Intel Skylake / Kaby Lake

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Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
I am just now figuring out how to get the voltage offset to work how I want with my Gigabyte board. Coming from Asus, I have had some learning to do. The good new is, that now with the voltage no longer pinned at 1.235, the 7820x actually looks to be running a good bit cooler. I am 20 minutes into Prime 95 "Standard Blend" with AVX and my hottest core has been 79c. 9c cooler than it was with fixed voltage. It is actually spending much of it's time at 1.133v, which I would assume is because of the AVX offset lowering clocks.



I am going to let it run for a full hour and see how high the temps will climb. Then on to realbench.

Nice, what is your AVX offset?
 
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jpiniero

Lifer
Oct 1, 2010
14,835
5,452
136
"Server first" doesn't mean "we won't get engineers to build the right solutions for client products."

Intel will do dedicated client and server IP configs and uncore configs going forward.

I'm sure they will do a "client" core, but the focus would be Xeon D. Which will be 32 or more cores soon enough be it monolithic or using multiple CPU tiles. So the L2 gets cut and AVX-512 goes away but the mesh stays. As I mentioned I think they are using the mesh to connect to other tiles too.

Since Intel appears to not be doing a Skylake/Kabylake Xeon D (as rumored) I imagine you won't be seeing a refresh until Icelake now. Kind of a long time to go without new product but I guess that's what they will have to do.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
If Coffee Lake launches next month, it will hurt Skylake-X for sure.

I think so, though at Silicon Lottery they are selling delidded 7800Xs @ 5.0 GHZ . On a solid mobo with good MOSFET cooling, that's going to be tough to beat!
Interesting times
 
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Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
I'm sure they will do a "client" core, but the focus would be Xeon D. Which will be 32 or more cores soon enough be it monolithic or using multiple CPU tiles. So the L2 gets cut and AVX-512 goes away but the mesh stays. As I mentioned I think they are using the mesh to connect to other tiles too.

Since Intel appears to not be doing a Skylake/Kabylake Xeon D (as rumored) I imagine you won't be seeing a refresh until Icelake now. Kind of a long time to go without new product but I guess that's what they will have to do.

Why Xeon D? And do we know for sure that Intel is planning a Xeon D "Icelake".
 
Reactions: Pick2
Mar 10, 2006
11,715
2,012
126
I'm sure they will do a "client" core, but the focus would be Xeon D. Which will be 32 or more cores soon enough be it monolithic or using multiple CPU tiles. So the L2 gets cut and AVX-512 goes away but the mesh stays. As I mentioned I think they are using the mesh to connect to other tiles too.

Since Intel appears to not be doing a Skylake/Kabylake Xeon D (as rumored) I imagine you won't be seeing a refresh until Icelake now. Kind of a long time to go without new product but I guess that's what they will have to do.

Client CPU market is at least an order of magnitude larger than Xeon D market. I doubt your assertion is correct.
 
Reactions: Edrick and Ajay

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
MMM toasty. OC'd to 4.7 Ghz it uses 410 W in Blender. They call it "Skyhog", heh.

Google translate is messing up, but if true - seems like something is rotten in Denmark. That said, Intel seems to be terribly quiet about all this, I mean, WTF?
 
Reactions: Pick2

jj109

Senior member
Dec 17, 2013
391
59
91
Google translate is messing up, but if true - seems like something is rotten in Denmark. That said, Intel seems to be terribly quiet about all this, I mean, WTF?

That's from the wall, so ~320W CPU power at 92% PSU efficiency and ~50W of platform power. ~32W/core @ 4.7 GHz sounds in line with Skylake.

What's Intel going to say about it? "Overclocking voids warranty and may cause premature failure blah blah blah"
 

lobz

Platinum Member
Feb 10, 2017
2,057
2,856
136
Easy there, grandpa! We don't want you getting a heart attack over a forum discussion of hardware, do we now?

Basically, what I was driving at is this: A six core Intel cpu costing $389 is holding the entire Ryzen line-up in check. This is a chip with noticeable weaknesses, ie. gaming, and yet it trounces everything AMD. Now, imagine what'll happen in September when the 7700k is shrinked and gains two additional cores and an even larger L3 cache! So, yes, with all AMD's Ryzen chips losing to Intel's hexacore in the vast majority of benchmarks, only three months after release, the picture on the wall is clear enough - AMD needs something better than Zen in it's current iteration to remain competitive. This is where the obsolescence comes in. Indeed, we shall be seeing the replacement soon enough.
I'll check back later to see if you have something objective to say too.

Sent from my VTR-L09 using Tapatalk
 
Aug 11, 2008
10,451
642
126
So Ryzen is a multipurpose CPU, that wins in many productivity benchmarks, looses in games by a small margin and uses 66% of the power. Oh, and costs less too.

You can spin it any way you want.
Just stating the full results of the article instead of one cherry-picked scenario cited over and over and over again by that particular poster. I dont see how stating the facts is "spinning" anything.
 

beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
136

maddie

Diamond Member
Jul 18, 2010
4,787
4,771
136
Awesome. He was able to get a VRMs to overheat in an incredibly unrealistic usage scenario. Guess what? I can blow up the greatest of car engines if you remove the rev limiter.
Did you watch the video?

