I never saw a 5-10C difference in any popular grease. I do have both and used both with the Optimus CPU block and didn't see any difference at idle cpu.
I have switched to “Grizzly” (forgot the full name) and I saw a 1 C difference to the good.

 

I have always thought for the most part the differences between pastes were within the margin of error of properly applying and getting good contact.

 

Review : Arctic MX-6 Thermal paste - Page 4 of 5 - Overclocking.com EN

Test / Review of the MX-6 thermal paste from Arctic. A high performance thermal paste worthy successor to the MX-4.

en.overclocking.com

 

I was wondering if anyone has comparison of mx4 and mx6.

I installed a CPU yesterday and I had to use my MX-4. A couple hours later the MX-6 arrived and I'm certainly not in the mood fo reapply paste if it's not going to be a 5-10C improvement.

The MX-4 I used on my last application was still wet and creamy (🥵🥵🥵) and I installed that in 2019. Before I had used Arctic Silver 5, which dries out, and OCZ Freeze, which went out of business... RIP OCZ

anyone got graphs

dont worry about it, when new applied they are all within 1-3 degrees from each other ( your application method plays big role too, if you apply too little, your temps will be higher, and temps spikes bigger ), what matters is, how long they remain wet, usually big heat dries pastes out, over prolonged periodes of time. as long ur paste is wet, no need to change it. I had mx-6 and mx-4, didnt notice any differences tbh, afterwards i switched to thermal grizzly for sake of testing it, their paste is more dense and not so much wet as mx-4 or mx-6 and in my case i could change it once in 3-4 years if i wanted to, however when changing my luube, i take blocks apart to clean em, and if you do that, then you kinda have to put new one.

this spread method with grizzly worked best for me. cpu temps between cores are 1-2c diff from each other. cpu is delided too and under the ihs is again grizzly, i feel like i lapped the sucker but didnt.

 

Thanks, that makes sense. I put a lot of paste on there, a real jumbo pea size... American Pea?? In the middle and so far it's what i expect. The CPU i got has soldered IHS and it's the first cpu I have had with soldered down IHS.

I'll save the MX-6 for my GPU, i gotta figure out what to do with my 3080 FTW3 because it runs at 91C ever since my new CPU released the bottleneck LOL

 

I'm not a fan of Thermal Grizzly Kryonaut. The one tube I bought a few years ago was expensive for how much you get, and while it performed well when new, after 6 months temps were shooting up and definitely by a year it needed repasting. They have new formulas now I think, but I still just find their stuff expensive for what it is.

I've found MX-4 and NT-H1 to stay effective for longer before needing repasting. And honestly between all high performance thermal pastes I don't think you are looking at that much of a difference in performance, and its more about how long it lasts, if you get pump-out effect, etc.

I just finished up a tube of MX-5 myself, got it before they discontinued it, and it seems to perform fine, but I did notice this pump-out effect when I repasted my CPU block recently after it had been in use for only a few months. I'll probably go back to MX-4, or try this new MX-6, or maybe some GC Extreme.

EDIT: And yeah, RIP OCZ. I used to use OCZ Freeze too back in the day OP.

 

I'm not a fan of Thermal Grizzly Kryonaut. The one tube I bought a few years ago was expensive for how much you get, and while it performed well when new, after 6 months temps were shooting up and definitely by a year it needed repasting. They have new formulas now I think, but I still just find their stuff expensive for what it is.

I just repasted my GPU because I had to replace a fan and figured "why not repaste while we're taking things apart?" Last re-paste was about a year ago with regular Kryonaut but it looked like new. Maybe I got lucky with a good batch of it, but I've never had the stuff dry out on me. This re-paste was done with Kryonaut Extreme, and I also got a tube of KPx recently, which I used on my CPU. We'll see which one outlasts the other in about a year.

 

I've never had an issue using too much paste. Squirt half a tube on the CPU and wrench down the cooler so it leaks out the sides like you're crushing an Oreo. Doesn't really matter unless it's conductive. You hurt temperatures by like 2 degrees tops, which is way less than you get by not using enough.

 

Like my man above said, it's not really about which paste is better as they all perform similarly more or less, but how long it lasts. Kryonaut stuff pumps out within 3 months on warm graphics cards. I personally find thicker aka less watery pastes better to use in general. MX-4 is ok on heatspreders, but pumps out quick on bare dies.

 

Kryonaut stuff pumps out within 3 months on warm graphics cards.

That's the old gray one, not the new improved pink Extreme one, just so nobody gets confused, gets the wrong impression.

 

regarding the thermal aste application, I used the 'rice grain size' in the middle for so long. It never spreads to the corners when you do so.

I've now started using a line down the longer length of the CPU instead and the spread comes out much better.

Any method you use, not covering the whole IHS is worse than covering it all.

 

I was wondering if anyone has comparison of mx4 and mx6.

I installed a CPU yesterday and I had to use my MX-4. A couple hours later the MX-6 arrived and I'm certainly not in the mood fo reapply paste if it's not going to be a 5-10C improvement.

The MX-4 I used on my last application was still wet and creamy (🥵🥵🥵) and I installed that in 2019. Before I had used Arctic Silver 5, which dries out, and OCZ Freeze, which went out of business... RIP OCZ

anyone got graphs

Tom's Hardware did another review. New Graphs included with old graphs at the bottom. Best Thermal Paste for CPUs 2022: 90 Pastes Tested, Ranked | Tom's Hardware (tomshardware.com)

 

Noctua NT-H2 works for me.

 

Haven't tried NT-H2, but I liked NT-H1 plenty fine too.

 

I have become a fanboy for Noctua lol.

 

Another vote for NT-H2. I've been using it for a while and it holds up well. I tend to go a little heavier than the rice grain standard, but it's still a fairly thin layer. I just make sure I've got even 100% coverage.

NT-H2 doesn't pump out from the sides much, it's fairly thick at room temp. When I took apart my system after a few years running it looked about the same as when I applied it.

 

Got the mx6. Very thick and not easy to spread.