Discussion Thermal Grizzly KryoSheet (graphene cooling pad)

[bit_user]

I'm about to build a new machine and I'm wondering how Thermal Grizzly's new graphene-based KryoSheet compares to conventional thermal compound. They claim it's a much better implementation than other graphene-based cooling pads, since they oriented the crystal lattice so the direction of maximum heat conduction is perpendicular to the plane of the cooling pad.

Is anyone aware of any reviews? It's a new product, and I haven't seen any.

You can translate the product page by entering the URL into Google Translate:

https://www.caseking.de/en/thermal-...tpad-38-x-38-mm-zuwa-281.html?tplview=desktop
​

 

[Aeacus]

It's a new product, and I haven't seen any.

Graphite/graphene pads have been around for a long time.

GamersNexus (2 years ago):

View: https://www.youtube.com/watch?v=niAQs8dZohE


LTT (also 2 years ago):

View: https://www.youtube.com/watch?v=ipFhGlt8Qkw


Thermal Grizzly doesn't say the actual W/m*K rating of their graphite pad. Instead, they give a vague 5 star rating,
specs page: https://www.thermal-grizzly.com/en/products/625-kryosheet-en

Still, even if you go with high W/m*K rating, e.g 1950 W/m*K like the Panasonic pad LTT tested, issue is still with filling the microscopic cracks in IHS and coldplate. Due to that, graphite pads, usually, have worse cooling effect than normal thermal paste, despite their high thermal conductivity of Watts per meter Kelvin.

Found recent reddit topic about this very question as well,
link: https://www.reddit.com/r/overclocki...ryosheet_vs_thermal_paste_in_gpu_application/

 

[bit_user]

Graphite/graphene pads have been around for a long time.

So I've heard. That's why I mentioned how Thermal Grizzly thinks they've solved the problem with prior attempts.

even if you go with high W/m*K rating, e.g 1950 W/m*K like the Panasonic pad LTT tested, issue is still with filling the microscopic cracks in IHS and coldplate.

I've lapped heatsinks and even an IHS.

Currently, I'm doing a direct-die cooling, but the harsh warnings about KryoSheet's conductivity scared me away from using it for that. If it doesn't stay put while I'm lowering the heatsink onto it, then it could very easily hit some of the surface-mount components next to the die, and I wouldn't be able to see that it hadn't stayed put.

Anyway, that's why I thought to ask about it for my next build.

 

[dwd999]

I'm about to build a new machine and I'm wondering how Thermal Grizzly's new graphene-based KryoSheet compares to conventional thermal compound. They claim it's a much better implementation than other graphene-based cooling pads, since they oriented the crystal lattice so the direction of maximum heat conduction is perpendicular to the plane of the cooling pad.

Is anyone aware of any reviews? It's a new product, and I haven't seen any.

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IDK its electrically conductive so sizing and placement would be critical. And it doesn't seem to offer any higher performance than Kryonaut Extreme (they themselves rate both 5 stars), which is not electrically conductive. So I don't think I would risk an electrically conductive product just for the sake of neatness. (I used Kryonaut Extreme on my most recent build).

 

[bit_user]

I don't think I would risk an electrically conductive product just for the sake of neatness.

It's not just for neatness. They highlight its longevity, since it can't dry out or get "pumped" out (i.e. through repeated heating & cooling), like some pastes.

I have no concerns about conductivity, when used in a place where I can visually see that it hasn't moved from where it's supposed to be. I think conductivity is mainly an issue for direct-die cooling.

 

[Aeacus]

Anyway, that's why I thought to ask about it for my next build.

Not much is known about KryoSheet (that much is also said in reddit thread).

If electrical conductivity is a problem (e.g direct die cooling), then use regular thermal paste.
Or if you want to risk it, you could try the KryoSheet and look how it fares.

Is anyone aware of any reviews?

At 14:48 is preview of KryoSheet, marketed by Roman "der8auer" Hartung;

View: https://www.youtube.com/watch?v=qKFYawQOKJo

 

[bit_user]

At 14:48 is preview of KryoSheet, marketed by Roman "der8auer" Hartung;

View: https://www.youtube.com/watch?v=qKFYawQOKJo

That's where I first heard about it. Since I see they now have it for sale, I was wondering if there are any independent comparisons available.

 

[Aeacus]

Either wait for couple of months to see if anyone would post a review about it, or be one of the first guinea pigs to test it out.