M4800 Owner's Thread

its a gap issue I suspect the die on T1000 is as low or lower than k1100m and or m5100, you need copper mid in sink protruding downwards to touch the die effectively. you may as well need to get your thermal pads to be right size, dell spongy green type are quite flexible in that regard but not as effective as Gelid 15 Wm/k.

now HOW where did you get that card man? I am not seeing any easy way to get it yet.

from your photo I can see edges and corner on die are both chipped, you sure its not a dud?

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thanks for the info, I suppose I’ll get an amd heatsink then. i have 2.5mm and 2.0mm 12.8w/mk thermal pads too so that should be fine.
I got the card from secondhand Taobao (Xianyu) a while ago and got it shipped through middleman service (superbuy), i dont think theres any other way

And ye i see the chips on the die
not looking good, hope its fine?

 

does anyone know if I can use a 2.0mm or 2.5mm thermal pad on the die area instead of getting the AMD heatsink? its 12.8w/mK thermal pads which is same transfer as thermal paste

 

Don't. You gonna need something way thinner, sub mm like paper thin.
Thermal pads above 10 w/mK are stiff, they don't compress very good, it will just break apart like dry dough
If you need a shim, buy a set of thin copper shims in increments of; sheet roll, 0.2, 0.3, 0.4, 0.5mm.

If you need guidance, try dry mounting the heatsink to the pcb and sandwich a feeler gauge between the die and heatsink.
Start with the thinnest and go up in thickness until you have good contact.

I would rather buy the amd heatsink.
https://www.parts-people.com/index.php?action=item&id=20134

 

thanks for the info man.
I checked my heatsink and it had a raised copper shim thingy on die area, looked like it would make sufficient contact
it's installed fine and working!
however, temperatures are not looking so good.
seems like the hot spot raises indefinitely (this took a few minutes of Heaven benchmark)
maybe it needs to be raised with a 0.2mm shim (or perhaps the dingy little m4800 gpu heatsink isnt cut out for this)

 

Got a picture of how it looks installed? I feel you may need some extra copper "extensions" along with the AMD heatsink.

 

Eh, at speeds pushing 2 GHz, high 80's temp in a laptop GPU would be pretty normal I think. Especially an old one with a "small" heatsink like this. Fastest NVIDIA GPU for the M4800 at launch ran at ≈700 MHz. (Technically the GPU should be fine even in the 90's and would throttle if it needed to.) Did you run it any longer than that? Does the temperature level off?

[Edit]
I was paying attention to "GPU temperature" and not "hot spot". Upper 90's is a little scary.

 

nope, i didn't take any pics but i'll open the laptop again and do that some time soon

Nope, i stopped it straight after that screenshot, I think it would have kept rising even with the fans running at full tilt it seemed.

Ye, it also doesn't really make sense to me, the FirePro M5100 I had in this laptop previously was a similar TDP I believe, about 50w power consumption so they should be comparable in temperatures. Think the extra shim is required, contact with the die must be poor

 

Here's my M5100 running Heaven Benchmark 4.0 all in max in opengl, ran it for ~15 min.
(not entirely sure about GPU load, can't get it to use 100%, it fluctuates between 100% and 66%)




Furmark does better at GPU Load, same result. ~52 - 53c.

 

GREAT NEWS guys!!

I have received the dual micro SD to PCIe adapter.




I added a 512 GB Lexar micro SD card and 200 GB Sandisk micro SD card to the adapter.
And I removed the original wifi card, added this dual micro SD adapter inside my M4800.



My laptop could recognize both micro SD cards as USB drives!
They're now my new internal storage!



I tested file transfer speed. I get 17 MB/s on the Lexar micro SD card. This is good enough for storing movies and hi-res music.

I can add up to 1TB per each micro SD card slot:
https://www.amazon.com/Lexar-Compatible-Nintendo-Switch-Smartphones-LMSPLAY001T-BNNNU/dp/B08T8LL7G8/ref=sxin_15_ac_d_mf_br?ac_md=3-2-TGV4YXI=-ac_d_mf_br_br&cv_ct_cx=1tb+micro+sd+card&keywords=1tb+microsd+card&pd_rd_i=B08T8LL7G8&pd_rd_r=2b50d18b-39ea-444f-b528-b47171949df1&pd_rd_w=E1irZ&pd_rd_wg=6FFpk&pf_rd_p=17756b3a-4504-468b-830d-8b5875afd168&pf_rd_r=0SRVR9Q4WSQ2RMR4HDEZ&psc=1&qid=1640231168&sr=1-3-ed8a42d3-65f1-4884-a3a2-0dd6e83b6876


However, only one of the PCIe card slots will work with the dual micro SD adapter.
I had to use the wifi card's WAN slot. The other slot didn't recognize the adapter.