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Author Topic: Modem chip got heatsink on it.  (Read 485 times)

neil

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Modem chip got heatsink on it.
« on: January 15, 2020, 04:01:40 AM »

I opened my modem and i saw heat sink installed on it. With 2 thermal pads on 2 chips. Every modem has heat sink in it or not?
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Alex Atkin UK

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Re: Modem chip got heatsink on it.
« Reply #1 on: January 15, 2020, 08:47:18 AM »

Not at all, it depends what chipset it uses and (unsurprisingly) how powerful it is.

The WiFi chipset will usually have an RF shield on it though and a modem/router combo with WiFi is more likely to have a faster CPU thus more likely to need a heatsink.

That's a pretty pathetic one to be honest (I can't see any fins), but I'm sure it does the job fine.
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neil

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Re: Modem chip got heatsink on it.
« Reply #2 on: January 15, 2020, 06:55:57 PM »

Not at all, it depends what chipset it uses and (unsurprisingly) how powerful it is.

The WiFi chipset will usually have an RF shield on it though and a modem/router combo with WiFi is more likely to have a faster CPU thus more likely to need a heatsink.

That's a pretty pathetic one to be honest (I can't see any fins), but I'm sure it does the job fine.
yes with two fins only and thermal pads are thick there were 2 broad com chips i think one under the heat sink and one without heat sink and it got some metallic tape on it
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neil

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Re: Modem chip got heatsink on it.
« Reply #3 on: January 15, 2020, 07:30:26 PM »

here the pictures of chip please if you have any info about it please do share
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burakkucat

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Re: Modem chip got heatsink on it.
« Reply #4 on: January 15, 2020, 08:46:04 PM »

Having downloaded both images and zoomed-in on the relevant areas, I see --
  • BCM43217TKMLC  (the smaller of the two)
  • BCM63381UKMMLG (the larger of the two)
The larger one, the BCM63381, is the SoC.
« Last Edit: January 15, 2020, 09:01:54 PM by burakkucat »
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neil

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Re: Modem chip got heatsink on it.
« Reply #5 on: January 15, 2020, 09:00:29 PM »

Having downloaded both images and zoomed-in on the relevant areas, I see --
  • BCM43217TKMLC  (the smaller of the two)
  • BCM63381UKMMLG (the larger of the two)
The larger one, the BCM63381, is the processor chip.
heatsink was installed on two big chips with thermal pad of same size as chips. I hope i didn't mess the thermal pads by removing and installing them again and what is this ESMT chip? is it for lan?
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neil

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Re: Modem chip got heatsink on it.
« Reply #6 on: January 15, 2020, 09:14:31 PM »

on the smaller chip 3 w is written i think. Is it power of the chip? and whats written on the bigger chip i think .3B w or 3B w is written
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burakkucat

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Re: Modem chip got heatsink on it.
« Reply #7 on: January 15, 2020, 09:33:37 PM »

. . . what is this ESMT chip?

The Elite Semiconductor Memory Technology, Inc., M13S5121632A is a DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memeory) chip of 8M x 16 Bit x 4 Banks.
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burakkucat

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Re: Modem chip got heatsink on it.
« Reply #8 on: January 15, 2020, 09:36:26 PM »

on the smaller chip 3 w is written i think. Is it power of the chip? and whats written on the bigger chip i think .3B w or 3B w is written

I'm not sure of those sections of the markings. Could you use a magnifying glass for a closer look?
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neil

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Re: Modem chip got heatsink on it.
« Reply #9 on: January 15, 2020, 10:24:21 PM »

I'm not sure of those sections of the markings. Could you use a magnifying glass for a closer look?
i am using the same modem right now for internet but i have original 3 4MB pictures with me i took earlier when i opened the modem  if you want i can send you
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neil

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Re: Modem chip got heatsink on it.
« Reply #10 on: January 15, 2020, 10:34:02 PM »

I'm not sure of those sections of the markings. Could you use a magnifying glass for a closer look?
here is zoom in picture
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burakkucat

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Re: Modem chip got heatsink on it.
« Reply #11 on: January 15, 2020, 10:52:09 PM »

Ah, that's definitely clearer. But I don't have an answer for you.

Perhaps other members may be familiar with those two Broadcom chips (or have the patience to perform a series of Google-searches) and will be able to assist.

And the modem/router is, I believe, a FibreHome HG150-UB.
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neil

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Re: Modem chip got heatsink on it.
« Reply #12 on: January 15, 2020, 11:04:42 PM »

Ah, that's definitely clearer. But I don't have an answer for you.

Perhaps other members may be familiar with those two Broadcom chips (or have the patience to perform a series of Google-searches) and will be able to assist.

And the modem/router is, I believe, a FibreHome HG150-UB.
yes HG150-UB
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PhilipD

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Re: Modem chip got heatsink on it.
« Reply #13 on: January 16, 2020, 08:04:34 AM »

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neil

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Re: Modem chip got heatsink on it.
« Reply #14 on: January 18, 2020, 07:59:00 AM »

Hi

The chip is here https://www.broadcom.com/products/wireless/wireless-lan-infrastructure/bcm43224 it does the Wi-Fi.

Regards

Phil
wow here it says 2.4 and 5GHz but i only have 2.4 in my modem. Why is that?
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