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P4 2.80GHz Overclocked to 3.917GHz
vwbus writes "The guys at Muropaketti have taken a brand new Pentium 4 2.80GHz chip, bought a pint or so of liquid nitrogen and overclocked it to an astounding 3.917GHz. The Finns describe how they put together the system on their web page, and luckily there are a whole set of pictures which demonstrate exactly what they've done, so you don't need to understand Finnish to figure it out. The pictures show wisps of nitrogen evaporating from the jar sitting on top of the CPU, and they publish some SiSoft figures to demonstrate the kind of speeds they attained."
The folks at Muropaketti have had a lot of practice with this cooling method.
This Slashdot article is a blatant rip off from The Inquirer
On k5 I saw someone mention how you can tell the deterioation of a message board by how many goatse links there are.
/. we have gone one step further and started to mod them up to +2 :)
Here at
We have entered a new realm, unexplored by other message boards...
Just joking - please don't flame me
Prosessori ei kestänyt todella alhaisia lämpötiloja. Testit alkoivat rullaamaan huomattavasti paremmin, kun kulho ei ollutkaan aivan umpijäässä.
"The processor didn't handle really low temperatures. The tests ran significantly better when the bowl wasn't completely frozen."
So, now you know why we can't keep the processor outside - it would get too cold!
NB. Daily temperature maximums for Helsinki the last few weeks have rarely dipped below 25 C. Not that you would care, though. :)
The pictures show wisps of nitrogen evaporating from the jar sitting on top of the CPU
You can't see the evaporating nitrogen. The wisps are droplets of water condensed from water vapor in the air by the low temperature.
Stop worrying about the risks of nuclear power and start worrying about the risks of not using nuclear power.
Pentiums went to 233 MMX in Desktops and 300MHZ (MMX) in laptops:
.35 4.5 mil Socket 7 - 2.8 SPEC 8.4 / 5.7 .25 4.5 mil MMO
P5 233 66 32KB -16K I -16K D off chip
P5 300 66 32KB -16K I -16K D off chip
MMX P5 had fabulous battery life.
As far as the fastest 486, I believe the final 486 core was named 5x86 by AMD. It was available at 133MHz. It went into a socket 2 or socket 3. It typically was able to beat the Pentium 75.
I have never seen a 486 (not 5x86) DX4 faster than AMD DX4-120. So I dont know where this 150 came from.
Hello, That's correct. I was able to run the last test with 3998MHz CPU clock Here is the original size screenshot: http://www.muropaketti.com/bench/nw2800/superpi_39 .gif
http://www.muropaketti.com/artikkelit/cpu/nw2800/l n2_5.jpg
keanmarine.com
We have modified TurboPLL-module on Asus P4T533-C motherboard which allows us to use higher front side bus.
Thanks to this module, when we set 145MHz from BIOS, the FSB is actually 186MHz.
You can check out the pictures of modified motherboard here.
By the way, no one has made mention of the price of such a setup. OK they had 15 minutes of excitment for the price of a _really_ expensive CPU, custom motherboard, not to mention the nitrogen-cooling gear, the voltmeters and other lab equipment they use.
For the moment I'll stick to that 1.5Ghz processor which barely produces any heat & is so damn quiet:)
CPU still works fine and actually we are already planning for the next test with liquid nitrogen
Earlier we tested Pentium 4 2,4GHz CPU with liquid nitrogen over 20 times and it's still kicking
We dry the components very carefully after the test with compressor.
Actually you can dip your fingers/hand in LN2 without hurting yourself. I used to do it every time to amuse/bemuse visitors who came to our laboratory. Just make sure you're not wearing a ring or other jewellery.
The owls are not what they seem
So, excuse me for yelling, but:
YOU SHOULD NOT TREAT LIQUID NITROGEN AS A TOY. YOU CAN CAUSE SERIOUS HARM TO YOUR BODY.