He claims that you might think the CPU is performing as it should at a certain speed but you get low performance. When you allow it to really perform by increasing the power available, it performs as it should but the power shoots up much higher. You are being fooled by some internal mechanism in the CPU. This is not just as you claim, "He was able to get a VRMs to overheat in an incredibly unrealistic usage scenario".

In other words, your statement is laughable. Try watching it again, you might understand better this time.
 
Reactions: coercitiv

tamz_msc

Diamond Member
Jan 5, 2017
3,865
3,729
136
Awesome. He was able to get a VRMs to overheat in an incredibly unrealistic usage scenario. Guess what? I can blow up the greatest of car engines if you remove the rev limiter.
What was unrealistic about his testing? A guy selling binned and delidded CPUs shouldn't look at the worst-case scenario?
 
Reactions: Drazick

tamz_msc

Diamond Member
Jan 5, 2017
3,865
3,729
136
Interesting part being Civ Vi results. The 5775c wins followed by the 4790k. Anything skylake based clearly slower at minimums. 7900x scoring just barley above FX-levels. So this game seems to be very, very much cache and RAM limited. 5775c clock is 3.3 Ghz...
Wish intel would release a 6-core part with eDram.

3200MHz CL14 DDR4 performs about the same as EDRAM. It's primary function was always intended to be a crutch for the iGPU.
 
Reactions: Drazick

beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
136
3200MHz CL14 DDR4 performs about the same as EDRAM. It's primary function was always intended to be a crutch for the iGPU.

The why is the 5775c clearly faster especially in max? Or are you saying if you test say the 7700k with that RAM it will be much faster? The bench did in fact only use 2400 mhz RAM for the 7700k (unclear what was used for the 5775c).
 

tamz_msc

Diamond Member
Jan 5, 2017
3,865
3,729
136
The why is the 5775c clearly faster especially in max? Or are you saying if you test say the 7700k with that RAM it will be much faster? The bench did in fact only use 2400 mhz RAM for the 7700k (unclear what was used for the 5775c).
Yes, check this out- in games, EDRAM is offsetting the difference between 2133MHz CL11 DDR3 and 2800MHz CL15 DDR4:

http://www.hardware.fr/articles/940-6/cpu-sandy-bridge-vs-ivy-bridge-vs-haswell-vs-skylake-4-g.html

Also, why is it that in the non-gaming benchmarks, EDRAM only makes a difference in 7-Zip, WinRAR, Lightroom and DxO Oprtics Pro?

Compression/decompression and exporting images are memory intensive.
 
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Reactions: Drazick

jj109

Senior member
Dec 17, 2013
391
59
91
Did you watch the video?

He claims that you might think the CPU is performing as it should at a certain speed but you get low performance. When you allow it to really perform by increasing the power available, it performs as it should but the power shoots up much higher. You are being fooled by some internal mechanism in the CPU. This is not just as you claim, "He was able to get a VRMs to overheat in an incredibly unrealistic usage scenario".

I'm sure TahoeDust can just fire up some benchmarks, stress tests, and HWinfo, and show us the CPU Performance Limit Reasons read out. If there's throttling invisible to CPU-Z, it should still show up there. He actually owns the platform and has run a lot of benchmarks, unlike the people that just show up in this thread to troll.

Edit: I'm now wondering how in the world der8auer got a 250W VRM output to throttle at 105C.

FIVR input is 1.8V nominal, so that's 140A.

If these are using IR3550: Divide by 8 phases and you get 2W power loss per phase for a total of 16W waste heat. 6 phase VRM is only nominally worse at 18W.
 
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jj109

Senior member
Dec 17, 2013
391
59
91
If i may ask, the liquid metal compound, which people put directly on the die after delidding to decrease the temps, thats different than indium solder, right?

It's different. Solder is solid and bonds to IHS to the die at operational temperatures. Gallistan-based liquid metal TIM is always liquid unless doing sub-zero cooling, and can outperform solder due to a combination of higher thermal conductivity and thinner TIM possible (since it's liquid).

I'm now thinking about what TG and CLU mixes into the gallistan to make it handle better...
 

DrMrLordX

Lifer
Apr 27, 2000
21,803
11,157
136
If i may ask, the liquid metal compound, which people put directly on the die after delidding to decrease the temps, thats different than indium solder, right?

Yes. Most folks use CLU. You can read about its composition here:

http://www.coollaboratory.com/pdf/safetydatasheet_liquid_ultra_englisch.pdf

It doesn't give percentages, but CLU has a lot of gallium in it. Which is why you shouldn't let it anywhere near aluminum. It DOES have a lot of indium, too.

The other liquid pastes - Phobya Liquid Metal and Thermal Grizzly Conductonaut - do not appear to have safety sheets available. Or if they do, I can't find them.

I'm now thinking about what TG and CLU mixes into the gallistan to make it handle better...

In the case of the old CLP product . . . nothing. CLU has a graphite-copper matrix. Pretty cool huh?

No idea what they use in Conductonaut. Having used both CLU and Condoctonaut, I can tell you that Conductonaut is very . . . different.
 
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mikk

Diamond Member
May 15, 2012
4,172
2,210
136
I would like to know temperatures when the CPU is limited to 140W its rated TDP.
 
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