I used a Gigabyte DS3 motherboard and E8400 processor for the testing.
My DFI motherboard isn't working, and the Gigabyte motherboard can't
handle the load of a quad at high frequencies. I used Prime95 version 25.5
running small FFTs for an hour for each set of temperatures.





With no load except for the heat dump from the pump ( approx 20 watts ),
I got these temps:

AMBIENT (29.4 deg C)


HOTSIDE WATER (34.6 deg C)


COLDSIDE WATER (-6.4 deg C)



Then I tried it out with the E8400 at 1.15 volts and 3.0 GHz. I can't find
a consensus on the heat produced by the processor. I've seen a range
of 30 to 65 watts. So, the total heat load at these settings ( counting
pump) is 50 to 85 watts.

AMBIENT (29.5 deg C)


HOTSIDE WATER (35.2 deg C)


COLDSIDE WATER (-4.7 deg C)



Next, I overclocked to 4.0 GHz and 1.35 volts ( 100 to 140 watts load)



AMBIENT (30.6 deg C)


HOTSIDE WATER (35.9 deg C)


COLDSIDE WATER (-1.6 deg C)



I ran one more test this afternoon ( no pics for this one). I'm unfamiliar
with the Gigabyte motherboard, so the highest overclock I've gotten
so far is 4.32 GHz at 1.45 volts. It was prime stable for 7 minutes, and these
are the temps I recorded:

Load - 140 to 160 watts
Ambient - 31.7 deg C
Hotside - 37.4 deg C
Coldside - 0.9 deg C

I tried to use RealTemp and CoreTemp to record the CPU temp, but
neither program could read the temp at 3.0 GHz ( the temp would not change
between idle and full load ), and I don't trust what they reported at
4.0 GHz. At 4.32 GHz, CoreTemp showed 32 C and 27 C, and RealTemp
showed 23 C and 17 C ( the waterblock mount is definitely not good,
but that doesn't matter at this time - this is a temporary set up).