AMD X2 4200+ OC'ed at 8.2Ghz with air cooling 8)

I did a funny thing to my computer. I'm running on windows 2000 having just put deskpooter back in her case. I wanted to see how hot she would run as I am not using a fan directly on the CPU heatsink

My Mobo is an MSI one which comes with a utility called core centre you can use for overclocking and monitioring temps I had that running. I opened up superPi to use to stress the processor.

I then opened up task manager to see if I could set superPi to run on one core which I couldn't. Instead I decided to set it to a higher priority. I thought I would really kick the beasts butt by setting SuperPi to run realtime.

Then I asked SuperPi to calculate Pi to 4 million digits and set it running. The CPU was instantly maxed out to 100%. I was watching task manager and core centre wanting to see the CPU usage and the temp.

Then the weirdest thing started happening. The CPU multiplier started lifting. I thought it was locked at 11 .. but .. no it went to 12 .... then 14 ..... then jumped pretty quickly to 37. My Frontside bus is running at 11% Oc'ed anyway which is 222Mhz so my CPU is running at 2.442Ghz over 2.20 stock and Im running the CPU at a little over voltage. But .. holy crap .....

Core Centre was telling me that my CPU was running at 8214 Mhz

So then I did the math ... 37 * 222 = 8214. WTF ??????

Temperature hit 42 degrees ... up 3 from the 39 she had settled at with her new cooling arrangements and I quickly dropped the thread priority for fear of seeing my CPU explode ... 8.214Ghz from a 4200+ I want an explanation .... multiplier 37 x ... I want another one lol

Anyone seen anything like this before??????

Clues?

CrazyB

Here's a video - I did it a second time for the naysayers out there. The multiplier "only" went to 36.5 x this time and the CPU speed 8.08 Ghz ... Temperature? a measly 44 degrees .. but I didn't leave it running like that for long nevertheless. Remember ... standard is 2.442 Mhz an 11% overclock on the FSB only. ( oh and the noises on the video are not the computer its the bad encoding lol)

DAMN!

Go post it over at XS and boast!

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Originally Posted by Scotty

DAMN!

Go post it over at XS and boast!

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Man did you watch the video???? lol

And wtf is XS??? heheheheheheh

CrazyB

XtremeSystems The sort of people that volt mod, crazy ass overclocks etc.

Yea i did watch the vid, damn crazy ****.

LOL :) defently an error :) but show this to avid overclockers and they will surely freak out! I mean, you know even the most extrems overclocks went to 5GHZ+, with liquid nitrogen.. so an air cooled passive system.. you should be allowed to make a gif out of the video and have it as your sig! oh, and have some +rep ;)

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Originally Posted by dgrmkrp

LOL :) defently an error :) but show this to avid overclockers and they will surely freak out! I mean, you know even the most extrems overclocks went to 5GHZ+, with liquid nitrogen.. so an air cooled passive system.. you should be allowed to make a gif out of the video and have it as your sig! oh, and have some +rep ;)

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Thats what I thought CPUZ isnt reporting the same but it does say my fsb jumps to 800+Mhz !!!!! which is the same thing lol

I have no clue. Sherlock "Google" Holmes will be on the case tomorrow ;)

PS it seems to have blown the lock on the multiplier. Whenever the PC needs a bit more its jumping to 12 or 13 hehehe

Wouldn't it be funny, if all the watercooling, peltiers, souped up superfans that we have been using...were acutally insulating the cpu more that cooling? And the most efficient way to cool the cpu was take everything off and blow on it once and a while...

lol. So CPUZ reports it as 8GHz too? Run SuperPi to 1 million see if you get some seriously crazy ass score.

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Originally Posted by Scotty

lol. So CPUZ reports it as 8GHz too? Run SuperPi to 1 million see if you get some seriously crazy ass score.

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Runing it to one million does not create the effect .. I was running it to 4 million in this case which my machine does in about 3 minutes 30 seconds.

What I am going to do is this:

1. Shut everything down except task manager, Core centre and SuperPi

2. run it to 4 million and record the time

3. Set the priority to Realtime

4. Run it to 4 million again and record the time + video it

This time I'm going to run it through to the end, assuming the temperatures do not get too high. If this experiment goes wrong I will have blown $140 and be back using my 3500+ single core. :D

Talking of which CPUZ reports my X2 as having one core. Known issue anyone?

