Polycold Modded Autocascade Rev.3!

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05-07-2006, 10:13 AM
s7e9h3n

Quote:

Originally Posted by coolingbug

-120c is 100% overkill for a 7900gtx. You will max out the card VIA the mobo before you will becasue of heat. ;)

-30 to -50c will 100% max out the cards on current gen motherboards and no worries will be had about coldbugs or condensation which if I remember from your x1900 was such a big prob already at just -50c with the baker evap let alone 2x -120c ;).

GL

PS:love the unit CYRO :D

Isn't everything we do overkill anyways? :D .....
05-07-2006, 03:52 PM
n00b 0f l337

Does the polycold have an expansion tank?
05-07-2006, 03:53 PM
n00b 0f l337

Quote:

Quote:

Originally Posted by n00b 0f l337
Ha you could do a smaller 2stage autocascade tube with a 1/5hp compressor. Its just your not going to have the capacity for a large load.

Think again ........

A 1/5hp compressor can't move as much as a 1hp compressor, thats just plain numbers.
05-07-2006, 04:30 PM
s7e9h3n

Quote:

Originally Posted by n00b 0f l337

A 1/5hp compressor can't move as much as a 1hp compressor, thats just plain numbers.

Thanks for the info :wth: But I never said it could ;) Just sit tight and wait.......
05-07-2006, 04:31 PM
s7e9h3n

Quote:

Originally Posted by n00b 0f l337

Does the polycold have an expansion tank?

Yes
05-07-2006, 04:34 PM
n00b 0f l337

s7' I know of the same diagram I bleeive for the 1/5hp compresor as you do.
05-07-2006, 04:37 PM
s7e9h3n

Quote:

Originally Posted by n00b 0f l337

s7' I know of the same diagram I bleeive for the 1/5hp compresor as you do.

I'm not talking about a diagram ;)
05-07-2006, 04:55 PM
n00b 0f l337

O RLY?
*someone post the image*
05-08-2006, 11:44 AM
s7e9h3n

Here's a little update: Cryotek has the unit fired up and testing currently @ -115C NO ARGON. We'll be playing with the argon charge as necessitated (is that even a word?:p: ) by the loads on the heads. The unit should be up in full swing by tomorrow :woot:
05-08-2006, 12:54 PM
runmc

Quote:

Originally Posted by s7e9h3n

Thanks for the vote of confidence ;) It's taken quite a lot of convincing to bring the senior members' opinions of cryo-tek around. :toast: But even that estimate may be a bit far fetched as the soleniods are ~1/4A heat load themselves. We'll have to see what happens once the unit is mounted and abused :p:

Don't put me in that group Steven I"ve always welcomed him and his brain :clap:
05-08-2006, 01:01 PM
eBoy0

Hope you find a way to mount those heads :eek: 2nd card clocks like a beast.:banana:
Here's max 3d it will do on stock air/voltage..
http://img463.imageshack.us/img463/6...09604zr.th.jpg
Here's max it'll run 3d w/o artifacts but starts to throttle at dragon.
http://img522.imageshack.us/img522/5...09700xm.th.jpg
Heading out to PO now. :D
05-08-2006, 02:20 PM
cryo-tek

1 Attachment(s)

First test run.
No argon in the charge.
Load on one head (I only have 1 test cell built. I need another heater.)
Two heads cooling

Load Inlet head out
0 w -112c -112c -112c 12/135
50 w -110c -110c -110c 15/140
100 w -107c -107c -107c 18/150
150 w -103c -103c -103c 20/170
200 w - 92c - 81c - 92c 23/185

I think I’m reaching the limits of the cold head.

I’m shutting it down and adding some argon.

Here’s my test rig:
05-08-2006, 02:24 PM
Revv23

nice, hows it made?
05-08-2006, 02:26 PM
ozzimark

the head doesn't seem to like 200w :(

nice temps at 150w though :woot:
05-08-2006, 02:58 PM
cryo-tek

1 Attachment(s)

Quote:

Originally Posted by Revv23

nice, hows it made?

