PII 940 OC Log

xtc28

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I started this thread really to answer another OPs question about how well a Phenom II 940 Overclocks in comparison to a PII 550. Well I thought about it and it was just a click away. MY first remarks were for a previous 3DMARK Vantage score. This score was lacking in just the fact that it was using a GTX 280 and its synthetics were way to high.

bench.jpg


PII940 @ 3.4Ghz Thermal Take Spin-Q cooled
GA-MA790x-UD4P Motherboard
4 Gigs DDR2 XMS2 Extreme 800
GTX 280 @ 666 MHZ
A-Power 850W Power Supply

I went on to install a fresh copy of Vista X64 (my other install was all cracked up.) Since the time of the original bench with the GTX 280 I have upgraded to a Diamond ATI Radeon HD4870x2. Its OCed clocks are 800Mhz core and 955Mhz RAM.

So the following tests will be done @ 3.4, 3.6, 3.7, 3.8 Ghz On the cpu and stock clocks on the Graphics card. I am fairly certain I can obtain certain I can obtain 3.8 on Air.

My PII Runs at 3.4 most of the time and so I left it there and ran a bench With Vantage. To run stable here all that is required is raising the Multiplier to a 17x and leaving the HT ref. clock at 200, this attains the 3400Mhz . I also raise the cpu core voltage to 1.375 at this point, and upped the HT to 2000 Mhz. Other than that nothing else has changed from stock.

ndrun.jpg


2ndrunresults.jpg


After seeing these results I imediately I OCed to 3.6Ghz. I Raised the Multiplier to 18x and upped the voltage to 1.40v. I had stability issues With HT at 2000Mhz so dropped it to 1800Mhz and ran the next bench.

3rdrun.jpg


Next I Raised to the Clocks again this time to 3.8Ghz by only raising Multi to 19x. This caused severe problems and it would not bench..... BSOD!
So I lowered it to an 18.5x Multi and raised corev to 1.4125v, BSOD. Thought about it for a moment and "OH YEAH" I forgot that it doesnt like 1800mhz HT at this clock it must have 2000Mhz HT to be stable. I also wanted to try stock diamond speeds on the HD 4870x2. It worked! I benched here.

fourthrunstockGPUClocks.jpg


Thats all for tonight people! Ill do some more tomorrow!
 

xtc28

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I understand that and I have read this myself. I have in the past ran my 940 @ 3.9 stable on air. At that time I was using different ram and a diffrent cooler. As for the above statement being true for all PII 940 nprocessors, it is not. Some will clock higher stably. This is a test of mine not Toms. Also, to me this is a good test of the Radeon HD 4870x2 With the PII 940.
 

xtc28

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Well, as for the 39000+ score.................. That was a score accelerated by the GTX 280 I previously had. The Cuda/Physx is the culprit there. This is the synthetic score that was "Way to high".

I found the max bench on air last night on ths setup with the Thermal Take Spin-Q. I ran Prime 95 for an hour and 5 min and at that mark I got a BSOD. I lowered HT and NB back to 1800mhz and upped the volts on the CPU to 1.456. I ran another instance of Prime95, it passed all night at this OC.

6thrunvoltsup.jpg


CPUValidation3725Mhz.jpg


At this point I have Lapped My 940 becuase it was not flat at all. It had a crown in center, Low valley all the way around the crown and high edges.

Previous temps before the lapping.

PIItemp36Ghz.jpg


Oh no! My Temp sensors quit working in windows. I gotta figure this one out. It works in bios but in windows it doesnt. Hmmmmmmmmmmmm. Here we go again!
 

sid_nag17

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yeah i figured that later!!! any ways nice oc i personally dont like feeding higher volts but just for checking i hit 3.66 highest stable with descent temps could go higher but temps would be like crazy!
 

xtc28

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Stability becomes a big issue when not overvolted at 3.5 and above on my system. I wish I were able to get these clocks on stock volts but, alas it will not work.
 

videl

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xtc28, are you using vista or windows 7? and is it 32 or 64 bit?
in windows 7 64 my score for the first CPU test is high but for the second test it's low...(in Vantage)
yours is high in both...I think the OS could possibly impact this...any thoughts? I'll post the screen shots later...
 

videl

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This is what I mean...compare your results to mine...
The graphics are on stock (4850)
CPU is overclocked to 3.4Ghz
On Windows 7 64 bit

results.png


Any thoughts? maybe I need to reinstall windows, maybe I'll try vista too...
 

xtc28

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Right now these scores are all in Vista 64. Tonight I am installing Xp 32 and 64, Vista 32, Win7 32 and 64. I will try to bench with 3DMARK06, Vantage, and Everest in all OSes tonight, but Im really not sure if I can get them done all tonight. Like you I am very curiuos as to how the operating system affects the scores. As far As I know you are using an unlocked 550 x4 your CPU scores are pretty darn good for this fact. The last Bench was done at over 3.7 Ghz. I was not happy with my scores for this clock. Yours also beats mine in 06 on the cpu from 3 ghz to 3.4 Ghz. I think you got a hell of a deal on that 550.
 

xtc28

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PII9403ghzLappedIdle.jpg


Well I got it to display temp again. That is until I benched once. Came back and it was gone...... Oh no I think Ive burnt out the temp sensor.
 

xtc28

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Yes I forgot to say this was with it Lapped and finished with 2000 GRIT sandpaper. I took about 4.5 hours out of mt night on thurs to do it. It was a pain, but worth it. Im not too worried about the temp sensor issue because inside of bios I can see it running at 24C @ Idle it displayed 27 and stopped working @ 41C, according to OCCT. Now in AOD it shows -237C WOW I wish! Before thelapping I was able to load @ 62C max with My highest clocks. NOW Ill never know...lol.
 

overshocked

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Nice lapping... after you lapp it is a good idea to do one last run with toothpast... yes toothpaste, because it will give it that last nice shine :na:



LOL thx, i finally got everything figured out with ryan... im never gunna post a cracked cd-key again :pfff: :non: :lol: :lol:
 

overshocked

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Ha... that was a short bench session. Temps got extremely high upwards of 70c because i had to use 1.8v.

But like i said before im working on a phase change right now so... i hope i can look forward to over 5Ghz :ouch:
 

overshocked

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Or, maybe i can reach over 5ghz with this heatsink im making.

I'm using a grill for a phase change and im going to cap the end of the pipes...so in the end it will look like a massive heatsink that has 20 heatpipes where as they normally have 4. LOL this will be great...

Here are some pics

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1000757.jpg


 

overshocked

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LOL its the evaporator for an ac unit, i didnt need it for my phase change so i thought

what the hell, lets make a kick ass heatsink!

I'm not really going to hide it because im only going to use it for a short bench session to get above 5 Ghz on air.

Because the reccord is sunthin like 5.13 so im pretty close!
 

overshocked

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Yeah, i will.

as long as we can keep this thread allive ill keep posting pics of the progress on my phase change and my heatsink from hell!!