Repasting GPUs - what difference it makes! Thank you everyone!
Posted by gmc2000@reddit | buildapc | View on Reddit | 31 comments
Wanted to make this post to not only say a massive THANK YOU to anyone who've contributed to the conversation of repasting GPUs but also making it into an environment who a newbie, like myself, can feel safe about doing so.
Today, I finally got all the supplies I needed to repaste my GPU.
I have a Palit 3080 Ti Gaming Pro (paired with a Intel i5 12th gen, inside an SFF-case in the form of the NR200p Max).
Before repasting, my GPU's fans would hit 4000rpm on running benchmark software like Heaven and Superposition, or playing games like Hogwarts Legacy.
On HWinfo, my core clock would hit between 75-80 C but hotspot temp was around 105 C. Of course anyone can see that's a problem but not knowing how to repaste (and having not done it before, it took months of reading to dive into it!).
First steps I did was undervolt and set an aggresive fan curve as advised by some of you (again, thank you!). This helped a bit but at the cost of performance.
I achieved an undervolt of 0.775mV hitting clock speeds of 1755mHz. Average FPS on Superposition benchmark (8k) was 50.13 with a score of 6702.
Now, it's not bad or anything but that +/- 30 C difference between core and hot spot temperatures was still bugging me a lot.
So I went into research mode and got the following:
- PTM7950*
- Thermal Putty**
*Seems the consensus is that this is the way forward and produces outstanding results.
*Unfortunately for this model of GPU, the right thermal pads are almost impossible to buy so I went with putty.
The work itself was without it's challenges but lots of videos out there for specific card models so I was able to follow safely.
I'm beyond stoked to report that on running a stock settings benchmark on Superposition after repasting and changing pads my GPU is now reporting:
- 1980mhz
- 71.2 core max temp
- 79.9 max hot spot temp
- 52.88 average FPS
- 7070 score
These are unbelievable gains at stock and I'm still blown!
I am currently tinkering to OC and undervolt and currently my most stable settings achieved is:
- +255mhz core clock offset
- +1150mhz memory clock offset
- 0.825mV undervolt
This is giving me:
- 1875mhz max clock speeds
- 66.4 C max core temp
- 73.5 C max hot spot temp
- 55.97 average FPS
- 7483 Superposition score
The other best part is that the fans are now so silent. None of the benchmark maxed my card RPM and I have my case fans running to a decent rpm noise-wise as well.
I truly underestimated the effect repasting and changing thermal pads have on a GPU and I wish I've done it sooner. I highly recommend the process if you have a card like mine that's a few years old. I definitely feel like I just got a brand new card.
omnomnilikescandy@reddit
Can vouch for that AliExpress store! My hot-spot delta managed to drop to 5C under max fan speed
MXVIV@reddit
Or just install afterburner and tune down the fan curve…
THe_PrO3@reddit
Redid thermal paste and thermal pads on my 2070S a few years ago and wow it's so good. My Hotpoint on my CPU went from 108°c (I know, yikes, fans were going nuts every time it would get too warm) and it went down to a solid 80°, still not perfect but that was mostly due to an improper cooling setup. Still though it makes a huge difference
gmc2000@reddit (OP)
Thats great to hear a similar experience! Mine went that way too. Hotspot around 105 and now down to 75 give or take. It’s a crazy difference! And you’re right, the best bonus are the fans not going crazy and sounding like the whole pc is going to take off.
Sweet_Sir_2143@reddit
Thanks for this post. I have an RTX 3080 Ti with the same crashing problem. My NVIDIA Auto Tuning glitched and caused crashes i cant turn it off for some reason.
I checked my HWiNFO logs and right before the black screen, my Hot Spot hits 98°C and the power instantly trips from 338W to 0W.
I made a post in a different subreddit but didn't find the solution80% of people said it was a power problem, which is not the case. I'm a noob at this too, but I'm going to try the PTM7950 and Thermal Putty to see if it stops the crashes. Thanks for the guide.
q-milk@reddit
You talk about undervolting 0.825mV and 0.775mV. This is meaninglessly small number. Normal voltage fluctuations are 20x this.
gmc2000@reddit (OP)
Huh? Not to be rude but I’m not sure you understand how undervolting works. Or maybe I don’t.
My card at stock settings is pulling 1.081mV topping at 1980mhz.
With my current OC and undervolt, it’s limited to 0.825mv but peaking at 1890mhz.
For the roughly the same performance, I’ve told the card to require less power (about 0.250mV). Thats not small in GPU terms.
q-milk@reddit
I am an electrical engineer designing ASICs for a global company
gmc2000@reddit (OP)
Oh would be great to understand why people undervolt and if there’s any point to any of it if you say so otherwise? Like coming from an expert, I’d definitely love to heart it and I think so would everyone else.
q-milk@reddit
Undervolting is great. It is not a linear reduction in power per operation, but more a quadratic, and ever more for the entire system including fans and PSU. Run it as low as you can accept. You may not see any performance degradation since your card now will not do any thermal throttling. If you go even lower you might loose 2% FPS and get the GPU down to 70°C
gmc2000@reddit (OP)
Ah yeah, I see what you mean. The values alone don't really tell much of the story. I was merely using it as those are the settings you tweak on Afterburner - clock speed, voltage, and memory speed.
As a reference, I'm now able to play Hogwarts Legacy at still Ultra settings but rather than temps reaching 65-70 C, it's now dropped to 39-40 C.
