Coffeelake thread, benchmarks, reviews, input, everything.

[Zucker2k]

I will repost from locked thread since there I have not got answer to my question:

In my country Asrock H270 mITX mobo costs less than some B250 MoBos. I don't believe we will see price changes between MoBos from X2XX chipset to X3XX chipset for Intel platform. So here is a question, actually.

If I have a MoBo that has 2666 MHz memory compatibility, and CPU that is locked and capable of running 2400 MHz, can I still buy 2666 Mhz and run it full speed?

Also. So now we know that only K CPUs are getting price hike, vs Kaby Lake? All other SKUs have the same prices?

Best bet, check from a forum (about your motherboard and chip combo) or google it. What chip are you running? I'd check ARK and the mobo manufacturer's QVL list too.

 

[DrMrLordX]

The maximum memory speed should be the lowest of the two limits. So in this case, the IMC limiting you to DDR4-2400 would set your maximum RAM speed.

 

[beginner99]

But expand that to include HyperThreading on Intel, and SMT on Ryzen, and run a core/core, thread/thread, clock/clock comparison, and see where the "IPC comparison" lies. It may even show Ryzen coming out ahead, in their "measured multi-threaded IPC", due to the superiority of their SMT implementation.

True for Cinebench, not true for many games where turning off SMT actually increases performance, especially minimum FPS considerably. Yes, HT can also have a slight negative effect but never as severe as SMT. There are always 2-sides to the coin.

There is not denying intel is the ST king and that ST matters greatly for everyday use and gaming. However you can also argue it's not worth the added price for some users.

 

[Glo.]

Best bet, check from a forum (about your motherboard and chip combo) or google it. What chip are you running? I'd check ARK and the mobo manufacturer's QVL list too.

From what I see, Core i3's have 2400 MHz memory controller. Every MoBo with B360, H370 should be able to run RAM with 2666 MHz. And this is the context.

If I will buy ASRock H370 mITX MoBo, and 4C/4T 8100T, that has 2400 MHz controller, will I be perfectly fine running 2666 MHz RAM in this setup?

 

[slashy16]

Here's hoping anandtech has their review up thursday along with 8600/8700k overclocking results in each of their benchmarks. The 8700k will be an instabuy if it manages 5ghz on air across all cores, which looks likely. 14nm ++ looks amazing from these early leaks. I wonder if Intel has a 14nm +++ in the works for the next refresh if 10nm isn't ready.

 

[Zucker2k]

From what I see, Core i3's have 2400 MHz memory controller. Every MoBo with B360, H370 should be able to run RAM with 2666 MHz. And this is the context.

If I will buy ASRock H370 mITX MoBo, and 4C/4T 8100T, that has 2400 MHz controller, will I be perfectly fine running 2666 MHz RAM in this setup?

I believe so. Intel raised Coffeelake's memory support to 2666 MHz. All the same, bios always has a say about these things.

 

[Zucker2k]

Here's hoping anandtech has their review up thursday along with 8600/8700k overclocking results in each of their benchmarks. The 8700k will be an instabuy if it manages 5ghz on air across all cores, which looks likely. 14nm ++ looks amazing from these early leaks. I wonder if Intel has a 14nm +++ in the works for the next refresh if 10nm isn't ready.

I don't know about you, but I hope they do. A lot of their products will benefit from these node tweaks in the following years.

 

[Bouowmx]

From what I see, Core i3's have 2400 MHz memory controller. Every MoBo with B360, H370 should be able to run RAM with 2666 MHz. And this is the context.

If I will buy ASRock H370 mITX MoBo, and 4C/4T 8100T, that has 2400 MHz controller, will I be perfectly fine running 2666 MHz RAM in this setup?

Can't do memory overclock unless processor and motherboard are designated for overclocking. Memory will default to frequency defined in the module's SPD (serial presence detect), usually 2133 or 2400 MT/s.

 

[eddman]

Can't do memory overclock unless processor and motherboard are designated for overclocking.

What about Z*70 with a non-K CPU? I plan on buying a non-K CFL. Not being able to use faster RAM will be a bummer.

 

[Zucker2k]

What about Z*70 with a non-K CPU? I plan on buying a non-K CFL. Not being able to use faster RAM will be a bummer.

Coffeelake will support 2666MHz out of the box. Which chip are you planning to get?

 

[Arachnotronic]

What about Z*70 with a non-K CPU? I plan on buying a non-K CFL. Not being able to use faster RAM will be a bummer.

TBH, just buy the higher-end K chips for the memory overclocking. You also get faster stock clocks too 🙂

 

[Glo.]

Coffeelake will support 2666MHz out of the box. Which chip are you planning to get?

