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

Guys I want to run the citi 1212 at 1050 do you think this will keep it cool ?
http://m.servershop24.de/item/32373638
Its pretty heavy 700g each and has a copper base plate of 1/3 inch.
Here are some more pics
http://www.auctiva.com/hostedimages/showimage.aspx?gid=604149&image=380814442&images=380814485,380814442,380814531&formats=0,0,0&format=0
Going to run 60 pieces of them I will also put one big blow fan at the wall for them.

optzulu said:

Guys I want to run the citi 1212 at 1050 do you think this will keep it cool ?
http://m.servershop24.de/item/32373638
Its pretty heavy 700g each and has a copper base plate

Click to expand...

That looks like it wouldn't work without a fan, and with a fan would be overkill...so maybe?

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.

JorgeGonzales said:

That looks like it wouldn't work without a fan, and with a fan would be overkill...so maybe?

Click to expand...

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.

I can cut some fins NP
I understand what you say I looked at the alpine m-1 passive it keeps a 35w at 49celcius with only 250 gram of alu.
https://www.arctic.ac/eu_en/alpine-m1-passive.html

But like you said the fins have more room for air between, i need to cut some of that heatsinks

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 !!!!!

It's not passive.

to Support

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

Support | Tradeo GmbH





to me

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

OK, it's passive.

Maybe the clu058-1528 is a better choice for me and rund them high and just use a cooler with fan.
Can I run 4x clu058-1528 at 2100ma on one ?
http://en.hzzhpower.com/upLoad/product/month_1601/PF-P400CC-Cxxx-S(U)-XX.pdf

On the citi pdf it says that the voltage is between 47v min to 56v max. If its 2.10x47= Then its oke but if more then 49v then its to much

No he said inside the hp box and normally there allot of fans in a server box. It has 2 for each cpu
http://www.pcworld.idg.com.au/slideshow/295951/pictures-taking-apart-hewlett-packard-proliant-dl380-g5-server/?image=5

optzulu said:

Maybe the clu058-1528 is a better choice for me and rund them high and just use a cooler with fan.
Can I run 4x clu058-1528 at 2100ma on one ?
http://en.hzzhpower.com/upLoad/product/month_1601/PF-P400CC-Cxxx-S(U)-XX.pdf

On the citi pdf it says that the voltage is between 47v min to 56v max. If its 2.10x47= Then its oke but if more then 49v then its to much

Click to expand...

I don't know what the 1528 is, but the voltage lands where the voltage lands. Google "forward voltage".

Yeah I made a mistake its this one
http://www.tme.eu/en/Document/8d3da188a7a19f2f15b33eb988e2b79f/CLU058-1825C4-DTE.pdf

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!

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.