Is this a Vero 29 killer?

seems reasonable, so bump the advantage for the citis 10% or more.

also, looks like the horti citis are some old discontinued product? cant find that anywhere
 
BOBBY_G said:
seems reasonable, so bump the advantage for the citis 10% or more.

also, looks like the horti citis are some old discontinued product? cant find that anywhere
Click to expand...

It's not the horticultural crap that matters, it's that they list PPF of their other cobs to compare. Maybe they were great, who knows, but with logic like A-PPF, I'm not so sure.
 
makes sense on the 90s look how they hit 630-680 so hard

all the 80 cri 3500s (both citi and cree) are blowing their wad between 580 and 630
 
It stays pretty cool no matter what u give between 5-12 volts with 50 watt ledchip. Weight is almost 700g. Maybe 70-80 watts is max what i would give them.
71Ktiews1gL._SX425_.jpg

772380972_tp.jpg

fan.jpg
 
JorgeGonzales said:
That looks like it wouldn't work without a fan, and with a fan would be overkill...so maybe?
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Then maybe 700ma more spread better effi and lesser cooling.

Hampster you mean with ore withouth fan ? Have you worked with these heatsink ? 1050 = 36w 700ma= 24.4w so not 50watt
 
optzulu said:
Then maybe 700ma more spread better effi and lesser cooling.

Hampster you mean with ore withouth fan ? Have you worked with these heatsink ? 1050 = 36w 700ma= 24.4w so not 50watt
Click to expand...

It needs a fan because of the design. It will act like a solid hunk of metal without some airflow. You'll notice passive heatsinks have wide fin spacing, CPU coolers are much more tightly packed. Natural convection stops happening with close spacing.
 
Straight from the horses mouth.

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Support | Tradeo GmbH <[email protected]>
May 31 (9 days ago)
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Hello,
it's up to 120W inside the HP DL380 G5 server.

Mit freundlichen Grüßen / best regards
Libor Herudek

Tradeo GmbH
Berg 24
D-84104 Rudelzhausen
www.tradeo-gmbh.de

Thats Passive !!!!!
 
to Support
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Before I make my decision to purchase can you confirm whether the 120w dissipation is active (with fan) or passive. My intention is to use this heatsink to cool passively, without the use of fans,

many regards

the answer

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Hello,
the heatsink is passive. And it also fit only in the mentioned HP models like DL380 G5 and DL 385 G2 / G5. The heatsink is own-production from HP. It can not be used universally.

Mit freundlichen Grüßen / best regards
Libor Herudek

Tradeo GmbH
Berg 24
D-84104 Rudelzhausen
www.tradeo-gmbh.de
 
yes as you will see from this thread and others, 1825 and 1212 stand alone at the top of the hill of current cob tech
 
georgianhouse said:
Straight from the horses mouth.

<snip>
it's up to 120W inside the HP DL380 G5 server.

Mit freundlichen Grüßen / best regards
Libor Herudek

Tradeo GmbH
Berg 24
D-84104 Rudelzhausen
www.tradeo-gmbh.de

Thats Passive !!!!!
Click to expand...

I think you're forgetting the 6 2" fans mounted to the front/back of that server case (and the power supply fan) that create a dedicated channel of airflow through the case and over the heatsink so it's not really the same as getting hit once every 10 seconds by an oscillating fan.
I know of no HP server (standalone/rackmount/blade) that doesn't sound like a 747 starting up due to fans.

That said, you could mount the heatsinks in a 5" rail with a fan on one end and simulate that type of design for airflow over multiple sinks and keep them well cooled.

EDIT; Forgot to say thanks to Jorge for his research into Citis!
 
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BOBBY_G said:
yes as you will see from this thread and others, 1825 and 1212 stand alone at the top of the hill of current cob tech
Click to expand...

Would your mind change if the 1812 was $15-16? It's 98-99% of the 1818 below 50W, and destroys the 1212 above that. I'd say it's worth an extra $3, personally.

Heck, I'd happily replace my 1818s with them at the 700ma I run. There's only 2lm/W difference.
 
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