setting. 4.2Ghz has done about 18 runs but I find that if it passes 10 then I'm usually good.

I used THIS guide to help me OC - the best one I've found as it's about the 'strategy' and isolating one tweak from the other. Else you chase your own tail.
Edited by boy_lah - 5/13/10 at 11:01pm
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post #89 of 128
man awesome voltage.

Mine seems to be pretty average---which is fine BUT......WHY ME?! haha.


@Kargeras
I was thinking the same thing about safe mode. Well either way, I'm in prime right now going on 10.5 hrs in standard mode errorless, times mid-low 70s with 75max


going to read over that guide boy lah posted and see if I cant drop my voltages.

I'm using the out-of-box TIM that came with my h50--Shin Etsu. I hear its one of the best, except that they slather on way too much on when its shipped. Just recieved some new shin etsu--should bring my temps down quite a bit once i get something to wipe off the old *****..
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post #90 of 128
When "talking temps" please mention HT On/Off (being a 10 degrees gap between the two) and secondary, CPU Voltage.

So, in your case what are the two ?
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