Intel Skylake / Kaby Lake

[ManyThreads]

Lookie what came in the mail today!

Now fire it up and give us some stats! Congrats!

 

[RichUK]

Lookie what came in the mail today!!

Nice. Keen to see your OC results.

 

[tamz_msc]

Hardware.fr review is out. There's quite a shocker in the cache latency and bandwidth tests page. The most relevant info, clock-for-clock comparison with simulated 8-core Skylake-X, Broadwell-E, Ryzen and Piledriver(for the lulz)

 

[MarkPost]

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[mikk]

At least there is a better IPC in most applications there. But look for games: http://www.hardware.fr/articles/964-6/piledriver-zen-broadwell-e-skylake-x-3-ghz.html


And this is the real shocker. Gaming IPC decreased quite a bit, a good latency is too important for games. That's only Sandy Bridge-Ivy Bridge gaming IPC.

 

[dullard]

At least there is a better IPC in most applications there. But look for games: http://www.hardware.fr/articles/964-6/piledriver-zen-broadwell-e-skylake-x-3-ghz.html


And this is the real shocker. Gaming IPC decreased quite a bit, a good latency is too important for games. That's only Sandy Bridge-Ivy Bridge gaming IPC.

It isn't a shocker at all. More cores isn't needed or helpful in gaming. Anything else that comes as a penalty of more cores (such as the bad latency) will thus really harm gaming.

I wish the more cores = better myth would end. More cores MAY be better, but it is far from a given.

 

[Arachnotronic]

At least there is a better IPC in most applications there. But look for games: http://www.hardware.fr/articles/964-6/piledriver-zen-broadwell-e-skylake-x-3-ghz.html


And this is the real shocker. Gaming IPC decreased quite a bit, a good latency is too important for games. That's only Sandy Bridge-Ivy Bridge gaming IPC.

Games love that huge L3 on Broadwell-E.

Yeah, kind of disappointing that games don't like the bigger L2 more than they don't like the smaller/slower/victim L3.

 

[jj109]

I bet their firmware kept the mesh speed at 2400. PCGH gaming results are completely different. Guru3D shows a 20ns spread in memory latency between MSI and Asus boards when using the same memory. Guru3D also saw a huge spread in gaming performance between the boards as well.

 

[crashtech]

It isn't a shocker at all. More cores isn't needed or helpful in gaming. Anything else that comes as a penalty of more cores (such as the bad latency) will thus really harm gaming.

I wish the more cores = better myth would end. More cores MAY be better, but it is far from a given.

I beg to differ, the test normalized for speed and core count, so the degree of regression is astonishing. The expected outcome is to progress very slightly or at least hold the line.

 

[TahoeDust]

Oh...hello there....

 

[Zucker2k]

Oh...hello there....

Looking good!

 

[frozentundra123456]

It isn't a shocker at all. More cores isn't needed or helpful in gaming. Anything else that comes as a penalty of more cores (such as the bad latency) will thus really harm gaming.

I wish the more cores = better myth would end. More cores MAY be better, but it is far from a given.

Yea, despite all the more cores and "quads are outdated" hysteria, the two fastest gaming cpus are the 7700k and the 7740k.

 

[TahoeDust]

Very quick and dirty OC before dinner.

7820x at 4.5ghz on all cores at 1.15v

 

[TahoeDust]

When running prime it was down clocking to 4.2ghz. Is this because of the AVX offset? Do most people leave the offset in place?

Is prime still the best/most reasonable programs to test stability and temps?

 

[Edrick]

When running prime it was down clocking to 4.2ghz. Is this because of the AVX offset? Do most people leave the offset in place?

Is prime still the best/most reasonable programs to test stability and temps?

The AVX offset affects Prime95. I have set my offset to be 4.

 

[TahoeDust]

What are you using to monitor CPU voltage? CPU-z is definitely not accurate yet. It is reading 1.7x.

 

[Arachnotronic]

When running prime it was down clocking to 4.2ghz. Is this because of the AVX offset? Do most people leave the offset in place?

Is prime still the best/most reasonable programs to test stability and temps?

I like using a combo of Prime95 and ASUS RealBench.

 

[Topweasel]

Or hell the 1.4 GHz Thunderbird Athlons. Those things were close to the razor's edge @ stock. Still awesome, but whew they got toasty.

I really wasn't expecting Skylake-X to be the same way.

Getting popcorn + lawnchair on the VRM issue since I have no personal experience with it. We'll see how this pans out with additional testing.

Nothing is more razor edge then the 1.13 PIII. Had the general instability of an over clocked CPU. Had to be recalled and wasn't seen again till a Die shrink.

 

[Edrick]

What are you using to monitor CPU voltage? CPU-z is definitely not accurate yet. It is reading 1.7x.

I am using AIDA64. But it also has the incorrect value (same as CPUz). The issue is that CPU Core and CPU VID are reversed. So until they fix it, CPU VID reading is actually the core voltage (on AIDS64).

 

[TahoeDust]

I am using AIDA64. But it also has the incorrect value (same as CPUz). The issue is that CPU Core and CPU VID are reversed. So until they fix it, CPU VID reading is actually the core voltage (on AIDS64).

It looks like HWMonitor has it right.

 

[TahoeDust]

Here is 4.8 @ 1.205v. Currently running prime to see what temps do. This thing is pretty nasty.

 

[pantsaregood]

When you run Prime95 for stability testing, be sure that you're using different versions.

26.6 is the last version to not support AVX
27.9 is the last version to not support AVX2

Use the current version for testing AVX2 workloads.

The point of testing this way is to make sure you're stable under varying workloads.

Also, non-AVX testing can help you dial in a higher non-AVX overclock due to considerably less heat output.

 

[TahoeDust]

Here is 20 minutes of prime95 version 29.1 in the "Blend" setting.

 

[multippp]

Here is 20 minutes of prime95 version 29.1 in the "Blend" setting.

The result is something strange. Is it 4.8 @ 1.205v?
The third core is up to 5.3GHz.

 

[TahoeDust]

The result is something strange. Is it 4.8 @ 1.205v?
The third core is up to 5.3GHz.

Very odd. The voltage was set to 1.22v in the bios. When it runs cenibench that is what it reads. I am sure it is the AVX in prime doing something.