FranJan
Well-Known Member
Sorry no. Can't be cheap but maybe. They might not even be out yet. Try these folks here.Looks nice.
Do you know roughly for what price they go ?
http://www.photonics.com/m/Product.aspx?PRID=57869
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Sorry no. Can't be cheap but maybe. They might not even be out yet. Try these folks here.Looks nice.
Do you know roughly for what price they go ?
Most of these heatsinks would be in servers and running 24/7 I would think.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 enough for running 2 CXA2540@1400mA? Planning to use them with Zalman 120mm coolers @9V. According to Cree, 2 COBs use 106W, assuming ~25% efficiency it's about 80W of heat. I guess CPUs are running approximately the same, but not 18 hours per day)
Also how hard things can be with drilling of copper? I've zero exp with it and only hand drill so it kinda bothers me. My Tyco connectrors require drilling
haha and you could not figure out a way to leverage them ?We have thousands of these for free, and I opted not to use them.
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I guess server coolers are running at full blast in order to pull air through whole ~60cm with obstacles.They may work if you constructed a large ridgid channel for a 6" or 8" inline to pull air through them at full blast - but if you apply a 50W load to them and they just have 1 fan it's likely you will have a very poor and load cooler.
And where's this? Certainly not in the data sheet.I might even try these http://www.tme.eu/en/details/of-lm004-30b380/white-power-leds-cob/optoflash/
http://en.honglitronic.com/index.php?m=Product&a=pro_detailed&gid=13
It's a somekind of OEM manufacturer and there is good amount of data about these. They look like a Crees chips.
BonjourVero13 is like ~35w max so it would be vero18 if you want ~50watts but afterall a difference is not so huge cos Vero18 is 10,70e and those are 8,45e (if bought more than five). I remembered Vero18 price wrong.
+1 airflow tend to be rather bad on server heatsinks. BUT if you use a blower type fan, or a high pressure one, you can achieve decent performances.I work on servers almost every day.
These heatsinks are meant to be in a case, which usually has 2-8 fans per RU on the front, and 0-8 on the rear along with power supplies loaded with fans . The heatainks themselves sometimes have fans as well. These are extremely thick high backpressure and and very short fans at 40mm or so and most run at extreme RPMs.. Their reliability is below that of an 80-120mm brand name fan by a lot. The servers generally run at 80-100% load at all times, because an underutilized server is like throwing 20k away day one and a hundred bucks daily after that for space, bandwidth, cooling, and electricity.
Most datacenters push a wall of chilled air into these things (cold side) and isolate and evacuate heat on the hot isle.
Servers run five 9s (99.999%) uptime only because they have redundancy, meaning you can lose about 30-50% of a device and it keeps working. Everything can get hotswapped with the exception of CPUs normally.
They may work if you constructed a large ridgid channel for a 6" or 8" inline to pull air through them at full blast - but if you apply a 50W load to them and they just have 1 fan it's likely you will have a very poor and load cooler. If you apply one of them to a desktop processor it will overheat or thermally throttle.
We have thousands of these for free, and I opted not to use them. They would probably passively support a 20-35W load just because they are a hunk of metal.
You said that this was to scale and I can count the pixels in paint to get exact distances.The amount of canopy each will cover depends on power, spacing, lenses, distance to canopy etc. A good starting point, we can space them as wide as possible on the heatsink. This diagram is to scale and you can count pixels with the MSpaint line tool to get the exact distances once you get an idea how you want it set up. I put the COBs on the corners a bit further from each edge and the COBs in the center closer to the edge
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