10900k temps and core to core delta

[steverebo]

so I decided to grab a 10900k for my new build judge all you want

Im busy playing with it and have found it very good for overclocking but at 1.345V 5.2ghz all cores if I run prime 95 avx small fit's it hits over 100 degrees instantly. Anyone else with one of these experiencing this just want to know its normal and not my waterblock mount???

Also I've noticed a core to core delta of a whopping 20 degrees

Is this normal?

Just want to judge my experience against someone else to make sure everything is normal and I've not got any loop issues

Running Aida64 cpu, FPU, cache stress test 1 hr with Valley in background
Cpu package 93 degrees, core temps 74 74 78 76 86 93 89 80 81 73

Running 3 x 360 rads in a lian li 011 dynamic xl D5 pump

 

[tinytomlogan]

For a start thats a LOT of volts for a 10900K

Also AVX is probably not the best way to test and Id say those temps with your settings are normal

 

[steverebo]

Cheers Tom, I thought I was being Conservative with Volts

I could easily dial it down to 1.32/1.33 which was perfectly stable for hours on anything other than prime 95 small fft's which caused L0 cache errors instantly

 

[WYP]

You may need to use an AVX offset clock speed. Basically you can get the CPU to lower the clock speeds when AVX is active by 200 or so MHz to make things more stable.

AVX is a huge power hog on Intel CPUs.

 

[steverebo]

I dont like using an offset as a lot of games nowadays use avx instructions so might as well run at the most stable avx clock I can get this cpu non avx stable at 5.3 no problem at these voltages.

The thing that threw me was watching a few videos of people running 1.45v 5.1ghz avx on a single 360 rad and getting lower temps in prime 95 I cant even run prime 95 without hitting 108 degrees at over a 1 volt less

Stablity wise I've done 12hrs occt non avx, 2hrs aida64 with valley running in the background no errors

 

[Avet]

It is called a silicon lottery for a reason. Der8auer dropped on average 7-8 degrees by delidding the CPU. He will soon have a direct die mount. You might want to check that. Buildzoid recommended going Liquid Metal between IHS and CPU block instead of thermal paste if you want the best results. I would recommend at least Thermal Grizzly Kryonaut and don't put a pea-sized dot in the middle. Do a proper spread all over IHS like pro overclockers do when they mount pots. If you want to get balls to the wall with that CPU every bit matters.

 

[steverebo]

Does liquid metal on the IHS void warranty? I've got some thermal grizzly liquid metal lying around. Already used kryonaught and spead it thinly over the IHS for full cover

 

[Avet]

Does liquid metal on the IHS void warranty? I've got some thermal grizzly liquid metal lying around. Already used kryonaught and spead it thinly over the IHS for full cover

Yes because it will smudge the writings on IHS. You need them to be readable to get the warranty.

 

[Warchild]

It is called a silicon lottery for a reason. Der8auer dropped on average 7-8 degrees by delidding the CPU. He will soon have a direct die mount. You might want to check that. Buildzoid recommended going Liquid Metal between IHS and CPU block instead of thermal paste if you want the best results. I would recommend at least Thermal Grizzly Kryonaut and don't put a pea-sized dot in the middle. Do a proper spread all over IHS like pro overclockers do when they mount pots. If you want to get balls to the wall with that CPU every bit matters.

HE delidded with special techniques though. Not something you can typically do at home given the CPU is soldered.

 

[steverebo]

I did it to my 9700k its pretty easy but that chip cost me £250 im not really willing to risk my £530 chip.

Im gonna try to remount my cpu block and re-apply my thermal paste see if that makes any difference especially to the core to core delta as 20 degrees difference is ridiculous

 

[Avet]

HE delidded with special techniques though. Not something you can typically do at home given the CPU is soldered.

You can do it with any delid tool. And also there is solder removal kit. RockItCool

 

[Warchild]

You can do it with any delid tool. And also there is solder removal kit. RockItCool

wow I wasnt aware. Considering how I saw him baking the CPU to melt the solder etc I didnt think it was that simple to create a delidding tool kit for it.

I stand corrected

 

[Avet]

wow I wasnt aware. Considering how I saw him baking the CPU to melt the solder etc I didnt think it was that simple to create a delidding tool kit for it.

I stand corrected

Soldered X299 and Ryzen CPUs should be baked before delidding. There are many SMDs on them so you risk pulling something off when applying the force needed. Mainstream Intel has no SMDs around the die. You just yank it from both sides and it is off.

I would apply the solder removal kit a couple of times to remove Indium rather than scrape it with a razor. Also if you go through all that trouble to delid go all the way and do a direct die mount.

Edit: I did a direct die mount to my friend's 9700K. It was really easy with the tools. It did drop temps ~10 degrees and core to core deltas were much lower. Sadly he got a dud. It wouldn't do more than 4.9 on all cores not for love nor money.

 

[looz]

I'd just dial it down, 100MHz is just a 1.9% of 5.2GHz. Maybe tune cache ratio to offset the drop in performance.

 

[AlienALX]

Sad reality. Intel binning and sending top SKUs to reviewers.

But yeah, don't use liquid metal man. It will eat into the alu, and possibly fuse itself to your cooler.

 

[steverebo]

Ok guys so I thought YOLO and went for it and I delidded my 10900k and applied liquid metal and what a differnece!!!!!!

Same test as before aida64 with valley in the background my temps are now average:
Cpu package 76 core temps 65 65 68 67 68 70 66 68 62 64

Previous

Cpu package 93 core temps 74 74 78 76 86 93 89 80 81 73
No more core to core delta and roughly a 20 degree improvement in temps!!!!!

This is without letting my liquid metal and kryonaught cure so temps should improve further

 

[AlienALX]

Awesome. You're brave lol.

 

[WYP]

Ok guys so I thought YOLO and went for it and I delidded my 10900k and applied liquid metal and what a differnece!!!!!!

Same test as before aida64 with valley in the background my temps are now average:
Cpu package 76 core temps 65 65 68 67 68 70 66 68 62 64

Previous

Cpu package 93 core temps 74 74 78 76 86 93 89 80 81 73
No more core to core delta and roughly a 20 degree improvement in temps!!!!!

You're a brave lad. I wouldn't have risked that, but well done for getting that to work.

 

[steverebo]

Yeah it was a squeaky but moment!!

I used my heat gun to heat the cpu up whilst in the delid tool so the indium was nice and soft and it came off very easily.

The solder is very soft and got most off with my finger nails and plastic scraper.

I then used some 99 percent alcohol and 3000 grit sand paper to sand the die to a nice shine

I removed all the sealant used clear nail varnish on the exposed points and then applied liquid metal.

Its sitting on there loose but I'm not fussed as I can seal it later when I can gran some high temp sealant

 

[tinytomlogan]

I dont like using an offset as a lot of games nowadays use avx instructions so might as well run at the most stable avx clock I can get this cpu non avx stable at 5.3 no problem at these voltages.

The thing that threw me was watching a few videos of people running 1.45v 5.1ghz avx on a single 360 rad and getting lower temps in prime 95 I cant even run prime 95 without hitting 108 degrees at over a 1 volt less

Stablity wise I've done 12hrs occt non avx, 2hrs aida64 with valley running in the background no errors

Many versions of prime - you can still disable AVX too.