Motherboards will support 2666, and 2400 MHz at least B360 and H370, chipsets.

Core i3 8100 will support 2400 MHz, and Core i5 and i7 - 2666, and higher.

And this is the most confusing thing with launch.

So no matter what MoBo I will buy, I will have 2666 MHz memory support. But if I will buy Core i3 will I be able to put there 2666 MHz RAM, and will it work, without any problem?

 

[eddman]

TBH, just buy the higher-end K chips for the memory overclocking. You also get faster stock clocks too 🙂

Out of my budget for now. So I can't use an 8400 with say 3000 RAM modules?

Coffeelake will support 2666MHz out of the box. Which chip are you planning to get?

8100, but if I can manage it, an 8400.

 

[Zucker2k]

Motherboards will support 2666, and 2400 MHz at least B360 and H370, chipsets.

Core i3 8100 will support 2400 MHz, and Core i5 and i7 - 2666, and higher.

And this is the most confusing thing with launch.

So no matter what MoBo I will buy, I will have 2666 MHz memory support. But if I will buy Core i3 will I be able to put there 2666 MHz RAM, and will it work, without any problem?

In that case, no.

 

[Zucker2k]

Out of my budget for now. So I can't use a 8400 with say 3000 MHz modules?

Why not 8350K, then there'll be no doubt? Check ARK.

 

[Arachnotronic]

Out of my budget for now. So I can't use a 8400 with say 3000 RAM modules?


8100, and if I can manage it, an 8400.

You can, but it will be limited to DDR4-2666 AFAIK. I hope this issue is addressed in the CFL reviews.

 

[Bouowmx]

About all the recent questions regarding using memory modules rated for higher frequency than processor can support (without overclock): The higher-rated memory will work, just not at its rated frequency. Memory frequency to default to what's included in SPD (2133 or 2400 MT/s, from my knowledge), and if the SPD frequency is below the processor's maximum memory frequency, in BIOS, you can tune the memory frequency and timings up to the maximum processor supported frequency.

 

[VirtualLarry]

About all the recent questions regarding using memory modules rated for higher frequency than processor can support (without overclock): The higher-rated memory will work, just not at its rated frequency. Memory frequency to default to what's included in SPD (2133 or 2400 MT/s, from my knowledge), and if the SPD frequency is below the processor's maximum memory frequency, in BIOS, you can tune the memory frequency and timings up to the maximum processor supported frequency.

Except, if you use a "Z" board, you can overclock the RAM to your heart's desire, up to the limits of the memory controller on the CPU, and your RAM's capability.

And since the only initial chipset on boards for Coffee Lake are going to be "Z" (370) boards, there you have it. Memory overclocking, from the get-go. So this supposed 2667 limit, is really no limit at all, unless you are using a later 2018 lower-chipset board.

 

[maddie]

True for Cinebench, not true for many games where turning off SMT actually increases performance, especially minimum FPS considerably. Yes, HT can also have a slight negative effect but never as severe as SMT. There are always 2-sides to the coin.

There is not denying intel is the ST king and that ST matters greatly for everyday use and gaming. However you can also argue it's not worth the added price for some users.

Am I missing something here? SMT vs HT.

 

[Zucker2k]

Am I missing something here? SMT vs HT.

Spoiler

 

[Markfw]

Spoiler

Well, I can't find a link right now, but that's ONE piece of software. Most others, SMT on Ryzen is more gain than HT on Intel.

BUT THIS IS AN INTEL THREAD, SO GET BACK ON TRACK.

 

[MBrown]

Has it been confirmed that Z370 will not support 8c coffelake (or whatever it will be called)?

 

[Arachnotronic]

Has it been confirmed that Z370 will not support 8c coffelake (or whatever it will be called)?

It will almost certainly support the 8 core CFL if it exists.

 

[elpokor]

so I just saw this reposted in hardforum, original source Baidu. Can't give it much credibility, what do you guys think? DDR4 speeds trigger my fake-meter up to the redzone, and so does LGA1161 and LGA2076.

edit: original post http://tieba.baidu.com/p/5353174380

 

[Arachnotronic]

so I just saw this reposted in hardforum, original source Baidu. Can't give it much credibility, what do you guys think? DDR4 speeds trigger my fake-meter up to the redzone, and so does LGA1161.

100% fake. Cannon Lake server was cancelled long ago (replaced by Cascade Lake), Tiger LakeX is not a thing (after Ice Lake-Server comes Sapphire Rapids), an AVX512-enabled Cannonlake 8750K doesn't make any sense; a new arch would mean a new product line.

DDR4-2800 is also wrong for the 8xxx X chips, next step after DDR4-2666 is DDR4-2933.

Basically this table is garbage.