Coffee Lake i7 -- 6 cores?

xWhiplash

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Oct 21, 2009
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Why do you think it will not be in the iMac? They could already be changing the current iMac to have two fans like the iMac Pro and release it sometime early next year. I think we will definitely see the new cooling system in the non-xeon iMac very soon. Especially with the current 2017 iMac i7 heat/fan issues.
 
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fathergll

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Sep 3, 2014
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Why do you think it will not be in the iMac? They could already be changing the current iMac to have two fans like the iMac Pro and release it sometime early next year. I think we will definitely see the new cooling system in the non-xeon iMac very soon. Especially with the current 2017 iMac i7 heat/fan issues.

Given Apple's history of not cannibalizing product lines, I don't see any logical reason why Apple would release a 6 core iMac give the Pro won't even start shipping close to 2018
 
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xWhiplash

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Oct 21, 2009
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Given Apple's history of not cannibalizing product lines, I don't see any logical reason why Apple would release a 6 core iMac give the Pro won't even start shipping close to 2018
Won't all i7's be 6-cores in a few generations?
 
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EugW

macrumors G3
Jun 18, 2017
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I would be surprised if Coffee Lake i7 6-core was not in the next iMac.
Similarly, I would also be a bit surprised if Coffee Lake i5 6-core was not in the next iMac.

Even from a marketing perspective, there isn't really any good reason to keep it out of the iMac.

In fact, I would have bet on it appearing next year and would have waited for it, had I not had to buy a new iMac this year for other more mundane reasons.
 
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CWallace

macrumors 604
Aug 17, 2007
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What a shame it probably won't be in a iMac. I'd assume the next iMac will use the Cannonlake processors almost certainly arriving before a Spring update in 2018.
Yeah we're not going to see an October refresh but if Cannonlake runs late (and being a new process, it may very well) then it could be the June 2018 refresh. At 6-cores and without ECC or a workstation-class GPU, it would not infringe on the iMac Pro.
 
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Lesser Evets

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Original poster
Jan 7, 2006
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... if Cannonlake runs late (and being a new process, it may very well) then it could be the June 2018 refresh.
I hope not.

The news about Cannonlake coming in Q1 2018 and Ice Lake coming in Q4 2018 got me enthused.
Despite being unrealistically optimistic, when examining Intel's history.
 
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EugW

macrumors G3
Jun 18, 2017
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Assuming these numbers are accurate, if I were in the market next year, my preferred model would be the 65 Watt i5-8400, unless Apple dramatically improves the iMac's cooling in the consumer models.

Only 2.8 GHz base, but 6-core.

Screen Shot 2017-07-18 at 8.20.29 AM.png


However, my favourite so far, at least in theory, is the 65 Watt i7-7700 non-K. It would do much better than the i5-8400 in single-threaded work, but I'm guessing it would be roughly in the same ballpark as the i5-8400 in multi-core work.

I would guesstimate that my current i5-7600 is roughly 10-20% slower than the i7-7700 and i5-8400... which is actually a bit better relative performance for the i5-7600 than I was initially predicting. I was hoping the 65 W 6-core model would be clocked a little faster.
 
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fathergll

macrumors 65816
Sep 3, 2014
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So the next iMacs will not have an i7?

Let me clarify, i misread your topic. I just meant i don't not think there will be an iMac refresh with 6 core cannon lake in anywhere near time frame of the iMac Pro release. If i was betting we don't see anything until late 2018.
 
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EugW

macrumors G3
Jun 18, 2017
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Let me clarify, i misread your topic. I just meant i don't not think there will be an iMac refresh with 6 core cannon lake in anywhere near time frame of the iMac Pro release. If i was betting we don't see anything until late 2018.
That seems reasonable, although I personally think it will be mid-2018. I don't think we will have new non-Pro iMacs in 2017 or Q1 2018, regardless if the chips are available or not, partially for marketing reasons.
 
