• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

CPU coolers

BOBBY_G

BOBBY_G

Well-Known Member
i see arctic64 are popular, many of these at newegg have no dissipation rating. i wanna make a few single cob fixtures for CXB3590s at 50-100W, also have some 30W 730 nm cobs that need a home.

i see the basic arctics start at $9 and theres also the arctic freezer 150W.

whats the best bang for the buck?

gimme something massive and sometimes ill dim and be passive!
 
frica

frica

Well-Known Member
The weakest Arctic CPU dissipates enough for a 65/70 watt CPU (Alpine 11/64 GT_.

COBs aren't CPUs, a 3590 is at least 35% efficient at +-100 watt so the CPU heat sink only has to dissipate 65 watts of it.
COBs are also much more resistant to heat than a CPU.
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/features/Cree-XLamp-CXA2-SD-Large-Feature-Sheet.pdf?la=en
http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/XLamp Application Notes/LM80_Results.pdf

The CXA/CXB arrays will be able to handle 105 degrees celcius* (which it will never reach with practically any CPU heatsink+fan) while every CPU ever would be fried at that temp.
So if it can handle a 65 watt CPU without shutting your PC down, then it can easily handle a 100 watt CXB3590.

The only thing that's important is that the 3590 (+ holder) fits on the heat sink.
Because every Alpine Arctic CPU cooler will have more than enough power to cool a CXB3590

*Not that I recommend running them that hot since they lose efficiency but it's an example that they take heat better than CPUs
 
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BOBBY_G

BOBBY_G

Well-Known Member
right..now that i think about it CPUs top out at 40-50C where a cob would be fine at that temp

so is 25-30C ideal for cobs with 50C as a practical upper limit? i see 10% droop from 25 to 50C on Tc per datasheet. is there any gain to cool below 25% or is it no/diminishing returns
 
ttystikk

ttystikk

Well-Known Member
frica said:
The weakest Arctic CPU dissipates enough for a 65/70 watt CPU (Alpine 11/64 GT_.

COBs aren't CPUs, a 3590 is at least 35% efficient at +-100 watt so the CPU heat sink only has to dissipate 65 watts of it.
COBs are also much more resistant to heat than a CPU.
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/features/Cree-XLamp-CXA2-SD-Large-Feature-Sheet.pdf?la=en
http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/XLamp Application Notes/LM80_Results.pdf

The CXA/CXB arrays will be able to handle 105 degrees celcius* (which it will never reach with practically any CPU heatsink+fan) while every CPU ever would be fried at that temp.
So if it can handle a 65 watt CPU without shutting your PC down, then it can easily handle a 100 watt CXB3590.

The only thing that's important is that the 3590 (+ holder) fits on the heat sink.
Because every Alpine Arctic CPU cooler will have more than enough power to cool a CXB3590

*Not that I recommend running them that hot since they lose efficiency but it's an example that they take heat better than CPUs
Click to expand...
Something to keep in mind is that even if the heat is efficiently removed from the chip with one of these, it's going straight into the growroom. It does not magically vanish.
 
frica

frica

Well-Known Member
ttystikk said:
Something to keep in mind is that even if the heat is efficiently removed from the chip with one of these, it's going straight into the growroom. It does not magically vanish.
Click to expand...
That's with any heatsink though
 
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