I'm speaking from the hindsight of a lawsuit from Johny can't count to 21 with out taking off his pants. (Check out my web site listed in the URL.)
III.IIVIVIXIIVIVIIIVVIIIIXVIIIXIIIIIIIIVIIIIVVIII
I know where you can get Liquid Nitrogen, it's incredibly easy to do. But a word of note to those who may want to keep their electronic systems working longer then the test time.
Unless you live in the sahara desert or another place that has incredibly low humidity. This is incredibly dangerous to the motherboard. Those whisps that you see coming from the Liquid Nitrogen is not Nitrogen vapor. It is water!! Nitrogen vapor is not visible. The fact of the matter is, that the air around us has a lot of water in it, and when you start to cool it suddenly to -160 and below, you create a lot of water vapor. Now doing this with a computer will likely leave a nice little pool of water on the motherboard when you are finished. So unless you are willing to take that risk. I do not recommend doing this.
There is even a pic there where it should the frozen water buildup on the outside of the containing device they built. Can you imagine what the motherboard would've looked like after a while of this?
Having working with Liquid Nitrogen, and knowing how dangerous it can be even without electronics. I don't recommend this as a friendly try with buddies experiment.
~ kjrose
I did a quick translation from Finnish of the Muropaketti article:
There are probably more than enough articles about the Intel Pentium 4 2.8 GHz, so standing out from the crowd with some LN2 overclocking tests is a good thing.
For the tests, we ordered 10 litres of liquid nitrogen from Porin Hitsauslaite Oy and Messer (well known for [his|its] good service) supplied a 20 litre tank at the same price.
As a test bed, an Asus P4T533-C with an i850E chipset (which had been found to be satisfactory) was used. Samsung PC800 RDRAM modules were used for memory. The motherboard had TurboPLL, Vcore and Vmem modifications, which are better documented here.
This was the first LN2 test with this processor, so we started off by trying to get a feel for how the CPU behaves at low temperatures and what sort of results to expect in the future. For this reason a PNY GeForce 4 MX 440 display adapter was used, which has been found to tolerate very high bus speeds. Later, we'll do some ATI Radeon 9700 Pro tests and try for a new 3DMark2001 record.
Below a series of pictures describing the events and some general pictures of the [assembly|system].
[lots of pictures]
The tests didn't start easy, even though the system did agree to start Windows XP at 3913MHz. The Pifast test didn't complete at all. After testing for a hour we started to get a grip on the situation. The CPU didn't tolerate really low temperatures. The tests started running noticeably better, when the bowl wasn't frozen solid.
[more pictures]
At the end of the first day of testing, I managed to run the Pifast test at 3917 MHz and reach a new record of 24.17 seconds.
Finally, I managed to complete the Superpi test at 3998 MHz at 39 seconds, which is the current record on the Superpi ranking list maintained by [the|some] Japanese.
I also ran the SiSoft Sandra CPU and Memory benchmark tests at 3920MHz (21 x 186MHz). The results speak for themselves.
Sandra's CPU tests says the bus speed is 145 MHz, because a TurboPLL coupling was used on the motherboard. A 18.43 MHz crystal was used, from which the correct bus speed can be derived:
(18,43MHz / 14,3MHz) * 145MHz = 186,55MHz
Finally, we checked how high we could go and still get the CPU to wake up.
[POST picture]
The system managed to POST at 4339 MHz with a bus speed of 206 MHz. Let's hope we break the magical 4 GHz boundary in our next test. In other words, there's more to come...
And nothing really happend... he was throwing it everywhere and for the most part it just evaporated before it could really do anything. A human won't even feel a few drops of liquid nitrogen if it were to start falling on him.
Liquid Nitrogen is very cold but it cannot survive in the extreme heat of room temperature. When the Liquid nitrogen was on the surface of our lab tables it acted like water on a top of a 600 degrees frying pan. It danced wildly then evaporated. A cup of nitrogen should be no problem unless one of these guys dipped their hands in it.
Hmmm... Pie...