Well, this new computer has pretty much been the upgrade from hell. First the specs:
Antec P180 black
Athlon 64x2 4800+
Asus A8N SLI deluxe
1 gig OCZ gold RAM
pair of 6800GT in SLI
pair of 74Gb Raptor in RAID 0
Plextor DVD writer
Seasonic 600W S12
I wanted to watercool this system to try to get it quiet. I saw the Koolance Aquian, and thought that was a neat idea. Unfortunately, it doesn't fit the case and allow using the topmost PICe slot at the same time. So I tried taking apart the Aquian to see if I can fit the components separately. For such a large case, there is a surprising lack of space inside. No go, so I ended up ordering the Reserator 1Plus. I was curious to see if it could cool the CPU, 2 video cards, and a northbridge.
Well, it can't quite do it. Idle temps are fine, CPU ~36C, video cards around 50C at idle. "System" temp is constant at 44C. This is with an external pump (Eheim 1046, which I purchased a while ago in an attempt to watercool my HTPC). With the stock pump, forget it.
However, when playing games (Far Cry) for about an hour, CPU rose to 70C, but video cards hovered around 60-65C. The CPU block was almost too hot to touch. The water was warm. The tower was warm. So I don't think it really has the capacity to cool a really high-end system. But boy is it quiet. Even with the external pump, it is silent. The only noise comes from my case fans (3, but I will remove 1 or 2) and the hard drive seeking noise.
One thing I did was to split the water tubing so the CPU and northbridge gets cooled by one loop, and the 2 video cards get cooled by another loop.
Here is the system in my room. Yes, it is very messy.
One thing I am going to try is to hook up another radiator to the back of the case, behind the rear fan. That should help keep it cooler than what I am getting.