with this rig, not air cooled wr, to set a air cooled wr go to Antarctica in the middle of the night, i fans all u need.
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with this rig, not air cooled wr, to set a air cooled wr go to Antarctica in the middle of the night, i fans all u need.
:D
I achieved a 5383Mhz screenie, but it was corrupted :/
My current single stage is a bit screwed up, I can only get -2C idle @ 5Ghz / 1.7V, I'll fix it next week too :)
what cpu?
P4 670 on an Asus P5WD2
just got a validation from CpuZ at 5367 :
http://valid.x86-secret.com/show_oc?id=39543
:)
5404Mhz validated now : http://valid.x86-secret.com/show_oc?id=39553
I'll unmount my single stage, then wait for the X³ now :)
Anyone want to comment how ethylene holds load temps vs CO2 rather than just lowest temp???
-100C is -100C....can't believe he even said that.
Please, don't start a flame war here, we'll not fight for that kind of stupid things...
I hope I'll have my pzrs on next week, I want to bench, I've made a stock of good cpus, they're withing for xtreme coldness :D
why do chips run more stable under extreme cold?
I think heat has something to do with processors leaking current, or something along those lines.
I wrote an FAQ on this for antoher forum, enjoy. First post!Quote:
Originally Posted by the_new_guy
As most of you know colder temperature, especially extreme cold, is very beneficial for overclocking. I am now going to explain why this happens from a Material Science standpoint.
First Equation that you need to understand is Ohms Law.
1. Ohms Law states that: V=IR
Where V is voltage, I is amperage, and R is resistance. Higher voltage means more amperage or less resistance.
A step up from this equation is the resistiviy equation. Resistivity is a mechanical property, different than resistance. The relationship between resistivity and Resistance can be seen in equation 2. Resistivity is dependent on Temperature, resistance is not.
2. R = P L/A
In this equation P is going to be resistivity, R is resistance, L is length (such as length of a wire), and A is cross-sectional area (of a wire). We can see that as P (resistivity) increases The resistance will increase. A larger cross sectional area will also increase Resistance.
The final equation to tie this all together is the conditions effecting resistivity. There are 3 major things that will determine the resistivity of a material. They are temperature, impurities, and deformation.
3. P (total) = P (thermal vibration) + P (impurities) + P (deformation)
P(total) is the total resistivity, and the other P's are the factors of resistivity. This equation shows that the higher the temperature, the more thermal vibrations will occur, thus causing a higher resistivity. At extremely cold temperatures such as -100 C the thermal vibrations of the atoms will be much smaller then at room temp. These smaller vibrations translate into a loss of less kinetic energy. This means that effiecency is greatly improved at cold temps. You will get a higher overclock with less voltage at these extreme temps. The other two factors, impurites and deformation also play a role in resistivity. A high purity copper with a mirror finish will have a very low resistivity.
hey cool
thanks for info,
i had an idea that it had some thing to do with drop in Resistance
awesome pics man, i cant wait to see your ~-120C pics
nice idea to bump this thread :)
I'll post a ton of new pics today, including how to insulate a -100C evap without putting anything dirty on your motherboard :)
I may have my new third stage gas tomorrow, if that's the case, I'll keep the thread up to date
No cookie, but you'd probably be bashed for a fake (or get nobel prize) since its almost 80K below absolute zero.Quote:
Originally Posted by Tyrou
Beautiful cascade!:toast:
amazing work man. out of intrest where did you buy those liquid line filter dryers from?
Very nice temps! One hell of a setup. Good luck on the record breaking!:slobber:
:wave: tyrou :)
Beautiful cascade!:woot: :woot: :slobber:
@+:):D
:toast:
Weee : I study physics at the university, that was not serious :D
I bought my dryers at a local HVAC shop, two with 1/4" flare fittings and a 3/8" flare for the first stage.
A friend of mine will provide me with some methane today, I'll have that this afternoon, so I'll be able to charge my third stage with a better mix, maybe we'll see -120C tonight :slobber:
Pics will also come today :)
Wow, that system is huge, right up there with the "Mother of all Cascades". Nice work. Not sure why I didn't look at this thread before. Anyway, nice work, look forward to the results.
RussC
Quote:
Originally Posted by Tyrou
thanks RussC :toast:
From the date I posted this thread, I also replaced the first stage compressor (1HP), which was not strong enough to hold the load of the two lower stages, I now have a 1.5kW rotary compressor, making the whole cascade draw 3kW :D
I'm turning nuts waiting for methane, this morning, I already double checked how everything is working and prepared the setup for the new gas :D
:wasntme:Quote:
Originally Posted by Tyrou
1.5kW :woot:
What are you blending with methane? or going just methane?
Quote:
Originally Posted by Tyrou
Well I think that -100c should not be any problen whit that cascade. Nice job man. That is very clean job. :woot:
So much grettings deserve more pics :D
that's how it performs :
first stage, alone :
http://www.x3.tyrou.net/s1_-620.jpg
both first and second stage on :
http://www.x3.tyrou.net/s2_-971.jpg
third stage, without methane :
http://www.x3.tyrou.net/s3_-1091.jpg
I need to improve my second stage's capacity to use methane efficiently, for now, everything I got with it was higher discharge pressures and only a few degrees lower, that was not worth it.
I also made a few changes, now, my evaps are independants, each one has its own CPEV, so I can tunr on only the gpu evap, or the cpu evap, or both :slobber:
http://www.tyrou.net/x3/cascade-26.jpg
http://www.tyrou.net/x3/cascade-29.jpg
More pics will come in a few days, I'm too busy trying to get some good numbers in 3D05 :D
SWEET :slobber: :eek:
Specially 1st stage works GOOD :p:
Which comp do you have on which stage ?
Nice idea with those 2 CPEVs ...I have never seen that till now :)
Regards
Peter