CrazyB

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Originally Posted by jdbnsn

Wouldn't it be funny, if all the watercooling, peltiers, souped up superfans that we have been using...were acutally insulating the cpu more that cooling? And the most efficient way to cool the cpu was take everything off and blow on it once and a while...

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Yep ... you wait til you see the pics of how I am cooling the CPU ... the heatsink is HOOGE BUT .... I have NOT got a fan fixed to it. See the wood behind the heatsink: its the desk drawer side. There is now a hole in that and in the outside of the cabinet. Neatly slotted in between th etwo layers of wood there is a 92mm Zalman case fan blowing cold air from the room straight at the cooler but it is a good 10cm or 4" away. The airflow it creates is superb though and nicely limited by the PCI cards which are themselves cooled from the other side by a 120mm Noctua ultra low noise case fan.

Keep your eye on the temps just running superPi, temp monitoring program and task manager, don't want to risk destroying it.

I'm quite prepared to in the name of science. If it;s really running at anything like that it will calculate Pi to 4 million digits in about 54 seconds.

The mouse hates moving though lol

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Originally Posted by Scotty

Keep your eye on the temps just running superPi, temp monitoring program and task manager, don't want to risk destroying it.

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well... you will surely find the quirk somewhere! :) I myself couldn't go past 3GHz with my x2... so one day I may decide to take everything off, including the heat spreader from the chip and cool it with.. nothing ;) of course, first I gotta have a quad core backup >: )

Oh, noticed you still have stock cooling on the chipset.. What are you gonna do about that? Maybe that is limiting your OC ;)

Good luck and experiment some more, but be careful not to blow something :)

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Originally Posted by dgrmkrp

well... you will surely find the quirk somewhere! I myself couldn't go past 3GHz with my x2...

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X2 what 4200+ ??

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Originally Posted by dgrmkrp

Oh, noticed you still have stock cooling on the chipset.. What are you gonna do about that? Maybe that is limiting your OC ;)

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As described in this thread, I am planning this:

:p to be honest, I was reading your desk potter right now :D you beat me to it :) those 2 heat pipes should do a very good job. I am beginning to wonder if I should watercool my chipset.. I have a HR-05, good sink, but it has one heatpipe only.. and doe it job with no fan on it pretty well. So, I bet you are gonna stay cool and quiet with this.

Oh, about the x2.. I have the lowest model, the 3600+ EE or so-called dual core sempron.. I am pretty happy with it, I keep it at 2.6 or 2.7 to get most out of the ram, but it went up to 2.9+, almost 3... Of course, that is nowhere near the 8GHz mark ;)

Just as a curiosity, you should run 3dmark to see what score you get from the cpu. I mean, even tho this is something strange, maybe (0.00001%) you have actually forced the multiplier open.. and the board can't read it.. check to see if the performance growth is way higher than the 200 extra MHz would achieve.. 8GHz is impossible, but going over 3 isn't and on to 4 isn't :)

It's actually quite strange. Can you give a screen shot of the front of CPU-Z?
The fact it's running really strange indicates there is a problem somewhere.
Try running this: http://www.alcpu.com/CoreTemp/
That will give you true temps of the CPU (and also tell you the speed and what CPU you really have)

And 3:30 is a respectable time, but it can't beat 1:36 xD

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Originally Posted by crenn

It's actually quite strange. Can you give a screen shot of the front of CPU-Z?
The fact it's running really strange indicates there is a problem somewhere.
Try running this: http://www.alcpu.com/CoreTemp/
That will give you true temps of the CPU (and also tell you the speed and what CPU you really have)

And 3:30 is a respectable time, but it can't beat 1:36 xD

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Thanks for the tips Mr "Two Boxes" :up: :D

I'm down to 3.07 and I'm not really trying yet. Thats runningit all the way with the thread process set to realtime. It's weird. The multiplier goes up and down. I think I know what is happening. All other processes are slowed to a near stop. I think CoreCentre is misreporting during the calculating phases of the program when it is running loops and at that times it reports massive overclocks or ... as the memory controller is on the chip and it knows it doesn't need to address memory .. it lets rip ... more to come.

Well if it's doing that, then it's very silly. That calculation (which told me my laptop was running at 82GHz) can be affected by heavy load..... so it maybe a cause, but it should read it from the CPU/NB.

btw, thanks for the "Mr. Two Boxes" xD