Dabadger84
So here's an update, got the new heatsinks in, haven't had a chance to game on them yet, will be doing that shortly, but they seem to be pretty good stuff.  They're light, but the base is fairly thin, so that makes sense.  I scratched one with a screw driver just to make sure they're real aluminum - pretty sure they are:
 

Why not just do a big one?  seems like you could get a 1" tall heatsink maybe 100mm x 140mm.  I think with more surface area it might be better cooling.  I did find that 1000rpm was the best for noise myself. 
 
I can't tell with my back plate if the tiny heatsinks (4mm  high) has done anything... it might just be the effects of the fan I have blowing at it.  couple degrees lower... but seems marginal.

MiztahSparklez

Dabadger84
So here's an update, got the new heatsinks in, haven't had a chance to game on them yet, will be doing that shortly, but they seem to be pretty good stuff.  They're light, but the base is fairly thin, so that makes sense.  I scratched one with a screw driver just to make sure they're real aluminum - pretty sure they are:
 

Why not just do a big one?  seems like you could get a 1" tall heatsink maybe 100mm x 140mm.  I think with more surface area it might be better cooling.  I did find that 1000rpm was the best for noise myself. 
 
I can't tell with my back plate if the tiny heatsinks (4mm  high) has done anything... it might just be the effects of the fan I have blowing at it.  couple degrees lower... but seems marginal.

Trying to keep the obstruction to a minimum where it can be minimized, only putting them in the areas where there's actually something on the other side of the backplate to transfer heat from, using this as a guide, the ones at the "top" and "bottom" on my picture are over the VRM areas (that are obviously NOT on the back of the card, and I'm unsure if there's thermal pads there either):
 

Note, the VRM boxes I made are a little off, but close enough:

 
I'm fixing to run Cyberpunk for a bit & see how the temps shake out with an ambient that's fairly controlled, between 70-71F.

So I redid some of them position wise, and included a heatsink over one VRM area I missed, indicated in this:
 

 
And now, all of my temps are lower than before the heatsinks, with a higher overclock than the pre-heatsinks temps I have a record of.
 

 
Left is with no heatsinks, right is with the latest setup of heatsinks. Crazy that the one iCX Mem temp dropped over 11C.  

Does anyone know the thermal pad thickness on the backside areas?  Trying to figure out what size to order to put in the areas of the backside of the PCB that are where the VRMs & GPU die are because I know there aren't thermal pads there stock, only on the vRAM from what I understand.
Has anyone taken their backplate off & bothered to measure those pads?  I'm figuring I'll need about .5mm thicker than the ones on the vRAM chiplets, does that sound about right?

Dabadger84
 
Trying to keep the obstruction to a minimum where it can be minimized, only putting them in the areas where there's actually something on the other side of the backplate to transfer heat from, using this as a guide, the ones at the "top" and "bottom" on my picture are over the VRM areas (that are obviously NOT on the back of the card, and I'm unsure if there's thermal pads there either):
 
I'm fixing to run Cyberpunk for a bit & see how the temps shake out with an ambient that's fairly controlled, between 70-71F.

I'm debating whether or not I want to stick thermal pads under the vrm areas with a heatsink on the back plate..  all of this adds up substantially in cost... lol  I'm hoping KPE cards start shipping soon.  I'd honestly be happy with about a 2100mhz clock, as i'm boosting 2000-2050 with my Hybrid, giving me 100+ fps on a CRG9 monitor.  Since this monitor doesn't go above 120hz anyway, I'm just trying to maximize the current capabilities.

MiztahSparklez

Dabadger84
 
Trying to keep the obstruction to a minimum where it can be minimized, only putting them in the areas where there's actually something on the other side of the backplate to transfer heat from, using this as a guide, the ones at the "top" and "bottom" on my picture are over the VRM areas (that are obviously NOT on the back of the card, and I'm unsure if there's thermal pads there either):
 
I'm fixing to run Cyberpunk for a bit & see how the temps shake out with an ambient that's fairly controlled, between 70-71F.

I'm debating whether or not I want to stick thermal pads under the vrm areas with a heatsink on the back plate..  all of this adds up substantially in cost... lol  I'm hoping KPE cards start shipping soon.  I'd honestly be happy with about a 2100mhz clock, as i'm boosting 2000-2050 with my Hybrid, giving me 100+ fps on a CRG9 monitor.  Since this monitor doesn't go above 120hz anyway, I'm just trying to maximize the current capabilities.

I mean in my case it's less than $40 for heatsinks, and probably something around $20 for thermal pads, isn't that bad compared to the cost of the card, and given just the heatsinks are dropping temperatures as much as they are for me, when my temps were already pretty great (because of my airflow to begin with) - I'd say it's worth the investment.

tigerlord
That is good news, they should come out before March 2021 then.
I hope so as I on the unofficial list 26 now  as all the rest of the parts for my new computer are just gathering dust from last year. such as my kingpin mother board 

Dabadger84

MiztahSparklez

Dabadger84
 
Trying to keep the obstruction to a minimum where it can be minimized, only putting them in the areas where there's actually something on the other side of the backplate to transfer heat from, using this as a guide, the ones at the "top" and "bottom" on my picture are over the VRM areas (that are obviously NOT on the back of the card, and I'm unsure if there's thermal pads there either):
 
I'm fixing to run Cyberpunk for a bit & see how the temps shake out with an ambient that's fairly controlled, between 70-71F.

I'm debating whether or not I want to stick thermal pads under the vrm areas with a heatsink on the back plate..  all of this adds up substantially in cost... lol  I'm hoping KPE cards start shipping soon.  I'd honestly be happy with about a 2100mhz clock, as i'm boosting 2000-2050 with my Hybrid, giving me 100+ fps on a CRG9 monitor.  Since this monitor doesn't go above 120hz anyway, I'm just trying to maximize the current capabilities.

I mean in my case it's less than $40 for heatsinks, and probably something around $20 for thermal pads, isn't that bad compared to the cost of the card, and given just the heatsinks are dropping temperatures as much as they are for me, when my temps were already pretty great (because of my airflow to begin with) - I'd say it's worth the investment.

Did you replace the thermal material on the heatsinks or leave them as they came? I need a few odds and ends from ppcs and may try a pack or two out while I wait for the water block. Jacob said hopefully end of the month they'll be up. Fingers crossed it's not another auto-notify with no actual date in mind. When I do that I'll actually put nice thermal pads on, I used alphacool 11W/mk on my XI hero monoblock which went well so I plan to use a mix of 11 and 17 on the kingpin.

alpharius194
 
Did you replace the thermal material on the heatsinks or leave them as they came? I need a few odds and ends from ppcs and may try a pack or two out while I wait for the water block. Jacob said hopefully end of the month they'll be up. Fingers crossed it's not another auto-notify with no actual date in mind. When I do that I'll actually put nice thermal pads on, I used alphacool 11W/mk on my XI hero monoblock which went well so I plan to use a mix of 11 and 17 on the kingpin.

I just ran them with the thermal tape that came on them.  I might replace it later, but it seems to work pretty well.  At one point testing with the side of my case off I grounded myself then touched one of the heatsinks that isn't covered completely by the fan (still has air blowing through it) while in game, it was pretty warm so they're definitely doing somethin' ^_^ not too warm to touch though.

I'm assuming you used aluminum over copper so that it does not interact with the backplate? Or just personal preference? PPCS has a bunch of both materials in quite a few styles.