Redteamtango,
Nice work documenting the difference.  Looks like you have the solution you have been looking for in reducing the VRM temps and that powerstage 5 temp too.  Just to make sure those temps are in celcius right?  If so, the drops in temperature are pretty good.  You should feel good about the impact the changes made.  May not win any appearance awards with the velcro straps, but the performance looks very solid.  To me, I would also prefer the results you are getting rather than the appearance of a couple of velcro straps you might be hard pressed to see once your case is closed up and side glass in.  
 
The choice for you to add the MP5 backplate looks like the right decision.  Well worth the cost and time to add it to your loop from these early results.  
 
Now enjoy your pc and make some runs on it to see how much your scores will improve with the reduced temperatures.  

Gotspeed, thanks for the feedback.  That is correct!  Temps are in Celsius.
 
But yeah lol those straps aren't pretty but they get the job done.  The block sits pretty tight to the backplate with very little play.  Unfortunately, the 6mm clips were too small.  I should have just bought them all.  I didn't want to clamp the cooler to the GPU either as the MP5works block has some curve to it and its only plastic... so I went with the straps.  They are easy to adjust and its just temporary .  I have some bigger clips coming so that should improve the appearance once in place.
 
The thing that really surprised me is that the GPU hotspot just kind of sits around 68-70C under 100% load without any overclock.  But then if I pop on a +100core/+1000mem, its still 70-72.  So that GPU Hotspot temperature vs GPU Temperature delta is really a headscratcher for me.  I have remounted the block 7 times at this point, have a full coverage backplate thermal pad and tried every kind of name brand thermal pad for the front (Gelid ultimate, gelid extreme, Thermalright, EVGA, optimus (fujiopoly), and I really just haven't gotten there.  So in that respect, I'm kind of at a loss.. but like you said it might just be a silicon lottery thing.  End of day, the card is still a rockstar so I can't complain too much

Just got my Kingpin a few weeks ago and after I broke her in, the card has been performing great. It's amazing the mods the people in this forum have done and has me reading through all the 44 pages. My kingpin from the second I turned it on started making this fridge like noise, after a few days the noise has disappeared and I'm guessing the air bubbles have subsided from the AIO. I'm incredibly interested in some of the mods I've seen in this topic so far or even repad work to get my temps down. 

The 9th and final remount.  I outlined in white where you can see the nubs of the mp5works clips once the card is mounted back into the system.  I did end up removing the NVlink cap to get the top PCI backplate block clip a bit easier to get in place.  I might notch the NVlink cap at some point but right now, i'm indifferent.  I'm tapping out now, I'm satisfied and this probably isn't going to get much better than it is. 
 
If I were starting from scratch here is what I'd get:
 
* 2mm Thermalright odyssey pads for hydrocopper front
* 3mm Optimus full coverage pad for back
* 3mm Thermalright odyssey for inside of VRM area
* KPX thermal paste
* mp5works parallel block with 4 x 8mm clips
 
Avoid Gelid pads imo.  They are very hard and do not compress well at all.  Good luck peeps.  Below is where its at with this final remount.
 
 
 
 
PR 20x temperature highlights in C
Coolant: 30C
GPU1: 47.8C
GPU1 / Coolant Delta: +18C
GPU1 / GPU2 Delta: +1-2C
GPU Hotspot / GPU Memory Junction Delta : +3-5C
GPU Hotspot / GPU1 Delta : +15C
 
 
back:
3mm optimus thermal backplate
mp5works parallel block
4 x 8mm clips mounting the block
0.5mm pad from Mp5works block
 
front:
KPX thermal paste, finger spread evenly (not shown,sorry)
Thermalright 2mm on memory and VRM (VRM not shown, sorry.  Mounted directly to block)
Gelid ultimate 1.5mm x 2 stacked (3mm total) on area inside VRM
 


 


 

 

 

Redteamgo, Good write up, thanks
So, with the HC block on are the 8mm Clips catching the PCB? , I know there is no place for clips with the AIO shroud and I was not keen on grinding a spot out for them to fit like the other poster ,  I do have a HC block in my closet, 

Yes, the 8mm clips catch the PCB.  no other way to do it AFAIK
 
you can either notch the backplate, loosen the backplate so that the hooks catch, or keep the backplate flush and use the big clips that will hit the PCB

that gpu backplate looks sick

should have my mp5works BPC here tomorrow

Hello All, 
I want to put new thermal pads on my Kingpin Hybrid 3090. 
Can you please help me with recommended thermal pad thickness for the front and back of the card? 
 
I will be keeping the stock cooler for now, but will eventually move to the Optimus KPE waterblock. 
 
From previous posts This is what I think the answer is:
 
FRONT:
VRAM: 2mm
VRM: 3mm???  
 
BACK:
VRAM: 2mm?
BACLK of GPU: ?
Anything else?
 
Thank you all!
 

The 3090 Kingpin is pretty old now.. but wanted to update my latest changes.
 
I've replaced the thermal pads for vram and GPU coolers with honeywell phase change material (similar to what is being used in gaming laptops and the new 4090 FE cards).  I am using this in place of thermal paste.  Copper shims are being used instead of pads.  Initially, the temperatures were unimpressive, but now they are great!  It really does take some time for the phase change material to do its thing.
 
VRMs now are using Arctic TP-3 pads.  Much cheaper than Gelid and seem like they perform quite well.
 
Rear got the same treatment with Arctic TP3 pads and Honeywell phase change material + copper shims.  Added bonus: Heatpipe based heatsink instead of having a ton of fans and tiny heatsinks on the back of the card, I now have a 90 degree bend that removes heat from the back of the card with a large thermal pad via heat pipes, to an external heatsink that my case fan blows onto.
 
Temps under load/Idle:
https://imgur.com/a/whPzps2
 
Inside case:
https://imgur.com/8FIcycs
 
Outside case:
https://imgur.com/VK1n2GN
 
Overall, I'm happy with the temperatures.  Unfortunately, I must have not won the silicon lottery, as I am unable to do any significant overclocking without crashing/issues.