Mach2GT mod (quad core)

[Clemmaster]

Hi, I've been asked to mod a Mach2GT sometimes ago. I won't write all the thread again (even more in english :D ), just show you some pics I'll make within I sent it back to Bingo le Bino.

First, I'd like to give you my point of view about the stock systems : there isn't R404a enough! After 10mn It goes down to -50° with the frost stopping 10cm before the succion connector (without any load off course)! They should fill a bit more R404a if they want it to be able to carry any load...

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/System4.JPG

The project consist of the addition of a second condenser (ND50F), and a new evaporating kit (made by piotre :) ). I've used 12mm pipe for the succion line because 8mm isn't big enough to have a sufficient margin with the quadcore. There's sth like 2m30 captube (0.8mm), wich is more than long enough ;)

Here are some pics of the job I did yesterday (that's still dirty, I haven't cleaned anything) :

The condensers:

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/condenseurs1.JPG

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/condenseurs2.JPG

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/condenseurs3.JPG

The evap kit :

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/evapo1.JPG

The succion line accumulator that stood just after the little flex on the mach2GT.

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/SLA.JPG

The system :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/system7.JPG

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/system8.JPG

http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/system6.JPG

Running :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/running1.JPG


http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/running2.JPG


I've won 7° between R290 and R507c in vaccum (-53° --> -60°), temperature decrease faster than it did before (-50° after >7mn , -60° before 4mn now). Of course there's more R507c now and I've got -52° but there's too much liquid return so I had to turn off the system (<-53°). I'll fill it properly with a C2D in the next few days I hope :p:

[teyber]

wow! thats sick! cant wait to see it all cleaned up!

[tiborrr]

Very good job there! Quadcore load action wanted :P

[piotres]

It's looking very nice Clem :up: .

But ...where is fan on condensors ? I think 200+W loads need quite high flow 120mm fan :yepp: .

Regards
Peter

[Clemmaster]

The mach2GT has a lian li kit, so there is space between the front pannel and the steel case, I'll put the fan between them (you can see the fan on the pics where I show the temperature, it isn't fixed yet but will be when i'll have made tests :p


Btw I've mounted it yesterday, I've got only -20° on the CPU and the evap is still under -50° with a serious floodback (even at 4ghz - 1.65v), I have mounted it 5 times, the motherboard bends when I screw the nuts so I'll do the entire mounting today after school.

I don't know if the motherboard probe shows the true temperature, speedfan give me the same but doesn't give me the core temps (locked to 5° even when I turn off the mach2 :confused: )

[CometMan]

how that looks like mine, very alike

i have it running cool, the qx6700 at 4.3ghz 24/7 :)

no problem at all :)

http://img340.imageshack.us/img340/8396/43ghzcu9.jpg (http://imageshack.us)

good work on that prommy

[teyber]

@ what temps there?

sorry edit: i have a small monitor: and didn't see the right side of you screen with temps.

nice!

[CometMan]

the evaporator doesn`t go below -48 not even when i give 1.8v to the cpu, the dual rad on the front works like a charm :)

[CometMan]

fortog to mention

http://img390.imageshack.us/img390/2285/realtemphd5.jpg

http://img47.imageshack.us/img47/8295/mach2gtprobeln1.jpg

http://img58.imageshack.us/img58/8618/11mx6.jpg

[Clemmaster]

Nice job there :D

I've made some test yesterday with a new mouting --> I get the same results, only -18° on CPU (P5N-E SLI probe) it goes down to -14 with superpi 32mo but It was very hot yesterday (the HP was around 18 bar xD, it was only 13 the day before) and the evap goes from -48 to -45° so I don't know where the problem is :

Speedfan doesn't show me anything about core temps (always 5° until the global CPU temp is 15°). The evap seem to be normal, I've tried without thermal greass --> 2° in the bios ...

Any solutions? The mounting is good, I've tested with and without insulation that's the same.

[Clemmaster]

Ok I've place a thermocouple into the socket, to know the CPU's temp. The problem was the prob of the P5N-E SLI that didn't show the true temps under 0°. I'm @ -45° (CPU temp, evap is -49°) with 1.65vcore @ 3ghz (Core2Duo). The liquid return stops 2mm before the compressor and ice is forming vey well. I've test SPI 32mo, I loose 2° (CPU temp) and only 8mm frost on the succion during all the test, so It can't do a better job for a quad core :D

I'll update some pics soon....

[sacha35]

Nice job there clemmaster, would it be possible to show the load range that this unit can Handel and the temps for these given load settings I.E 150 watts up-to 250-270 watts ((quad core) ?

[kayl]

nice job on fitting the condenser in front of the other one :D

[Clemmaster]

It would have been better to switch the condensor because the mach2GT one is very restrictiv, the airflow isn't strong (the fan runs @ only 30% because of the thermal probe that isn't placed yet :p)

I've filled it for quadcore so I don't expect to go @ very low temperatures with C2D. Here are some pics:

The prob near the CPU :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/TC.jpg

The set up :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/install.jpg

Evapo @ IDLE :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/evap_idle.jpg

CPU @ IDLE :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/CPU_idle.jpg

Liquide return @ IDLE :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/RC_idle.jpg

After 15-20mn :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/accu.jpg

CPU temp under SPI 32mo :
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/CPU_Pi32mo.jpg

Evap temp @ 130-140w (E4300 @ >1.7v - 3.15ghz):
http://clemmaster.free.fr/DoD/Mod%20Mach2GT/Bingo%20le%20Bino/evap_180w.jpg

It's very hot In my room (~30° ambiant), the discharge pressure is over 17bar because of the fan running slow, I think it can achieve -43° CPU temp (-48° evap) easily with the case and a 25° ambiant temperature.

[sacha35]

looking good But what are the temps going to be under full load running a quad core at 250 270 watts, yes it is holding good temps at 130-140w but you stated that this unit is for quad core so some results would be nice to see running it under quad core at the load stated above loads.

[bulledeaux]

beau travail :up:
il reste plus qu'a le tester avec un QX6700:lol: