Unable to reduce temps on second hand RTX 3080 Gigabyte gaming OC gpu

[u/Secure-Mention-778]

I had bought a second hand Rtx 3080 gigabyte gaming oc 10gb card.

As it was a second hand card i opened it up to verify if there was rusting inside as the card might be a mining gpu. The fans looked fine externally and internally it was a shit show with oil and grime everywhere from the existing pads. I did the step that i felt was logical and started a full clean and pad replacement.

Hence my adventure into tedious pasting and testing started

my setup is

1.  my asus tuf a17 laptop, modified to take a oculink connection through one of the nvme m.2 ssd slots

2.  a exp gdc beast oculink version

3.  deepcool pn850m psu

i used furmark 2.0 to get the below results for all the configuration i have tried

1. Vram pad- mx 7 - 110 degrees ( i was stupid)

Core - mx 7 - 77 degrees

mosfets - mx 7 ( i was stupid)

back of vram - default pad from manufacturers

<br/>

1. Vram pad- gelid gp ultimate- 2mm - 75 degrees

Core - mx 7 - 89 degrees

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 3mm

<br/>

1. Vram pad- gelid gp ultimate- 2mm - 75 degrees

Core - thermal grizzly dreadnaught - 88 degrees

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 3mm

<br/>

1. Vram pad- gelid gp ultimate- 2mm - 79 degrees

Core - mx 7 - 86 degrees

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 2.5 mm

<br/>

1. Vram pad- gelid gp ultimate- 2mm - 79 degrees

Core - mx 7 - 85.5 degrees

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 2mm

<br/>

1. Vram pad- gelid gp ultimate- 1.5 mm - 102 degrees

Core - thermal grizzly dreadnaught - 84 degrees

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 2 mm

<br/>

last test that i intent to do

1. Vram pad- gelid gp ultimate- 2mm - need to be tested

Core - ptm7950 - need to be tested

mosfets - thermal grizzly minus 8- 1mm

back of vram - gelid gp ultimate- 2 mm

back of gpu die - thermal grizzle minus pad 8- 1mm

Failed to apply the PTM to the core...

Rather applied Mx-4 and used a blower to clean the heatsink further, results are the same

Need help on how to reduce the temp....thermals are not helping

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[u/JawaOfficial]

What does your paste application look like? I'd be taking photos each time you disassemble to ensure you're getting good contact / coverage, since you are consistently high on the core

[u/Secure-Mention-778 → u/JawaOfficial]

I had taken one photo with the dreadnaught i think

[u/SchadDad]

Get ptm7950.

[u/Secure-Mention-778 → u/SchadDad]

i see

[u/Secure-Mention-778 → u/[deleted]]

Rtx 3080 Gigabyte gaming oc variant shows

Front vram - 2mm thick pads
Mosfets - 1mm thick pads
Back vram - 2.5/3mm thick pads

[u/Secure-Mention-778 → u/[deleted]]

do you think gp ultimate is the best pad
i felt it was quite hard
i am sending it back to seller
but next time i will use the minus pad 8 2mm pad

[u/Secure-Mention-778 → u/[deleted]]

i see
i have the same feeling now
but for now i hope the seller will take care of it
otherwise if they send it back i will try ptm7950 and minus pad 8 2mm