How long is the heat sink? 4x 3590s @56% would need at least 66cm of this profile if we are to follow 120cm^2/W_heat.Hi just wanting to confirm this heatsink 1 is big enough to handle
4 x CXB3590 3500K COBS @1400ma passively.
I'm pretty certain it can handle it and will probably only ever run them at around 1.05A.
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If SupaSPL or anyone could confirm that it's good enough for passive I'd be grateful.
Hopefully this will give the Oz lads something that will allow for passive running.
Just want to say I've been lurking for a while and the threads on RIU are really informative.
Thanks to all the community.
The Heatsink is 39.6 inches or 1000mm in length.How long is the heat sink? 4x 3590s @56% would need at least 66cm of this profile if we are to follow 120cm^2/W_heat.
Then you're good to go. Even 2/3 of the length would be sufficient. What about more COBs?The Heatsink is 39.6 inches or 1000mm in length.
Thanks for that information as it confirms what I thought. I'm only running 4ft wide so can't see much point. Besides want to run as cool as possible with good spread.Then you're good to go. Even 2/3 of the length would be sufficient. What about more COBs?
Gotta love a de facto standard!let me guess the last posts here the 3 of us all bought 3950's today
You're going for the 4x4(16 cob) bar set up...4 bars with 4 cobs on each. A great build and will do just what you are lookign for.i know its sooooo sick to ask what i did! i'm so lost as i had a great mock up of a fan cooling bar perfect.. i now have talk my self into passive cooling for 5 reason's
so to keep it simple 1 cob 1 sink cxb3590 36v i think or 32v something like that @50w, but i am one that will go over it and over it before i pull the trigger just want to know this for my own pice of mined and cost has no play on it not looking for the cheap way if the sink cost what it cost, it is what it is.. if you have watched the diy talk this week by GG that's what has started me down this road
thanks iceman3000
LOL i know i could count on you to chime in. was looking at the round ones you had on the new build as i was think to cut the wight and the inclosure as i'm not looking at the whole ul listing thing from the retail side.. frame them all together each fixture pulling less then 6 amps as amps is my problem will fill you in when we talk np..You're going for the 4x4(16 cob) bar set up...4 bars with 4 cobs on each. A great build and will do just what you are lookign for.
-Each bar will have four 48w 3590's running in the 55% range. So your looking at 21.6w of heat out of each cob...times four cobs...give 86.4w of heat for each sink to dissipate off.
-We were talking about the 5.88 profiles...great for either active or passive and favor passive. each inch of that profile has ~260cm2 of surface to cool. Recommended is around 110-120cm2 per watt of heat for passive cooling.
86.4heat watts x 115cm= 9936cm2 needed
9936cm needed divided by 260cm2 per inch heatsink = 38 inches of 5.886 profile heatsink is needed per four 3590's at 1400ma for passive cooling.
I would go with 40" to 45" bars to give you extra spread and extra cooling.
You could connect 4 bars together with some aluminum frame or L's and have only 4 big panels to deal with in a 10x10 room.
No questions asked that will replace a 1000w's of hps, gavita included.
Correct me if i'm wrong but this H/S should passively cool one cxb3590 @ 50WI hope this video is relevant to the thread…..I was just surfing around and stumbled across it. My apologies if it has already been posted somewhere and I missed it… Anyway....
I stumbled across that site and video by accident. Forgive me for my ignorance in not being able to answer your question. I was hoping that some of the "in-the-know" people would chime in.Correct me if i'm wrong but this H/S should passively cool one cxb3590 @ 50W
http://www.cutter.com.au/proddetail.php?prod=cut2489
@ $17 each you could passively cool twelve 3590's for $204, which seems like the cheapest option so far for those of us down under.
May solve the Aus passive cooling issue?
Yep the LSB9980 passively cools 30W so that should be enough for 3590s @ 1400 or less.Correct me if i'm wrong but this H/S should passively cool one cxb3590 @ 50W
http://www.cutter.com.au/proddetail.php?prod=cut2489
@ $17 each you could passively cool twelve 3590's for $204, which seems like the cheapest option so far for those of us down under.
May solve the Aus passive cooling issue?