[G4] Liquid Cooled new g5 2.5 ghz

[Keith Whaley]

Steven wrote:

> Bruce Pillman wrote:
> 
> 
>> We're really talking about three heat exchangers running at the same 
>> time. Two heat exchangers are from the chips to the fluid, the other 
>> is from the fluid to the air. I know that's stating the obvious, but 
>> the key is: how much temperature differential there is between the two 
>> processors depends (among other things) on the rate of the fluid flow. 
>> If they move the fluid really fast, then the two processors are at 
>> nearly the same temperature. If the fluid moves as slow as a lava 
>> lamp, then the 2nd processor toasts up :)
> 
> 
> It seems to me the fluid will always have a higher temperature when it 
> passes the second processor compared to when it passes the first. And 
> since it runs at the same speed at both processors I 'd say the second 
> processor gets less cooling. When the fluid moves faster the difference 
> indeed gets smaller. 

No proper mechanical/elec.mech. engineer would allow that to happen.
If the first processor had a flow restrictor of some sort there, and a 
larger bore for the 2nd processor, you could provide a longer flow 
resident time for processor #2, to pick up more heat.
Believe me, it is no problem.
Now, in practice... who knows?

keith whaley


That could indeed explain the design. Which makes
> me wonder, how is the flow established? Is there a pump of some kind?
> 
> Steven
> 
> 
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