I was digging through some old stuff on a hard drive I had migrated out of my system and I managed to find some data from when the system was air cooled. I figured this might be of interest to those watching the thread that were wondering about temps and how much an improvement the water cooling has made. Well these numbers should give you a good idea of how things have changed

I'll leave a few notes at the end of the post as well.
Initial setup notes:
CPU load is tested with Prime95 small FFT loads. GPU load data is taken running Furmark.
Air cooled idle (stock frequency & voltage):
Ambient: 77*F (est 25*C)
CPU Cores - 40/36/40/35 *C
VREG - 58*C
GPU - 52*C
GPU VDDC - 55*C
Air cooled load (stock frequency & voltage):
Ambient: 77*F (est 25*C)
CPU Cores - 64/62/64/62
GPU - 75*C
GPU VDDC - 77*C
Air cooled load (4.0ghz overclocked):
Ambient - 77*F (est 25*C)
CPU Cores - 79/77/79/76
VREG - 88*C (!!!!)
GPU - 79*C
GPU VDDC - 83*C
Water cooled idle (stock frequency & voltage):
Ambient - 80*F (est 27*C)
CPU Cores - 34/30/33/30
VREG - 48*C
NB - 35*C
GPU - 37*C
GPU VDDC - 35*C
Water cooled load (stock frequency & voltage):
Ambient - 80*F (est 27*C)
CPU Cores - 50/48/48/49
VREG - 51*C
NB - 35*C
GPU - 51*C
GPU VDDC - 53*C
Water cooled load (3.8ghz overlocked):
Ambient - 81*F (est 27*C)
CPU Cores - 54/53/54/55
VREG - 54*C
NB - 35*C
GPU - 53*C
GPU VDDC - 56*C
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I have to admit I'm pretty satisfied. I did expect a little bit better temps on the CPU, but part of that might be from mounting the block sideways. This d0 has always been odd. It seems to idle very hot but still wind up at the same load temps as other 920's I've seen. It's a bit odd that the NB doesn't change at all from idle to load. Maybe a bunk sensor or something.
The load temp for 3.8ghz has gone up a bit since my last post, coming in now at 58/54/57/55. Probably cause this thing is toasting my office, lol. Cores also have a tendency to give strange numbers for the first and last. Occasionally I see numbers like 58/53/56/49. Again I'm guessing this is because of the odd placement of the block. One core might be getting a good blast of water while one is left on the outskirts. When I tear down the loop for maintenance I'm gonna do what I talked about earlier and place another 45 on the CPU block so I can mount it the correct way to see if that helps with closer core temps.
I plugged in the bitspower water temp sensor and placed a probe at each of the rad air intakes to try to obtain my delta as well. Both of the rads read the same for air intake (case is open right now). Delta at idle came out to 5*C and load was around 7*C. Seems like reasonable numbers to me. I expected my delta to be pretty good since I have a bit of overkill on rad space for the parts I'm cooling.