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Need help overclocking i7 940 (Read 6463 times)
Reply #30 - Jan 23rd, 2009 at 3:58pm

stevehookem   Offline
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Hello!

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What is the "video from NCIX"? I can't find that.
 

i7 940 at 4.0ghz • Asus P6T Deluxe • 6gb OCZ Gold 1600 • BFG 285 Superclocked • Velociraptor 300gb HD • LG BlueRay Burner • Thermalright 120 cooler • PC Power 750W PS • Antec 1200 • Windows XP 64
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Reply #31 - Jan 23rd, 2009 at 5:41pm

wsciutti   Offline
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Nick,

Thank you for the info that I might pass OCCT but still fail in FSX. I raised the vcore a notch, 1.40, and am now stable at 4Gh.

You were also very right about 'heavy metal' in your earlier guidelines to the i7; I have never flowm the LvLD 767 with frames locked at 30 and auto and scenery at max with a fluid ride.

system: i7 920@4Gh
            Mushkin 1600 7-8-7-7-20
            Raptor 150 MB drive
           260 EVGA card
           Noctua cooling
           Antec 900 case
           Max temp under OOCT load: 74C, room@70F

Your knowledge is much appreciated.

Jack S

Smiley

PS followed the posts last night - nice to see the individual is not around!!!
 
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Reply #32 - Jan 23rd, 2009 at 5:44pm

wsciutti   Offline
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Forgot: ASUS P6T version 2 (it is different than ver 1 which I had to RMA)

Jack
 
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Reply #33 - Jan 23rd, 2009 at 7:36pm

NickN   Offline
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FSX runs fine... the problem
is you or your system

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So I assume you are fine now Jack?


you dais you are stable @ 4Ghz.. and that includes FSX now?
 
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Reply #34 - Jan 23rd, 2009 at 7:40pm

NickN   Offline
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FSX runs fine... the problem
is you or your system

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dvpro wrote on Jan 23rd, 2009 at 12:35am:
[quote author=NickN link=1229353222/15#26 date=1232680899]QPI/DRAM VOLTAGE 1.35v
done


DRAM VOLTAGE: 1.65 or 1.66v
Would keep putting it back to 1.66 when I attempted to change to 1.65


you have temp problem.. LOAD LINE CALIBRATION: ENABLED
Done

and work Vcore to the lowest point where it is stable with the QPI/DRAM voltage I listed above

Somewhere between 1.34 and 1.40v
I set it to 1.3812...but I guess I don't know what stable means. Should I raise it...than load test, or lower it than test?


If you can not get it to run stable at 80c or less your cooling solution is not doing the job.. either alignment or not flat  
eeerrr... I did a few tests...apparently the fan was on backwards. I followed the terrible crappy photo copy instructions that came with the HS. The case fans are blowing out and the HS fan was blowing in...therefor not much air was flowing over the sink. I replaced it (not how the picture shows) and with the settings you had me do...I passed. see the results. Note, at the same clock, I couldn't get that load test for more than a few minutes


Also, ambient temp where you are will effect the high end.. if its warm it will be harder to keep it 80c and under
Room temp is about 68F.[/
quote]

Have a look at this:
[img]

As you can see...I barley made it, but why the big difference in core temps between Real Temp and OCCT? Which one is accurate? It was like that the entire load test. It seems like I am just barley able to make 4 gigs...Was kinda hopin for 4.2
Do you see anything wrong?
Thanks


Stable means if passes the test ..

It can be stable and not pas the test due to hitting 80c and the test fails because you SET the temp in OCCt to shut down the test if it gets too hot

UNStable means it did not go past 80c (remained under 80c) and failed the OCCT test.. this would indicate more Vcore is needed or one of the other voltages needs to be adjusted, the memory speed is too high above what it is rated for


OK I see you made it by the skin of your teeth so you better keep an eye on that temp as the seasons change

Assuming that heatsink was installed correctly then thats the best you are going to do..


 
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Reply #35 - Jan 23rd, 2009 at 10:04pm

wsciutti   Offline
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Nick,

Yes, thank you for checking. Frankly, I think the load temp was fairly good  due to my following your thermal paste suggestion: spread onion skin thin with razor blade.  Cheesy

  Jack

PS: Your suggestion to RMA the original Mushkin RAM was also dead on; they replaced it very fast.
 
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Reply #36 - Jan 24th, 2009 at 9:56am

jwenham   Offline
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wsciutti, I more or less have the samae system as you and thought I would give you my settings and see if that helps your temps a little more. I am at 4050 Ghz and the max temp I saw running OCCT for 1 hour was 74 C.

I have made all the adjustments in the BIOS reguarding the CPU as far as Speed Step, Load Line Calibration, ect.

CPU Ratio : I use 21X

BCLK : 193  ( 193 x 21= 4050ghz)

CPU Voltage: 1.35

QPI/Dram Voltage: 1.3125

Dram Bus Voltage: 1.64

I have tried all sorts of combinations and different CPU multipliers and this is what works for me. It also allows me to run my memory very close to full speed. My memory is 1600 rated and I have it running at 1543 Mhz.
 

Intel i7 940 2.93 clocked to 4.0ghz Asus P6T Deluxe 6gb OCZ 1600 8-8-8-24 EVGA GTX 260 Superclocked Edition Thermalright 120 CPU Cooler Power PC & Cooling 750w PSU 1 tb Seagate Barracuda HD 500 gb Seagate Barracude HD 22" Viewsonic Widescreen Track IR 4 XP Pro x64 www.fairtax.org
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Reply #37 - Jan 24th, 2009 at 12:14pm

wsciutti   Offline
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J,

Thanks for the reply. I am locked at 20 with the 920 but I guess you read my mind.

I'm using 20x197=3.5 Gh and the RAM is at 1573 so I'm pretty close. The 4.0 Gh turned out to be unstable in FSX but so far she seems to be stable and I ran RealTemp in the background as a check - max was 63C.

I may have one of the chips AnandTech talked about.

I was also able to drop the vcore to 1.36 which helps with the temp.

I do believe a 940 is in my future somewhere - wish I had read Nick's suggestions sooner but $ were/are an issue.

Jack
 
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