Intel Broadwell Thread

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Abwx

Lifer
Apr 2, 2011
11,535
4,323
136
What are you going on about? The Kitguru article clearly states that he was able to boot it @ 5.0 ghz with 1.419v vcore. Am I supposed to take your extrapolative analysis over what they're reporting as fact?


Dont know but it is as likely to happen as an Haswell booting at 5.0 with 1.25V, as said i believe it is possible but not on air...

And what is exactly their info based on to state that this is a fact.?.

A random guy stating that it s the truth, why not displaying the CPUZ in the first pic with screen and the mobo visible, why separate pics..??.


So a guy gets an ES (which is what we've all been waiting for someone to do), puts it through the paces, boots it at 5 ghz, and this is all you've got to say about it? Come on, man! You are basically saying that Lam, HKEPC, Kitguru, and everyone else reporting on this story are boldface liars.

They dont lie, they are gullible due to lack of knowledge on this matter...


That is my expectation. This chip is the first we've seen of it. It's what Intel needed to do to save face
.

I agree with this, and we have the first hints of this marketing campaign through opportunisticaly "leaked" screens with the convenients datas..
 

Sweepr

Diamond Member
May 12, 2006
5,148
1,142
131
I agree with this, and we have the first hints of this marketing campaign through opportunisticaly "leaked" screens with the convenients datas..

Just like the Zen stuff that was latter dismissed by AMD a few days before their analyst day? Except we got actual Broadwell CPU-Z pics and a few benchmarks instead of fake slides full of promises.
 

Dave2150

Senior member
Jan 20, 2015
639
178
116
Yeah, that is why HW presented almost a regression in perf/watt vs IB on the desktop space under load....


Oh, wait...

The FIVR was always about the mobile space and idle power consumption savings, not load scenarios and in the end, listed TDPs.

Idle power is quite important for desktops as well - unless you run you PC at full load 24/7.

I imagine it's less than 1% of desktop owners who run 24/7 100% load, doing distributed computing etc, so your point is moot.
 

PPB

Golden Member
Jul 5, 2013
1,118
168
106
Idle power is quite important for desktops as well - unless you run you PC at full load 24/7.

I imagine it's less than 1% of desktop owners who run 24/7 100% load, doing distributed computing etc, so your point is moot.

It is important for this argument subject, since people here are comparing desktop chips and their TDP across different different Core uarchs.

So pardom me for being reiterative and saying: The FIVR actually adds to the max TDP is listed at and to the maximum CPU power consumption, because the heat loss product of the inneficiency of converting the 12V rail into the 1.8VRIN is now on the CPU. No moving goalposts will ever change this fact.
 

crashtech

Lifer
Jan 4, 2013
10,578
2,146
146
I thought FIVR was just doing some fine tuning as a cascaded VRM. 12V does not go into the die.
 

PPB

Golden Member
Jul 5, 2013
1,118
168
106
I stand corrected, the CPU logic receives each voltage that the FIVR converts from the VRIN. It is the motherboard VRM that turns 12V into the VRIN voltage.
 

coercitiv

Diamond Member
Jan 24, 2014
6,616
14,010
136
Broadwell vs Haswell mobile chips @ 2.7Ghz

i7 5600U - 1.023V
i7 4510U - 0.919V
i7 4700HQ - 0.875V



Broadwell vs Haswell mobile @3.2Ghz

i7 5600U - 1.200V
i7 4600U - 1.060V (@3300Mhz)
i7 4700HQ - 0.976V




Broadwell leak vs Haswell DC desktop overclock

i7 5775C @ 5.0Ghz - 1.42V
i7 4790K @ 4.7Ghz - 1.45V




Look at the voltage difference and judge for yourselves.

CPUz screenshots used were taken from Notebookcheck (5600U, 4600U), my systems (4510U, 4700HQ) and Anantech (4790K)
 
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mikk

Diamond Member
May 15, 2012
4,241
2,293
136
CPUz 1.70.0/1.71.1 from July 2014/October 2014, not sure if this can be useful for Broadwell-U.
 

coercitiv

Diamond Member
Jan 24, 2014
6,616
14,010
136
CPUz 1.70.0/1.71.1 from July 2014/October 2014, not sure if this can be useful for Broadwell-U.
Do you have more relevant data? Please share!

PS: Release notes for CPUz 1.72
February 27th, 2015

  • Preliminary support for Intel Skylake.
  • Fixed support for Windows 10 build 9926.
 
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DrMrLordX

Lifer
Apr 27, 2000
22,021
11,594
136
They dont lie, they are gullible due to lack of knowledge on this matter...

So Lam and HKEPC aren't lying, they're just stupid? That isn't much better you know.

