I have seen coolers that have a TEC between the CPU and the HSF and the TEC is activated only when the processor reaches a certain temperature, wouldn't the TEC add thermal resistance and give worse temperatures when not activated?
I always try to have a TEC at least twice the wattage as my OC'ed chips heat output, 3x is even better. You really want WC on any TEC if your OC'ing it, a HSF, unless it the size of a small state, isn't very effective. If you use a underpowered TEC you will run hotter then a HSF or WC'ing, to small a TEC and you can kill your chip from the heat, I don't know if you can set a shutdown temp for a GPU, if you can I would.
Really for a GPU I'd just do a hard core WC on it, if your volt modding it or doing insane clocks, and get a GPU dry ice/Ln2 pot for benching.
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