Originally posted by: SolMiester
For extra cooling, build a wind tunnel that surrounds the CPU cooler and has intake and exhaust from front to back on case as I have.....the tunnel isolates any heat or air from rest of case and also provides cool air from outside the case directly to the cooler....reckon its worth 5-10c depending on room temps
:thumbsup: :thumbsup: :thumbsup: :thumbsup:
[Two up on Siskel and Ebert: my big toes.]
I just replaced a 680i board with a 780i. The chipset on the 680i seems to be the culprit, and I have myself to blame for trying to get "ballpark" OC settings before better attention to cooling -- in my case, with ducting in an extension of Solmeister's suggestion.
Now I find that the superb fit I had with a TR "blue-rubber-duct-ie," CM 830 and Noctua NH-U12P cooler is gone: the Noctua sits closer to -- and off-center of -- the rear exhaust fan. I'll need to cut a duct-box like a parallelogram that mates to the rear fan.
All of this had two purposes. Reduce the number of fans, noise and wattage while increasing cooling effectiveness on specific components.
Thinking again of AigoMorla's constant advice to me that I should jump on a water-cooled setup, I started looking again at high-end kits. I trust Aigo's reports about lower temperatures, but I follow the ratings of thermal-resistance -- C/W. With these 45nm CPUs, it hardly seems worth it. The Noctua seems close or equal to $300 WC-kits in thermal resistance around 0.09 C/W. But with the clunky 780i chipset-cooler and ding-bat flimsy "Magic" fan that goes with it, water seems slightly more worth it for chipset cooling. Go figure. And I don't want that fan on there: I want to pull air through the chipset HS fins with a duct-box for immediate exhaust from the case with a larger fan.
All in all, I have a lot of work to do that would be partly eliminated or displaced with a water-cooled setup. That means pretending like I'm the "CSI" TV-series' "miniature serial killer" -- designing little boxes that fit together and channel air. I could take another month to complete this nonsense the way I want it done.
To recapitulate -- with the most efficient heatpipe coolers available today, the gains from ducting the cooler to immediately exhaust the air do not so directly affect CPU temperature as much as it keeps case-interior air-temperature down, keeping all component temperatures lower.
On the matter of "direct-IHS-water-cooling" -- AigoMorla is the authority on this, and I defer to him. I'll add this: in the interface between IHS and heatsink or waterblock base, thermal resistance is going to increase even if you replace the copper with solid synthetic diamond. That is, an impossible-to-obtain solid-diamond heatsink base may lower overall thermal resistance, but the thermal paste -- even with micronized diamond, will raise it slightly. Ask me about the solid silver-dollar I destroyed (adding two interfaces to replace one) -- hoping to capture the better thermal properties and mass of silver. More complexity to no effect, a total waste of time, and about $40 of a collector's-edition coin.