Answer is ........HC1000 will cool everything in my sig to below 12 degrees C. Beyond that point, condensation raises it's ugly head. HC500 will only bring it down to 20 degrees under full load.
It actually works much better if you turn off all your radiator fans. I now run normal watercooling when doing mundane stuff, CPU temp is 40 degrees C @ 4.2GHz, but turn on the HC1000 when I start gaming and raise the QX9650 to 4.4GHz with temps at 17degrees C.
Hailea thermostat is set to 17 degrees to get this. Whatever you set at the thermostat is what the water chills to.
It's a big sucker though and very load. needs to be in another room or put into an acoustically damped and well ventilated enclosure.
Hope this helps
Putting the same Chiller into a Rampage 2 Extreme, Core I7 extreme, Tri GTX280 ( all watercooled ) system next week and confidently expect to see the same results. Dual 4870X2's actually produce more heat then Tri GTX280's
Edit:- I tried the HC150 and it cooled the water down only 5 degrees, so do not waste your money on anything less that the HC500. This is a minimum standard if you are cooling big Graphics horsepower.
I previously used phasechange cooling but wanted a system that does not play up every second day due to condensation issues. this setup lets your precisely adjust temps to suit your heat load without the hassle of worrying about condensation screwing up your hardware.
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