7900XTX Thermal pad size?

[TechPuppy]

Hello all! Am back! Have noticed temps getting somewhat higher than when I first got the card. They were in low 50s all the time with pl turned all the way up and now they usually sit around low 60s. While I know these temps are not an issue, they are about 10c hotter than when I first got the card about 3 months ago. What happens a year from now you know? I'd like to take care of them before they become an issue. Hotspot temp is usually 80c. Was wondering what the die size is, was thinking of getting one of those fancy thermal paste pads, the ptm7950 one to be exact, but I'm not sure what size to order or where to get a true Honeywell one cause I've seen some fakes going around as well. Also, what size is the normal pads that go on the memory and vrms and is there an upgrade I can buy for those that would help drop temps? Any help would be greatly appreciated!!

 

[Contra]

PTM can also dry out and be unstable. I would recommend kryosheet. Here on tpu was a good review and this comment is very helpful.
Each AIB will have its own gasket thickness, you will have to measure them or find a teardown review for your specific model, for example check the TPU database.

P.S. You have excellent chip and hotspot temperatures and I definitely don't recommend you to replace it at these temperatures. It's worth thinking about when the hotspot approaches 100°C.

 

[R-T-B]

PTM can also dry out and be unstable.

Takes a good 10 years but yeah, any paste eventually does.

I used a 40mm square pad IIRC. Worked fine.

 

[eidairaman1]

Get a set of metric gap gauges and messure the gap between the heatsink, die, ram, and vrms, then add .25- 1.0 mm to the gap for pressfit.

 

[TechPuppy]

Takes a good 10 years but yeah, any paste eventually does.

I used a 40mm square pad IIRC. Worked fine.

40mm x 40mm for your xtx? I'm sure every single die is the same but if it matters at all, my card specifically is the Merc310 Speedster one. I just want to have the pad here and ready that way my pc isn't down for a couple days because I ordered the wrong size lol

 

[R-T-B]

40mm x 40mm for your xtx? I'm sure every single die is the same but if it matters at all, my card specifically is the Merc310 Speedster one. I just want to have the pad here and ready that way my pc isn't down for a couple days because I ordered the wrong size lol

My card is the same model so good stuff. It's a bit too big but can be cut to size easily. You probably could get away with a 30mm square sheet but not certain about that.

This was my supplier, pricey shipping but absolutely genuine stuff:

Honeywell PTM7950 SP Super Highly Thermally Conductive PCM Pad

Buy Honeywell PTM7950 SP Super Highly Thermally Conductive PCM Pad for $5.99 with Free Shipping Worldwide (In Stock)

www.moddiy.com

I also redid the memory/vrm pads with some fujipoly pads but in my case they seemed fine and likely could've been given a pass.

 

[TechPuppy]

My card is the same model so good stuff. It's a bit too big but can be cut to size easily. You probably could get away with a 30mm square sheet but not certain about that.

This was my supplier, pricey shipping but absolutely genuine stuff:

Honeywell PTM7950 SP Super Highly Thermally Conductive PCM Pad

Buy Honeywell PTM7950 SP Super Highly Thermally Conductive PCM Pad for $5.99 with Free Shipping Worldwide (In Stock)

www.moddiy.com

I also redid the memory/vrm pads with some fujipoly pads but in my case they seemed fine and likely could've been given a pass.

Alright, pawsome. What was the size of the memory and vrm pads if I do decide to replace those as well or accidentally tear them in the teardown process? Any "performance" ones so to speak? Trying to squeeze every last drop out of this card I can.

 

[R-T-B]

Alright, pawsome. What was the size of the memory and vrm pads if I do decide to replace those as well or accidentally tear them in the teardown process? Any "performance" ones so to speak? Trying to squeeze every last drop out of this card I can.

I don't recall that sorry. I did know the thickness once but it left my brain long ago heh. Probably because I just bought some thermal putty and a huge pad and cut to size, I mean my eyes are ok for matching sizes but I'd hardly take measurements from them lol.

This board photo might prove useful if you can get the board dimensions though:

https://www.techpowerup.com/review/xfx-radeon-rx-7900-xtx-merc-310-oc/images/front_full.jpg

https://www.techpowerup.com/review/xfx-radeon-rx-7900-xtx-merc-310-oc/images/back_full.jpg

Fujipoly is pretty good in "normal" thermal pad performance, like for memory chips.

 

[TechPuppy]

I don't recall that sorry. I did know the thickness once but it left my brain long ago heh. Probably because I just bought some thermal putty and a huge pad and cut to size, I mean my eyes are ok for matching sizes but I'd hardly take measurements from them lol.

This board photo might prove useful if you can get the board dimensions though:

https://www.techpowerup.com/review/xfx-radeon-rx-7900-xtx-merc-310-oc/images/front_full.jpg

https://www.techpowerup.com/review/xfx-radeon-rx-7900-xtx-merc-310-oc/images/back_full.jpg

Fujipoly is pretty good in "normal" thermal pad performance, like for memory chips.

I may see if I can find some specs online, maybe on reddit or something lol, I'll see what I can find. One last thing, can you speak on this? Whether you'd trust this or not: Amazon.com: PTM7950 by CSGR 40x40x0.25mm Phase Change Thermal Pad – High Thermal Conductivity for CPU & GPU Cooling – Ideal for Use with K5 PRO Thermal Putty : Electronics I have amazon prime so it'd be a lot quicker getting to me then the one from moddiy.

 

[R-T-B]

I may see if I can find some specs online, maybe on reddit or something lol, I'll see what I can find. One last thing, can you speak on this? Whether you'd trust this or not: Amazon.com: PTM7950 by CSGR 40x40x0.25mm Phase Change Thermal Pad – High Thermal Conductivity for CPU & GPU Cooling – Ideal for Use with K5 PRO Thermal Putty : Electronics I have amazon prime so it'd be a lot quicker getting to me then the one from moddiy.

Yeah I have Amazon prime too so I was in a similar boat but decided not to gamble on those... I can say the thickness is the same as a genuine part though. The 0.2mm ones are automatic counterfeits (and ironically, even the counterfeit ones do ok, but obviously not preferable to the real deal).

If pressed to put a number to it, I'd say 8/10 potential for being genuine. To me it looks like someone repacked a big bulk order from honeywell, but never can be sure.

Armed with that info, you can make a pretty educated call.

 

[Contra]

Haha if you can't follow the link I'll paste this for you

There is a 25x25 size, no need to risk doing cuts. I've posted it in our 7900 Radeon thread last year.

The core idea must be excelled one more time. This thing ain't for records, but stability. It will never pump out. Put it and forget it.

Shame w1z didn't test PTM7958 also.

There are soft tweezers for the task. Also you can hook up thermal shrink tube to any tweezers and make it as a gentle pick up tool. Be creative.

Pro tip is to use a bit larger and put some small thermal paste dots in the substrate corners, so it sticks while you align the heatsink on.