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Thinking of putting 3x cxb3590 on a extruded aluminum heat sink with these dimensions 500mm long by 125mm wide by 35 mm high. I'm planning to run them at 1800 mah with a couple pc fans on the back. Do you guys thnk this could cool them? I've currently got one of these heat sinks built with only 2 cxb 3590s running at 1400 mah. With one arctic alpine 11 pc fan on the back and it stays under 25 degrees on the back of the heat sink directly above the cob