General COB or Bridgelux Vero 18 cooling
- Thread starter WDIK
- Start date
Mellodrama
Well-Known Member
I can tell you from personal experience those damned Intel fans are very noisy at 12V. If you drive them at 6 or 7V you'd probably be OK. How would you attach the COB's?
Mellodrama
Well-Known Member
bicit, do you have any of those? I'd be very curious about the outer dimensions of the flat area at the base. I bought a few of those Ideal COB holders but they're too big for the heat-tube style heatsinks I've got layin' around. To install them properly you need a flat surface that's larger than the holder.
The CXA30 COB holder is roughly 2.4 inches (62mm) corner to corner, and about 2 inches (51mm) across the narrower cross-section. In other words, it's 2.4 inches across the longest axis, where those white plastic arms are located, and about 2 inches across the narrowest axis.
The CXA30 COB holder is roughly 2.4 inches (62mm) corner to corner, and about 2 inches (51mm) across the narrower cross-section. In other words, it's 2.4 inches across the longest axis, where those white plastic arms are located, and about 2 inches across the narrowest axis.
WDIK
Active Member
The plan (which can always change) is to have the COBs mounted to a board, and mount the heatsink and fan to the board. Thermal compound in between.
I ordered 8 of them. I'm impatient like that.
I couldn't pass them up for $5.25 each including shipping. Unless the noise is extreme, it shouldn't be a huge concern.I will let you know what I find out, as I plan to test whenever my drivers show up.
ETA: I should not have asked the question when my intention was to order them anyway. Poor forum etiquette on my part.
Keep an eye on this seller's auctions. He usually has a few good deals on scrap heatsinks that are perfect for this sort of stuff.
Personally, I would use one with copper base.
http://www.newegg.com/Product/Product.aspx?Item=N82E16835200014
http://www.newegg.com/Product/Product.aspx?Item=N82E16835200014
WDIK
Active Member
That looks great, but 3x the price.
I will for sure keep them in mind if the ones I ordered don't work out.
Gaius
Active Member
These are the ones I used in the Battlestar Gangactica. Silent even at 12v and runs nice and cool with Cree CXA3070s. 2day prime on amazon. Great buy!
MrFlux
Well-Known Member
Yes that Arctic fan is better, it has fluid dynamic bearings.
SupraSPL
Well-Known Member
Very nice price and good to know they are quiet. Any word on your heatsink temps gaius?
They have a big brother too
They have a big brother too
SupraSPL
Well-Known Member
These are very nice. After looking over the Cree CXA LED Design Guide I am more convinced that putting work and care into the thermal interface is well worth it
WDIK
Active Member
You people should get commission from Arctic. I have Prime so have a few coming. The Intel's can go back on Ebay.
I might be able to get this thing built this weekend.
Copper TIM has a Tj of around 80d with 3050 chip.
Alum blocks on these are well designed, depth and
thickness, fans whisper quiet, but a bit pricey = quality.
Alum blocks on these are well designed, depth and
thickness, fans whisper quiet, but a bit pricey = quality.
Similar threads
