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I guess server coolers are running at full blast in order to pull air through whole ~60cm with obstacles. Look at CPU coolers, fin density is more or less the same and copper should work better that aluminum IMO. I'm gonna try some of these, but @1200mA or less The only thing i really worry...

I meant that CPUs are not running at full load 24/7. Idle power consumption is more like 30W i think. Also fans in servers are pushing through much more fresh air than my ~50cfm case fan.

Hey guys, What do you think about using fat 2U server coolers (smth like these http://www.ebay.com/itm/Intel-Xeon-2U-Passive-Heatsink-Dual-Core-5XXX-Series-LGA771-D36871-001-FRJ-/181749280545)? Of course not for that price, you can get this old stuff on craigslist rather cheap. Will it be...

Greengenes707, thanks a lot! voltage limit should not be a problem, as it's below 71 only when driver's fully dimmed to 700ma, i'll won't drive them that low. But i think I'll buy 1 more 2540 if the 1st won't have any cooling issues on 1400ma

Hey guys, been reading LED threads for a long time, but still having issues with electricity part, hope someone could help. I've bought 1 Cree CXA 3070 and 1 Cree CXA 2540 (just because both quite cheap). Initially planned to run 3070 with 1750ma driver or higher and 2540 with separate 1400ma...