Hi
Some mounths ago, Symphy, nice memeber of XS.org forum ask me about build unit to cool His incoming, serious hardware (Conroe X6800ES + 2* high end CrossFire config) . So we have decided on 3-evaporators system - with 2 rotaries.
One rotary = one CPU evap controlled with CPEV, second rotary = 2* GPU evaps, controlled with 2*CPEVs.
One condensor, 3.0 kW [!]with 34W fan.
Oilseparator for CPU loop.
There were many complications, eg. case was cutted 2 times - first was too small for further rotary (first plan was two 9k BTU rotaries), first that had been 1.9 kW condensor.
Symphy really want monsterous rotary for CPU loop, first I've bought Matsu 28000 BTU [!] rotary which didn't work, finally I've found even better (= stronger) compressor for CPU loop -8.3kW, around 2.5 HP [!]
SIAM NN33VAAMT.
Final specs :
Compressors: SIAM NN33VAAMT for CPU loop (2.5 HP), and LG QB134PE12A for GPUs loop (3/4 HP)
evaps : piotres's custom
Expansion valves: 3*CPEV Fach "PZ" (each evap controlled with CPEV)
condenser:3.0 kW with 34W fan
Refrigerant : R507 & R410a blend for CPU and GPU loops
Case : Chipboard case with wheels, painted red
others: REFCO 4*panel gauge, ShineYear oilseparator with float for CPU loop, homemade receiver for GPU loop, sight glass for GPU loop, one EBM 30W fan on the back wall
Let's allow to talk pictures - full story of build.
First plan : ordinary 9000 BTU rotaries + 1.9kW condensor.
First case ...
Very nice REFCO panel gauges.
Evaporators and suction lines.
And now we have started to go crazy...new 3.0 kW condensor with 34W fan.
Is it happy ?![]()
![]()
Homemade receiver for GPU loop (before 2 CPEVs) .
28000 BTU Matsu and oilseparator appeared..that time it's stared to go XTREME
.
More and more pipes.
Just after that, I've put some R507 into CPU loop, and I saw that Matsu don't want to start ...seems like it's broken![]()
![]()
.
Now quite long time with no work, new rotary searching and .....
SIAM already mounted, temperature on 215W heatload, uncompleted insulation .
Some frost on GPU loop![]()
Completed, case screwed, ready to some tests.
TESTS in 20*C room:
SLI/CF evaps went into vaccum.
CPU evap went into vaccum![]()
.
SLI/CF evaps loaded with 115 W each (2* 115W ).
IT'S DEVIL![]()
![]()
.
215W heatload on CPU evaporator = -66.6*C - Guys, is that a WR in Single-stage temperature ?
even -67.7*C with 215W![]()
All pressures in load (215W for CPU, 330W for GPU loop).
Some tests on ancient Barton 2500+ mobile ...+3.05 ghz/2.1v idle around -74-77*C, stress -71-74*C.
Ready to go .
Stefan told me : " - 70.1*C at the evap during 3D Mark 06 CPU Test with retail E6700 and 1,76 Volts . " And that was only first play with unit, I think CPEV can be tunned bit better even. Soon he'll put X6800 + 2*X1950XTX under evaps
. I hope he'll write sth more here
.
Regards
Peter
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