As mentioned earlier, we placed thermal probes at 5 strategic locations.

We placed one just about 1 cm away from the CPU heatsink to monitor the temperature of the air here.

We placed one in the small space between the first 7800GT and the second 7800GT,

We placed another one very close to the second 7800GT.

We had to keep the SFF case closed when doing the thermal checks so these 3 thermal probes were slid through the intake slits on the side of the case.

We had one thermal probe right behind the exhaust of the power supply.

And we had the final one up aginst the back of the casing, touching its aluminum surface.