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fathergll

macrumors 65816
Sep 3, 2014
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That seems reasonable, although I personally think it will be mid-2018. I don't think we will have new non-Pro iMacs in 2017 or Q1 2018, regardless if the chips are available or not, partially for marketing reasons.

The $64,000 question to me is whether or not the next iMac is going to have a design change. The current design is 10 years old and I can see Apple wanting to release a new design that further separates the iMac and iMac Pro(might be bad news for power users of the regular iMac as a refresh could be more similar to a giant Macbook Pro on a stand.

If its a major change maybe we see it previewed and shipping at the end of 2018.
 
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EugW

macrumors G3
Jun 18, 2017
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Yeah we're not going to see an October refresh but if Cannonlake runs late (and being a new process, it may very well) then it could be the June 2018 refresh. At 6-cores and without ECC or a workstation-class GPU, it would not infringe on the iMac Pro.
I've been perusing the PC boards, and the gurus there have been saying there will be no Cannonlake S, so no Cannonlake chips suitable for the iMac.

View attachment 709070

However, my favourite so far, at least in theory, is the 65 Watt i7-7700 non-K. It would do much better than the i5-8400 in single-threaded work, but I'm guessing it would be roughly in the same ballpark as the i5-8400 in multi-core work.

I would guesstimate that my current i5-7600 is roughly 10-20% slower than the i7-7700 and i5-8400... which is actually a bit better relative performance for the i5-7600 than I was initially predicting. I was hoping the 65 W 6-core model would be clocked a little faster.
I've been thinking about this more. Even if those speeds are accurate, and even though that leak only has one 65 Watt part at 2.8 GHz, there is also a big hole in that table. For the i5 parts, they jump from 2.8 GHz to 3.6 GHz with nothing in between. Furthermore, the name jumps from the 8400 to the 8600K.

Could there be a 3.2 GHz 8500 that hasn't leaked yet? If so, and if it were a 65 Watt chip, then perhaps that would be the chip to get for people who like quiet iMacs.
 
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Lesser Evets

macrumors 68040
Original poster
Jan 7, 2006
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That chart displays why the next gen. (Coffee Lake) is going to be 30% faster than Kaby. There will be a massive jump in processing if 6 cores becomes the norm from Coffee onward.

The $64,000 question to me is whether or not the next iMac is going to have a design change. The current design is 10 years old and I can see Apple wanting to release a new design that further separates the iMac and iMac Pro...
What does outward design matter? I'd take a much-faster computer in a 1985 Zenith TV shell, if it speeds up my productivity.
 
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EugW

macrumors G3
Jun 18, 2017
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That chart displays why the next gen. (Coffee Lake) is going to be 30% faster than Kaby. There will be a massive jump in processing if 6 cores becomes the norm from Coffee onward.
For multi-core heavy applications. The Adobe Creative Suite might not see much benefit though, and in fact, could be slower in a lot of stuff as compared to the current i7 7700K for example.

What does outward design matter? I'd take a much-faster computer in a 1985 Zenith TV shell, if it speeds up my productivity.
Actually I wouldn't.
 
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Appleaker

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Jun 13, 2016
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Given Apple's history of not cannibalizing product lines, I don't see any logical reason why Apple would release a 6 core iMac give the Pro won't even start shipping close to 2018
No, they will release 6-core iMacs.
These are not additional i7 models, these are the next i7s (and i5s).
 
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Appleaker

macrumors 68020
Jun 13, 2016
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Let me restate. They will not release new iMacs near the launch of the iMac Pro. Later half of 2018 most likely.
Yeah I agree, especially if we’re going to see a redesign as well. I thought you believed these were additional models, and if that was the case then I would agree that we would be unlikely see 6 core iMacs.
 
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EugW

macrumors G3
Jun 18, 2017
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I'm curious as to whether or not Coffee Lake will require a new chipset.

Some say it is 1151 version 2 with a new chipset, and some say it is just 1151 and may use the existing chipset.

If 1151 with the existing chipset, then that could mean some enterprising people could try installing an i7-8700K or something in an existing Kaby Lake iMac.
 
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