Cascademodding the Prommy 4353 Mhz

[Tom Holck]

Modding the Prometeia with R404 have been known for some time. The secret is the length of the kapillær tube

1.5 meter
(now you don't have to experiment any more Bowman, you can finich Oppainters Prommy)


And now some EXtreme Prommy modding:

Put some extra R404 on the Prommy, and some R132a (better start). Now the Prommy almost are going to explode, the biggest fan can't hold the temp down. Now put an old Vapochill on as cascade... At full load P4 at 1.85 volt the Vapochill temp is +14 degree.. At desktop the Vapochill drop to -17 degree.

Konklusion:
When you have ice on your kapillaertube, you have serius cooling

[Tom Holck]

The nature of the CPU after the mod is close to LN2-cooling. low temp and high volt on the P4. But you can bench and have a stabil oc. At full load for 10 minuts the Vapochilltemp rise from -17 degree to +14 degree, but the CPU remain stabil, and the Vapochill work the temp down again.


Se the Pifastresult:

http://www.xtremesystems.org/forums/...4&goto=newpost

[DaGooch]

Very nice results and congratulations on a fully functional and successful cascade system.

[ctgilles]

s-i-c-k

[La1kr0diZ]

NUTZ!
Really a good idea!

[Juggernout]

AWESOME !

[NyCUndaGrounD]

Wow great Job, can it go any higher?

[ALT-F13]

Tom, can you try to run your CPU on default voltage (1.55V i suppose) and check max clocks? Maybe not with this insane cooling though.

I'm asking 'cos my ES 3.2 works fine on 3.75G on default voltage on air (3.8G stable with waterchiller, +17C on chip) and no problems POSTing on 4.1G with that voltage... If i add any more it just get hotter and o/c worse (POST on 4.0, works on 3.7G even if it _actually_ on the same +17C). I'm waiting for Vapo now, but just trying to understand, WHY increasing voltage doesn't help me.

BTW when we'll see your 3dmark results with this monster?

[Method Man]

Awsome!!!

What are the cpu's temps by the way?

[Tom Holck]

Originally posted by Method Man
Awsome!!!

What are the cpu's temps by the way?

Hi MM

The prommy display goes to to -53 and then it beebs.
I turn it of, and the display shows error code 0

The Bios and monitoring in windows shows -23 and then N/A

[Tom Holck]

Originally posted by NyCUndaGrounD
Wow great Job, can it go any higher?

A bit unstable over 4400

[Tom Holck]

Originally posted by MickeyMouse
cascade meaning one phasechange cooling another? sorry for the newb question as Im just now into vapo myself.

Yes, you can read more about it in the vapor phase change sektion:

http://www.xtremesystems.org/forums/...?s=&forumid=80

[]JR[]

Where did you put the vapochills head on the prommy system? Theres no way that the vapo on its own would condense the r404. Is it just subcooling the capillary tube?

]JR[

[Tom Holck]

Originally posted by ]JR[
Where did you put the vapochills head on the prommy system? Theres no way that the vapo on its own would condense the r404. Is it just subcooling the capillary tube?

]JR[

I put it after the radiator. The aircooling with big fan take some heat. The out pipe from the radiator is the right spot for cascade.
I made a cobberblock cut it in to, and mount it around the pipe.
On that cobberblock the Vapochill is mounted..

When you make cascade cooling, that is the way to do it. When done right the tube gets so cold, that you have to isolate the kapillaertube!

notis the long roll of capillaertube behind.

[Holst]

LOL Tom thats nuts.

Well done getting it to work

Id also like to see a close pic of the vapo on the cap tube.

[bowman1964]

good going tom.

but this isnt cascade .....sounds cool but all you did is give is subcooling so the refirgerant wont flash over when it reaches the evaperator.

i did the same thing but with one system.you cannt get close to ln2 cooling like this my friend.

a true cascade will use the cooling power of one to allow you condense a extremely high pressure refrigerant.such as r503 ,co2,and so on.

i doubt if anyone will see the temps OPP will be seeing for a while,(unless ups drops the ball and damages it)

but this is a cool mod,my friend.

great going

[saaya]

so youll use a diferent coolant bowman? i can only recomend you guys to use water to cool the radaiator. i did that on the vapochill of a friend a long time ago and it made hs temps drop like 20°C. you only need a 50x30cm radiator to cool the water then

[bowman1964]

Originally posted by saaya
so youll use a diferent coolant bowman? i can only recomend you guys to use water to cool the radaiator. i did that on the vapochill of a friend a long time ago and it made hs temps drop like 20°C. you only need a 50x30cm radiator to cool the water then

no the prometia cant handle anything stronger than 404.

compressor is too small for any higher pressure refidgerant

[Gary Lloyd]

Is this a true cascade? Maybe.

If the refrigerant is condensing in the condenser and the vapo is reducing the temperature of the liquid, then it is a subcooler, not a cascade.

If the refrigerant is de-superheating in the condenser and the vapo is condensing the refrigerant, then it is a cascade.

Similar results could be achieved by putting an equivalent sized pelt where the vapo is. Again it is a subcooler or a cascade depending on whether it is subcooling or condensing refrigerant.

Either way, it is an excellent mod. Congrats.

[QuadDamage]

damn bowman, you certainly know the phase change stuff, my man

[saaya]

if the prommies compressor cant handlöe higher pressures how are you building a better one for opp? a diferent compressor?

[LORD]

Originally posted by bowman1964
good going tom.

but this isnt cascade .....sounds cool but all you did is give is subcooling so the refirgerant wont flash over when it reaches the evaperator.

i did the same thing but with one system.you cannt get close to ln2 cooling like this my friend.

a true cascade will use the cooling power of one to allow you condense a extremely high pressure refrigerant.such as r503 ,co2,and so on.

i doubt if anyone will see the temps OPP will be seeing for a while,(unless ups drops the ball and damages it)

but this is a cool mod,my friend.

great going

But if it hit's -53.9 on the evaporator as set by chip-con then it will shut down the system. Or did you overcome this phenomenon?
Would be good if it can be circumvented with some sort of recalibration so as not to ERROR and beep.

[charlie]

Even -55C is a looooonnngggggg way from -196C
Not even CLOSE to LN2.
But, very cool mod.
C

[saaya]

i think you dont see a big dif in ocs with a -100°C cpu and a -200°C cpu... aynthing lower than -100°C would be a waste...

[Amoeba Assassin]

very nice

*tips hat*