PII 940 OC Log

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.



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.





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.



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.



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

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.

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.





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.



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!

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.

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



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

why is your score so low

what preset are you running?

i have the same motherboard as you i'm at 1.424 volts

with a oc of 3.6ghz on my p2 x940 i got 15762 vantage score

and a gtx275 oced to 735..

here is my score http://service.futuremark.com/compare?3dmv=1191222


EDIT: oh your using a 4870x2

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.

try a run of a 1m calculation on superpi

im interested about ur score.

Glad to see you back Overshocked.

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

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

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

That looks like a car radiator!!!!!! lmao!!!

How you gonna hide that? lol?

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!

You should fill the tubes 1/4 full with methanol or ethanol, so as it boils and evaporates it flows to the top, giving better heat transfer and temps.

Agreed........ That thing is nuts.

I don't know what the problem is, but AOD shows -237C on mine too...maybe it's because the cores are unlocked...I haven't really tried other temp utilities other than the one from my motherboard disk

Yeah, id really like to get started working on it but the problem is...

where do i get big hollow copper blocks like that???


I might just end up using a series of copper endcaps that fit in side of eachother... But the problem with that is that i wont have enough room to mount 20 heatpipes!?!?

Any suggestions to use for the block?

BAGH... i hate water cooling.

Ive only used the LCLC to cool it but i havnt done a full loop like alot of people do.

Why would i when a decent setup would cost me as much as a phase change??

Yea you got a point there.....

I hope i can hit over 5.1 so i can beat the reccord for air cooling!

Thx for the good luck, ill need it

Yeah, so far the phase change that im building has cost me about $315

And that is about how much a nice watercooling setup costs

Dude, i will weld it... i dont nead reducers

What part of it were you reffering to anyway?

In your early post you were talking of sliding one pipe inside another. Welding will work, but you will need to pressure check it.

KICK ASS RIGS man

I would go for phase change to cool that (=

Here is some pics of the phase change that im building






A pic of the compressor and the schrader valve



The top shrader valve...



Bottom of the system