Hey guys,

this weekend we collected some new knowledge about the Problem what I posted some time ago with the Heatspreader less cards.

We ordered different compound do see if there is some difference between them espacially in use without Heatspreader.
After SF3D's post about his experience with HS-less Cards we had some hope that our good cards what no more have a HS can run like before

Compound what we tested:

Arctic Cooling MX2
OCZ Freeze
Prolimatech PK1
Coollaboratory Liquid Ultra

at first MX2 is crap at all, long time we used this Compound and we never had problems with it, BUT compared to others it's the worst, coz even with Heatspreader a Card with MX2 could run maybe 70 to 100 MHz lower coz of temperature caused issues.

All of the conventionell Compounds aren't able to solve the HS-less Cards Problems

OCZ Freeze is/was our favorite for LN2 GFX... but it's hard to get it and without Heatspreader it was not able to allow clocks above 1300 MHz.

Prolimatech PK1 is quite similar to OCZ Freeze, unfortinatly we had just a little bit of the Freeze left and so we can't compare Freeze and PK1 directly, but clockrates on HS-less cards are the same 1300 and no more...

Coollaboratory Liquid Ultra is Liquid Metal, highly conductive and you have to be very very careful to short no circuit on the Card, but the good is, the Liquid Ultra has a Heat Transfer value wich is 10x higher then usual compound.
With this you have a Metal connection between GPU Core and Pot's Base. We where able to run 1450 MHz with this, AND it was quite impossible to push temperatures down during a run, even without so much voltage.
This means 150 MHz more and no more limiting by Grey screens like before (without HS and with usual compound)

but, the Liquid Ultra is just a realy thin film on the GPU core, it is not made for filling up uneven edges and it is hard to mout the Pot right, coz if you have to much pressure and the card is bending the Liquid Ultra will not have perfect contact on every edge of the GPU core.

Another unfortunat point is that you need to heat your Pot up to positive values until you can release it, coz the Liquid Metal become hard on sub Zero.
And it is a dirty work to remove the Liquid Metal... on the GPU core it is ok, but on the Pot you need to polish the Base to remove all the rest of the Liquid Metal.

But for now we know that the problem with Heatspreader less cards is realy a temperature issue.

The compound on the GPU Core can't transfer the Heat fast enoght and so the GPU overheats.