Aranxi_89@reddit
Putty works but you may see some flow if you vertical mount. This is less of a problem if you get thermal pads.
Thermalright has 0.5mm, 1mm, 1.5mm, and 2mm thermal pads. I was able to fix my issues using them. Maybe give them a try?
gmc2000@reddit (OP)
Are your temps okay following this? If I see a flow problem then I'll report back here and might go thermal pad directions using the article you posted above if you haven't found any issues.
Aranxi_89@reddit
Thermal putty of good quality should be fine, especially if you have the GPU mounted normally (horizontal). Just keep an eye on it but it should work fine.
gmc2000@reddit (OP)
I unfortunately have my GPU vertically mounted due to my case only having that configuration (NR200p Max). I'll keep an eye for sure and thanks for flagging this with me.
Aranxi_89@reddit
Yeah if you got good ones, they shouldn't break down and release oils, so you should be okay. Putty is pretty viscous so they shouldn't have that much flow, but just keep an eye on it once in a while.
I'd personally put pads on, because of how messy putty can be, but good quality putty is actually better at thermal transference than most pads.
gmc2000@reddit (OP)
Yeah that's what discouraged me for so long to open my GPU up because I couldn't find anyone with a personal anecdote about using thermal pads with this specific model of GPU. The initial putty's I saw were so messy and I didn't want to do that and deal with cleaning later on if I had to. Lucky this jarapad extreme I found highly recommended and tested is like clay texture.
Aranxi_89@reddit
Yeah don't worry too much about pads, they can squish a little bit and work just fine. As long as your die has decent mounting pressure, you should be okay.
I don't like using putty, but I had to use it for my laptop (imagine trying to work on the PCB of a whole ass laptop lol). MSI had made a pretty good laptop, and then just proceeded to let a fucking monkey do the putty work for some reason. Half the VRAM wasn't even covered properly, and some VRMs didn't even get any! You can tell they're supposed to have some because there's copper contact surfaces on the heatsink side for it, but... there just wasn't any putty there. And where there was putty, oh boy, the putty was somehow both excessively applied, and also not applied at all, because they somehow missed... completely.
But yeah, I immediately swapped the thermal pads and paste on my 3080 because they're known to be bad. Did it right the first time and it hasn't had any problems since.
Same goes for the laptop, didn't even bother to use it before I started fixing the thermal putty and paste. No problems since.
gmc2000@reddit (OP)
Sounds painful on a laptop and dealing with shit putty. I could definitely see how that's put you off it massively.
Great to hear that you have 0 problems too since repasting and changing thermal pads. I'm definitely on the boat that people should do it!
gmc2000@reddit (OP)
Hey man appreciate the comment. It was definitely something I considered but the Palit 3080ti Gaming Pro model uses some weird thickness for thermal pads that would have included me compressing or stacking thermal pads to achieve the desired thickness suitable.
I'm not in a position to be testing each thickness and opening the GPU each time to achieve desired results unfortunately.
I based this finding off JiMRPG's videos. You can find one here.
I'll keep an eye for flow and if they pose a problem. I used a putty that's on the thicker side. Jarapad Extreme.
Aranxi_89@reddit
Oh that those are fine, you're set. That's a good putty. They used to be called Upsiren UTP-8. One of the better putties out there, and very well priced.
Robobvious@reddit
I don’t think I even knew you could replace the thermal paste on a gpu. Neat! I’d be interested to see the application process if you have a tutorial video you followed. Great post!
gmc2000@reddit (OP)
I was in the same boat few months ago! There's definitely a risk to it than repasting a CPU and also do not advise if said card is still in warranty.
I would definitely recommend using PTM7950 rather than a thermal paste, consensus from community is that it's so much better at thermal conductivity but also creating an even coverage/spread.
I added the videos above as well as where I got the PTM7950 (and a few other videos too that you might find useful!).
And thank you so much!
alvarkresh@reddit
How did you get the right thickness for the thermal putty?
(also, great job! :D )
gmc2000@reddit (OP)
Thank you mate! :D
I followed this video here which included a thermal putty calculator based on thermal pad thickness and length -> https://www.youtube.com/watch?v=MhrykJtrfBA&t=870s
Have also added above.
lain_pier@reddit
I have the same GPU! If you don't mind linking the videos and supplies I would appreciate it!
gmc2000@reddit (OP)
Hi, I've added the videos and where I got the specific supplies. The supplies where recommended by Snarks Domain who's active on this subreddit, advising on Thermal Putty use.
I highly recommend watching the videos several times to get a good understanding of the process and what's involved / required before diving into it. Makes the process so much smoother and easier.
Another very important thing to not is when you unplug the fan and led pin on the GPU, this can be real tight so just be really careful you don't pull the whole thing off the PCB.
aragorn18@reddit
That's awesome! I'm glad it worked out so well for you. Enjoy your "new" GPU.
gmc2000@reddit (OP)
Thank you man! I really appreciate that. Am just so happy it worked tremendously and I didn't brick my GPU. xD
ConsistencyWelder@reddit
One thing to note is that many new cards on the market now come with PTM7950 (or an equivalent) already pre-applied. So you might not want to repaste if that is the case.
pythonic_dude@reddit
And another thing is that became mainstream with rtx50 series, in which Nvidia decided to not expose the hotspot sensor to the user.