After looking around a little I think that with your current setup thats about the best you'll do. Your CPU block has a c/w of about .176 as reported by joe c, I could not find a c/w for your rad so for grins and giggles we'll use numbers from The Thermochill 80mm as tested by BillA as about .12 or so (with a Delta EHE). So neglecting the heat added to the loop from the gpu the total c/w is .296. Your slk-947u has a c/w of .29 in silent mode per CaseMod.com so we have a diference in c/w of .006 c/w (or about .6c for a 100w cpu) there. Now add in the added heat of the chipset block and the fact that the Micro will not perform as well as the Thermochill and you will find the 2c that went missing. Sorry to say high end air cooling can exceed the performance of low end water cooling. Those little c/w numbers add up fast when you multiply them by 100 or so watts.
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