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mikk

Diamond Member
May 15, 2012
4,173
2,211
136
I think if it's standard Coffee Lake architecture, the base clock will end up being too low.


They funny about this is that people wrote the same about Coffeelake 6C. Base clock doesn't really matter for i7-8700K. Same for the temp worries.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
They funny about this is that people wrote the same about Coffeelake 6C. Base clock doesn't really matter for i7-8700K. Same for the temp worries.
It probably will matter with the 2 extra cores and 4 extra threads.
 

mikk

Diamond Member
May 15, 2012
4,173
2,211
136
It probably will matter with the 2 extra cores and 4 extra threads.


This is exactly the same what people told before CFL 6C came out. In the end what matters in almost all cases is the Turbo. Base clock is important for extreme AVX workloads which isn't really a topic beside stress tests like Prime95. Maybe they have to go down from 4.3 to 4.0 Ghz for the All Core Turbo on CFL 8C. They might also think about a TDP increase to 105W following AMDs route.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
This is exactly the same what people told before CFL 6C came out. In the end what matters in almost all cases is the Turbo. Base clock is important for extreme AVX workloads which isn't really a topic beside stress tests like Prime95. Maybe they have to go down from 4.3 to 4.0 Ghz for the All Core Turbo on CFL 8C. They might also think about a TDP increase to 105W following AMDs route.

That was my line of thinking, max all core turbo might drop a bit going to 8 cores, or they could bin more aggressively and/or use a slightly lower Vcore. Power wouldn't be a limiting factor at around 4GHz all core turbo especially with lower voltages, if they want to maintain 8700K clocks (4.3GHz ACT) then that might be a challenge.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
To clarify, in my original comment, I suggested to spec Coffee Lake 8-core as 4.3-4.8 GHz, 125 W (rated "95 W").
Ahh fair enough. Then I would agree, would be difficult to maintain 95W unless lower clocks or voltages are used
 

24601

Golden Member
Jun 10, 2007
1,683
39
86
People still not realizing that the "mainstream" line of chips are designed for laptop and that the desktop gets whatever the CPU team can get away with overclocking the laptop chips to.

8 core coffee lake would be an absolutely worthless laptop chip at 35w-45w (Intel's preferred mainstream laptop TDP) compared to a 6 core coffee lake in the same TDP.

390 is the "cannonlake" chipset, which means it would support "icelake" chips as well.

If the rumor has any truth to it at all, it's early engineering samples for icelake cropping up on cannonlake chipset.

Intel doesn't make desktop chips.

They make "mainstream" laptop chips that go into most desktops.

They make "high core count server" chips that go into some desktops.

Ryzen (8c+) also isn't a "desktop" chip, it's a "high core count server" chip re-purposed for desktops.

Intel hasn't made a "desktop" chip since Pentium 4, so stop this stupid argumentation point.
 
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epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
People still not realizing that the "mainstream" line of chips are designed for laptop and that the desktop gets whatever the CPU team can get away with overclocking the laptop chips to.

8 core coffee lake would be an absolutely worthless laptop chip at 35w-45w (Intel's preferred mainstream laptop TDP) compared to a 6 core coffee lake in the same TDP.

390 is the "cannonlake" chipset, which means it would support "icelake" chips as well.

If the rumor has any truth to it at all, it's early engineering samples for icelake cropping up on cannonlake chipset.

Intel doesn't make desktop chips.

They make "mainstream" laptop chips that go into most desktops.

They make "high core count server" chips that go into some desktops.

Ryzen (8c+) also isn't a "desktop" chip, it's a "high core count server" chip re-purposed for desktops.

Intel hasn't made a "desktop" chip since Pentium 4, so stop this stupid argumentation point.

Damn, I had no idea I've been running laptop CPUs on my desktop motherboard for the past decade and a half. Argument over then, Intel doesn't make desktop CPUs...
 
Reactions: pcp7

24601

Golden Member
Jun 10, 2007
1,683
39
86
Damn, I had no idea I've been running laptop CPUs on my desktop motherboard for the past decade and a half. Argument over then, Intel doesn't make desktop CPUs...

Keep believing that Intel would make a mask and an entire "mainstream" line-up purely for desktop that would be terrible for laptop with your only "source" being random AMD viral marketers then.

