Sujet : Re: Effect of colour in SSD heatsinks
De : jl (at) *nospam* glen--canyon.com (john larkin)
Groupes : sci.electronics.designDate : 03. Jun 2025, 00:31:41
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <kics3kl4n7nan1el7d6pvo4ekc3nr857qi@4ax.com>
References : 1 2
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On Mon, 2 Jun 2025 22:52:29 +0100, Martin Brown
<'''newspam'''@nonad.co.uk> wrote:
On 01/06/2025 17:40, Pimpom wrote:
I'm thinking of installing simple heatsinks on the SSDs in my desktop
and other computers. The SSDs are seldom subjected to heavy write loads
and can do very well without the add-on heatsinks. But the peace of mind
they bring is well worth the price of UD$1.10 apiece in a pack of 5.
Here's an example: https://tinyurl.com/mpjar5bw There's a choice of
three colours on Amazon India - black, gold and plain aluminium. How
much of a difference, if any, will the colour make when fitted inside a
computer case? I expect that cooling will be mostly by convection than
by radiation.
>
It depends a lot on how hot things get. Metallic surfaces make lousy
radiators and so are very bad for heatsinks if deltaT > 30C or so.
>
Forced air ventilation it won't make that much difference. Unless the
SSDs are being hammered it seems unlikely that they need heatsinking.
Worth monitoring them rather than waste your money on toy heatsinks.
This is more of an academic interest than of practical requirement
because, as I said, the heatsinks are not a necessity.
>
I once had a 12v PSU with a 7812 regulator go into thermal foldback
because the case was nice mirror finish shiny aluminium metal.
A coat of black paint fixed it.
>
(any colour of non-metallic paint is black in thermal band IR)
Right, most anything organic has high emissivity. Kapton or electrical
tape, most any paint, even white white-out glop.
I had a brass-based incendescent lamp. The brass part looked room
temp in a good Flir imager, but would burn your finger bad if you
touched it. Brass and copper are mirrors at 10u.
Interestingly, water or ice or snow are black at thermal wavelengths.