Liquid Ultra vs Liquid Pro?

I'm having some trouble deciding between these two compounds. From what I gather, Liquid ultra gives better idle/inactive temperatures while liquid bro gives better load temperatures. Does anybody have first hand experience comparing the two?

 

So basically Liquid Ultra can replace my A/C in summer?

 

For clarification, CLU seems to give lower CPU temperature during idle/inactivity vs Liquid Pro which seems to give lower temperatures under stress/load.

 

Oh so you meant idle not ambient temperature. Gotcha.

 

but i hear that the metal thermal paste is danger for the cpu or gpu if you dont apply it right ?

 

Supposedly, but I have not had that problem. You have to be really sloppy/lazy to apply it wrong. I have it liquid ultra on my father's Alienware 17 (i7-4710HQ), my X220 Tablet (i5-2520M), and I had it on my M18x R2 (i7-3920XM) before I foolishly reverted to IC diamond and paid the price. I get 88 deg with ICD versus the 79-82 I used to get with liquid ultra, so it is safe to say I will be going back to liquid ultra or liquid pro. When/if my Alienware 18 gets here, I will definitely be using either liquid ultra or liquid pro on the 4930MX and the GTX 780Ms

 

Is it true that when reapplying liquid ultra on either cpu or gpu after it was applied previously, the heatsinks need to be sanded and resurfaced. Anyone have any experience with doing this?


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Stay with Liquid ultra. Liquid pro is worse to take off and also not as easy to apply like liquid ultra.

 

The test results I have seen do not show a meaningful difference in load temps (like 1 or 2°C difference) between Pro and Ultra, but as @Papusan stated, everyone that has used both has stated that Liquid Pro is much more difficult to clean up. Apparently, it gets much harder. I have never used Liquid Pro, so I don't have any first-hand experience that I can share.

An M18xR2 that I just repaired for an acquaintance had Liquid Ultra that I applied in November. I changed the motherboard out a month ago. The Liquid Ultra was still totally liquid. I did not have any more Liquid Ultra on hand at the time. I used the brush they provide with the kit and re-spread what was already there across the die and heat sink and the load temps on that machine are exactly the same as before. That's pretty amazing. I benched the crap out of the CPU for several days and it held up fine using the old paste, so now I'm not even going to bother re-pasting it.

 

So it's safe to say to go with liquid ultra

To those who have used liquid ultra, does it last a long time even with constant 80-85C cpu temps? I'm looking into replacing my IC Diamond since it doesn't seem to last more than a few months.

 

Yes, it lasts a long time. @Papusan applied his over a year ago and no signs of degradation. I keep taking my M18xR2 apart for different experiments, but I've got almost a year on the Liquid Ultra applied to the 4930MX in the AW18 and it runs as cool as the day I applied it. I've got IC Diamond on the P570WM because the heat sink fit is too sloppy to use Liquid Ultra.

 

I have used Liquid ultra now nearly 1.5 year. Same temperature on my i7-4930mx as 10 February 2014. Zero change. Why use an other paste ? Ic7 or Gelid extreme can't compete. I'll newer go back to an other paste. Never...

 

Not sure if still relevant but i would strongly advise against using liquid pro. At the first glance, it seemed to give me amazing results (71 max temp in XTU, x40). However, a few months later, i had temp issues again. I opened up my laptop and saw that liquid pro turned into a dust on the surface of my GPUs and CPU. Moreover, it was a pain to get it off the heatsinks. I had to use that metal scrapper which came with the paste.

 

Yep, with with liquid ultra this time. Idle temp are still high, but load temps at 42x4 are only 73 C vs the 88 it was with ICD.