The total lack of any technical/financial knowledge left on these forums other than the few random AMD engineers assigned to PR posting is showing again.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
Keep believing that Intel would make a mask and an entire "mainstream" line-up purely for desktop that would be terrible for laptop with your only "source" being random AMD viral marketers then.

The total lack of any technical/financial knowledge left on these forums other than the few random AMD engineers assigned to PR posting is showing again.
You are just another board poster as far as I can tell. Why should I rate your claims above any one else's?

"random AMD viral marketers"
"AMD engineers assigned to PR posting"

I've been an Intel fan for a very long time, and that sort of line always undermines credibility...

You might want to leave out the fanboy type remarks in the future. No one will take you seriously, except possibly members of the choir, and that's of no use to you.
 
Reactions: coercitiv

24601

Golden Member
Jun 10, 2007
1,683
39
86
You are just another board poster as far as I can tell. Why should I rate your claims above any one else's?

"random AMD viral marketers"
"AMD engineers assigned to PR posting"

I've been an Intel fan for a very long time, and that sort of line always undermines credibility...

You might want to leave out the fanboy type remarks in the future. No one will take you seriously, except possibly members of the choir, and that's of no use to you.

I will keep posting reality until posting reality gets me banned.

If you do not like reality that is your business.
 

jpiniero

Lifer
Oct 1, 2010
14,841
5,456
136
8 core coffee lake would be an absolutely worthless laptop chip at 35w-45w (Intel's preferred mainstream laptop TDP) compared to a 6 core coffee lake in the same TDP.

Intel has in the past done 55/57W "mobile" parts, that could use the 8 core as well. The 9th Gen 35-45 W H could remain 6 core Coffee Lake.

The problem of course is that 10 nm yield continues to be horrific, AND top clocks of Icelake are going to be lower enough that a desktop part will be slightly slower in games. Combine the two, and the need to release something new every year as to why they would do the 8C CFL.
 

coercitiv

Diamond Member
Jan 24, 2014
6,400
12,852
136
Intel already has pure mobile chips - they cover 4W - 30W spectrum.

Despite what some poster is trying to convey here, this forum always jokingly referred to mainstream desktop chips as "mobile", for the simple reason they are clearly meant to cover the 35W - 95W+ spectrum. Having said that, it doesn't take an AMD engineer assigned to forum duty to observe the 35W- 95W spectrum is complementary to the above pure mobile spectrum, hence these chips are built as hybrids with clear dual role purpose. Calling them "pure" mobile chips is short sighted to say the least, forum infraction material to say the worst.

14nm++ CFL based 8 core providing extra performance in 45W TDP mobile scenarios? Technically possible, commercially insignificant.
14nm++ CFL based 8 core providing performance supremacy in 95W+ TDP desktop scenarios? Technically possible, commercially invaluable.

Whether this 8 core will be CFL based or not I cannot say, haven't been following Intels zig zag cadence close enough lately.
 
Reactions: epsilon84

24601

Golden Member
Jun 10, 2007
1,683
39
86
Intel has in the past done 55/57W "mobile" parts, that could use the 8 core as well. The 9th Gen 35-45 W H could remain 6 core Coffee Lake.

The problem of course is that 10 nm yield continues to be horrific, AND top clocks of Icelake are going to be lower enough that a desktop part will be slightly slower in games. Combine the two, and the need to release something new every year as to why they would do the 8C CFL.

6 core mobile coffee lake isn't even out yet.

6 core mobile coffee lake is the chip you are thinking about if you are talking about a "laptop stop-gap for 2018"

It's hilarious that this forum thinks that Intel is "in dire need of a 8 core coffee-lake to counter the unstoppable Ryzen".

Ryzen caught AMD up to Sandy Bridge, and they fired their CPU designer, so that means it's Bulldozer vs Sandy Bridge all over again, as Skylake is roughly as far ahead of Ryzen as Sandy Bridge was ahead of Bulldozer.
 
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Yuriman

Diamond Member
Jun 25, 2004
5,530
141
106
AMD is clearly unstoppable in their sales of Ryzen, as evidenced by several price drops and sagging stock prices.

Personally, I still have no need for more than 4 cores. Preferably they have HT, are higher clocked and have better IPC, but larger core counts are not at all a consideration when it comes to upgrading for me.

