Laforet

You can try the silverstone NT-06 lite or evolution if you can find one used, not worth the price new but fits neatly under the PSU with widely spaced fins for passive/low flow cooling

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FYI:
1. No LLC or volt-mod for 24/7.
2. Windows 7 is Vista in disguise, you are better off with the latter before Windows 7 SP1 comes out.
3. For 45nm silicon, 1.45V in Vcore is not unsafe, however 1.3V in Vtt already is.
4. LGA1366 for SLI/CF.
5. Performance Enhance to Standard for memory issues on Gigabyte boards.