When you open the service port, fluids come out and any pressure in the system (which is unlikely) will be released. Then draining should be simple. I had disassembed the processers from the heatsink, so there wasn't much fear of the fluids in any case.
I am in the office just now, where the room temperature must be pushing 30ºC from the central heating being on (I can't control it), whereas the ambient temperature in my basement yesterday was probably around 20ºC. The idle CPU temperatures here today have been about the same as they were before I did the service, truth be told, at 43-45ºC, depending on what I have been doing. Stressing the processors brings the temperatures up to the mid-60s Celsius.
The difference between now and before, however, lies in how hard the fans and pump have to work to cool the machine. When you think about it, that is how the thing is meant to work.
At idle, the pump used to be running at about 2500rpm and the fans at about 1800rpm. That, of course, went up as the machine got use, even just from a browser on the web. So I just did some testing and grabbed a couple of screenshots of the machine right now in its working environment.
The first is the machine at idle after normal use for an hour or so:
Stressed.jpg[/attachment]
As can be seen, even under stress the fans and the pump are still nearly at their minimum rpm rates. Very quiet. I like.
Now, if you were to stress the processors for hours, the coolant would obviously itself heat up and the system would have to work much harder to extract the heat from the processors. The second image above represents what happens after only about 3-4 minutes of stressing. But then, I scarcely ever max out this or any machine, so this represents my working environment.
I am in the office just now, where the room temperature must be pushing 30ºC from the central heating being on (I can't control it), whereas the ambient temperature in my basement yesterday was probably around 20ºC. The idle CPU temperatures here today have been about the same as they were before I did the service, truth be told, at 43-45ºC, depending on what I have been doing. Stressing the processors brings the temperatures up to the mid-60s Celsius.
The difference between now and before, however, lies in how hard the fans and pump have to work to cool the machine. When you think about it, that is how the thing is meant to work.
At idle, the pump used to be running at about 2500rpm and the fans at about 1800rpm. That, of course, went up as the machine got use, even just from a browser on the web. So I just did some testing and grabbed a couple of screenshots of the machine right now in its working environment.
The first is the machine at idle after normal use for an hour or so:
Stressed.jpg[/attachment]
As can be seen, even under stress the fans and the pump are still nearly at their minimum rpm rates. Very quiet. I like.
Now, if you were to stress the processors for hours, the coolant would obviously itself heat up and the system would have to work much harder to extract the heat from the processors. The second image above represents what happens after only about 3-4 minutes of stressing. But then, I scarcely ever max out this or any machine, so this represents my working environment.