And, I think it would be backwards to buy more cores today for theoretical future needs. I'll buy a 6- or 8- core chip when I need it.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,575
126
6 core mobile coffee lake isn't even out yet.

6 core mobile coffee lake is the chip you are thinking about if you are talking about a "laptop stop-gap for 2018"

It's hilarious that this forum thinks that Intel is "in dire need of a 8 core coffee-lake to counter the unstoppable Ryzen".

Ryzen caught AMD up to Sandy Bridge, and they fired their CPU designer, so that means it's Bulldozer vs Sandy Bridge all over again, as Skylake is roughly as far ahead of Ryzen as Sandy Bridge was ahead of Bulldozer.
All that matter is what Intel thinks.

That last bit is bananas...
 
Reactions: coercitiv

jpiniero

Lifer
Oct 1, 2010
14,841
5,456
136
6 core mobile coffee lake isn't even out yet.

6 core mobile coffee lake is the chip you are thinking about if you are talking about a "laptop stop-gap for 2018"

It's for next year, or perhaps more accurately the 18/19 timeframe (9th gen).
 

Yuriman

Diamond Member
Jun 25, 2004
5,530
141
106
That last bit is bananas...

Yep, nowhere near the gap.

Cinebench singlethreaded, Sandy Bridge had a 50% advantage over 1st gen Bulldozer CPUs, 60% IPC but Bulldozer was clocked higher. By comparison An 8700K has a 26% advantage over a 1700X, and probably 10% of that is clockspeed. Software is better threaded now so the extra cores in Ryzen have more value. I still wouldn't buy Ryzen, it doesn't fit my use-case, but it's not Bulldozer over again.
 

24601

Golden Member
Jun 10, 2007
1,683
39
86
Yep, nowhere near the gap.

Cinebench singlethreaded, Sandy Bridge had a 50% advantage over 1st gen Bulldozer CPUs, 60% IPC but Bulldozer was clocked higher. By comparison An 8700K has a 26% advantage over a 1700X, and probably 10% of that is clockspeed. Software is better threaded now so the extra cores in Ryzen have more value. I still wouldn't buy Ryzen, it doesn't fit my use-case, but it's not Bulldozer over again.

Cinebench was never a good "benchmark" for anything, which is why it's brought up all the time for bad comparisons (It's an obsolete GPU benchmark from forever ago).

In actual applications that people use CPUs (not GPUs) for, it's the same gap.
 

epsilon84

Golden Member
Aug 29, 2010
1,142
927
136
Cinebench was never a good "benchmark" for anything, which is why it's brought up all the time for bad comparisons (It's an obsolete GPU benchmark from forever ago).

In actual applications that people use CPUs (not GPUs) for, it's the same gap.

'IPC' is not a set figure as it all depends on your usage case. I believe Stilt (a respected forum member here) crunched the numbers and Ryzen is, on average, about on par with Haswell, so about 10 - 15% behind Sky/Kaby/Coffee Lake clock for clock.

That clearly is not SB vs BD all over again. SB dominated BD in every facet, whereas CFL has the edge in ST performance but MT is a wash with Ryzen 7 due to a 2 core deficit.
 
Reactions: CHADBOGA

Yuriman

Diamond Member
Jun 25, 2004
5,530
141
106
Cinebench was never a good "benchmark" for anything, which is why it's brought up all the time for bad comparisons (It's an obsolete GPU benchmark from forever ago).

In actual applications that people use CPUs (not GPUs) for, it's the same gap.

I would be interested to see which applications are running 50-60% faster on CFL than Ryzen, with significantly higher power usage to boot. Not that I actively disbelieve you, I just haven't yet seen this.
 
Reactions: VirtualLarry

24601

Golden Member
Jun 10, 2007
1,683
39
86
I would be interested to see which applications are running 50-60% faster on CFL than Ryzen, with significantly higher power usage to boot. Not that I actively disbelieve you, I just haven't yet seen this.

Why would i used numbers from the horri-bad "benchmark" that you are proporting is worth anything in the first place as any kind of baseline?



i5 2500k / FX-4100
69 / 53 = 1.30188679245

4670k / 2500k
86 / 69 = 1.24637681159

And obviously Skylake/Kabylake/Coffeelake will be higher than 4670k.
 
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