Coollaboratory Liquid Ultra vs Liquid Pro

I've been unable to find a comparison between these two compounds so I thought I'd compare them myself. I've had it confirmed by the CEO of Coollaboratory that Liquid Ultra is rated at 38.4w/mk and Liquid Pro is rated at 32.6w/mk.



System
CPU: Intel 3770K @ 4.7GHz 1.224v (de-lidded)
Mainboard: ASUS Maximus V Formula
Cooler: Corsair H100 (2x Corsair SP120/2x Scyte Ultra Kaze 3000)
Memory: 2x4GB Crucial Ballistix Tracer @ 2000MHz
SSD: Crucial M4 128GB
Graphics:Sapphire 7950
Case: Corsair 800D
Operating System:Windows 8 Pro x64

The case is very well cooled. There are a total of 9 case fans all intake. The H100 exhausts out the top.

I have a temp sensor measuring the room temperature. Attached to it is a sensor which is inside the case, next to the mainboard. There are 4 more temperature sensors attached to the fan controller at various points inside the case. The case temperature was recorded at the start, after 15 minutes, after 30 minutes, after 45 minutes and at the end of the testing. The average was then used.

I used the latest version of Aida64 running "Stress FPU" for 1 hour. FPU stressing means AIDA64 System Stability Test will use a floating-point calculation task that stresses the FPU part of your processor. Modern processors all have an integrated FPU, and from all the components that are integrated, the FPU is the most complex one. Hence stressing only the FPU actually stresses most of your processor, and usually drives the processor to its maximum temperature. The average core temperature is recorded by Aida64.

The compound was painted on the die, on both sides of the IHS and on the base of the H100. Each compound was applied, tested then re-applied and tested again. The best results were posted



Liquid Ultra


Liquid Pro




Liquid Ultra has a delta temp of 3.1c lower than Liquid Pro in my system

3770K @ 5GHz 1.416v

Liquid Pro


Liquid Ultra




This time Liquid Pro was 1.71c cooler than Ultra.

If we use a +/- 2c margin of error there is nothing separating these two compounds. Liquid Ultra is better to work with. I wouldn't use the cotton tips that are supplied with Liquid Pro because I found more compound stayed on the cotton than on the IHS. Also there is the risk of cotton fibers sticking to the die or IHS which would impact temps. I used the brush that is supplied with Liquid Ultra which makes the application very easy.

Cleaning is another issue. Liquid Ultra simply wipes off but Liquid Pro often forms tiny balls which when accidentally smeared leaves quite a big mess. I had the stuff all over my fingers by the time I finished wiping it off.

If you are using one or the other than stick with it. There is nothing to gain by switching.
Edited by tw33k - 1/24/13 at 3:18am

I only have 1 lot of each so I tested both of them twice and posted the best result.

Thanks guys.

It would be good if those people who claim to have used both posted their results. It's not good enough to simply say "I found Pro performed better" Post proof otherwise it appears you're not being truthful