It’s a 2” x 2” x ¼” copper plate with a ½” tube brazed to the backside. Big fillets. The ½” tube was then split and the heater (3/8” od) slipped inside. The ½” tube was pinched and formed around the heater for good heat transfer. The 2” x 2” x ¼” copper plate was surfaced after brazing.

Here it is attached::D
05-08-2006, 04:17 PM
cryo-tek

Second test run.
Two heads cooling.
Load cell on one head.
Added 10 psi argon.
Load Inlet head out
0 w -128c -128c -128c 18/155
50 w -121c -117c -117c 20/170
100 w -117c -112c -110c 20/180
150 w -113c -107c -107c 20/195

Looks like a captube adjustment and a slight change in the blend are in order . Not bad for a first try. :banana:
05-08-2006, 04:21 PM
s7e9h3n

Quote:

Originally Posted by runmc

Don't put me in that group Steven I"ve always welcomed him and his brain :clap:

Never did include you in that group Ron :toast: . Hey, I don't have any problems with the others' opinions. Everyone's entitled to their own. I just wanted Cryo-tek to get as fair a shot as anyone else here on these forums. I've got a video as well :D If anyone can host a 25meg file of the pulldown of the unit, I'll be happy to upload it.
05-08-2006, 04:24 PM
s7e9h3n

Quote:

Originally Posted by ozzimark

the head doesn't seem to like 200w :(

nice temps at 150w though :woot:

Show me a true 150W heatload ;) IIRC, a FX60 @ 1.65 loaded will give ~150-160W true heatload. For comparison, these new Intel Yonahs output ~30-50W MAX loaded ;)
05-08-2006, 05:04 PM
Revv23

nice 10c drop with argon

thanks for the details on the heatload
05-08-2006, 05:34 PM
ozzimark

Quote:

Originally Posted by s7e9h3n

Show me a true 150W heatload ;) IIRC, a FX60 @ 1.65 loaded will give ~150-160W true heatload. For comparison, these new Intel Yonahs output ~30-50W MAX loaded ;)

never know when you want to mess with a smithfield :wth:
05-08-2006, 05:53 PM
s7e9h3n

Quote:

Originally Posted by ozzimark

never know when you want to mess with a smithfield :wth:

I've got a p4 650 here for some testing :D BTW...I don't think you'll ever see me with a Smithfield :P
05-08-2006, 06:17 PM
mtl_hed

Quote:

Originally Posted by s7e9h3n

:D If anyone can host a 25meg file of the pulldown of the unit, I'll be happy to upload it.

Someone get this guy hosting space. quick.

Nice temps guys. Keep up the good work.
05-08-2006, 06:25 PM
[XC] Lead Head

Quote:

Originally Posted by s7e9h3n

Never did include you in that group Ron :toast: . Hey, I don't have any problems with the others' opinions. Everyone's entitled to their own. I just wanted Cryo-tek to get as fair a shot as anyone else here on these forums. I've got a video as well :D If anyone can host a 25meg file of the pulldown of the unit, I'll be happy to upload it.

I can host the file for a little bit, but not to long though
05-08-2006, 07:43 PM
jinu117

Good stuff... as long as you can start feeling cold forming from bottom side and not from side on your load tester (well... bottom just because when you mount the thing, it squeezes the insulation somewhat... which lowers insulating property)... ... I might be bit off in this since I am not used to -100c lol... the load is going to be similar if not same as what I play with. And stephen's estimate of fx-60 around the voltage is pretty accurate. I had one that would 150w at that volt while another one that does only 130w...
05-08-2006, 09:19 PM
cold_ice

Quote:

Originally Posted by s7e9h3n

Never did include you in that group Ron :toast: . Hey, I don't have any problems with the others' opinions. Everyone's entitled to their own. I just wanted Cryo-tek to get as fair a shot as anyone else here on these forums. I've got a video as well :D If anyone can host a 25meg file of the pulldown of the unit, I'll be happy to upload it.

I can host it for you. Drop me a PM...

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