What knowledge are they missing that is in our possession? Unlike us, they have at least one ES. They've installed it, tuned it, booted it, and benched it. Do you really think both CPU-z AND the BIOS are misreporting voltages so severely that they don't know wtf they are doing?

Compared to them, we have nothing, except extrapolative analysis based on products that don't even have any real bearing on the i7-5775C.

I don't know what are your priorities, but if given the chance to examine benchmarks and screenshots from someone that actually has the physical silicon on hand, versus rummaging through a bunch of CPU-z screenshots from entirely different chips and doing comparative estimates, I'll take the reports from the physical chip any day of the week.

If you or anyone else are threatened by the idea that Intel might actually be able to reach decent clockspeeds on some version of their 14nm process, well, too bad. Please don't sling accusations at the people who are giving us the data that we should actually want when the data does not meet expected norms.

I agree with this, and we have the first hints of this marketing campaign through opportunisticaly "leaked" screens with the convenients datas..

So now Lam/HKEPC are acting as pro-Intel shills? Intel has been leaking ESes for years, sometimes intentionally and sometimes not. Those Conroe leaks back in '05 and early '06 were mostly accurate, and if I recall correctly, the ES reports on Nehalem, Ivy Bridge, Sandy Bridge, and Haswell were duly informative. What makes you think that a Broadwell-C ES leak from maybe one month before launch is a pile of pro-Intel marketing fud?

Take a step back, dude, this ain't right. Retail chips might or might not clock that well, but this leak is probably the best info yet we've got on the chip. Please don't shoot down the guys who go to the trouble of giving us these kinds of numbers. We need more information like this in the OC community, not less.

Meanwhile, there are some people getting early retail samples of the A10-7870k and they are getting some positive results out of those, too. Do you want the Intel zealots using the same tactics to accuse them of dishonesty, stupidity, or flat-out shilling? And if any of us want to believe that AMD can actually reach good yields, IPC, and clockspeeds on 14nm Zen on down the road, shouldn't we also give Intel enough credit to believe that they can reverse the downward clockspeed trend with their 14nm process, especially when there is now physical evidence that serves as a positive indicator?

Have we become so partisan that we can't even accept benchmarks and screenshots if we don't like them?

Do you have more relevant data? Please share!

PS: Release notes for CPUz 1.72

That's the most recent edition available, at least as a stable release. CPUID is usually pretty good about getting chips supported before broad retail availability.

Now if the UEFI is flaky and the board is misreporting voltages, then there's not much CPU-z can do about that.
 
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coercitiv

Diamond Member
Jan 24, 2014
6,616
14,010
136
shouldn't we also give Intel enough credit to believe that they can reverse the downward clockspeed trend with their 14nm process, especially when there is now physical evidence that serves as a positive indicator?
If this were true and they made such great progress with 14nm, imagine the shock of 20-30% power usage reduction on refreshed Broadwell U chips going down from 1.2V to 1V.
 

DrMrLordX

Lifer
Apr 27, 2000
22,021
11,594
136
If this were true and they made such great progress with 14nm, imagine the shock of 20-30% power usage reduction on refreshed Broadwell U chips going down from 1.2V to 1V.

I suspect that the high-performance node would produce inferior results when used for low-power Broadwell mobile parts.

Well, as far as UEFI and boards are concerned, the Broadwell data came from Thinkpad T550 review dated March 2015 and Thinkpad T450s review dated Feb 2015.

That's not what I was talking about, though. I was talking about the UEFI on the board Lam was using to bench his ES Broadwell-C chip. So far as anyone can tell, the readings he got were legit, but it's theoretically possible (however remote) that the board support for the CPU may be leading to misreported voltages. In all likelihood, though, the reported voltages were accurate.
 

Abwx

Lifer
Apr 2, 2011
11,535
4,323
136
So Lam and HKEPC aren't lying, they're just stupid? That isn't much better you know.

What knowledge are they missing that is in our possession?

They should do their homework if they pretend to be genuine tech sites..

Unlike us, they have at least one ES. They've installed it, tuned it, booted it, and benched it. Do you really think both CPU-z AND the BIOS are misreporting voltages so severely that they don't know wtf they are doing?

As said it is impossible that the voltage trend is reversed to this point as frequency increase, this is where the mistake was done and this put under question their honnesty.

Compared to them, we have nothing, except extrapolative analysis based on products that don't even have any real bearing on the i7-5775C.

We have brains to check what is realistic and what is not.

I don't know what are your priorities, but if given the chance to examine benchmarks and screenshots from someone that actually has the physical silicon on hand, versus rummaging through a bunch of CPU-z screenshots from entirely different chips and doing comparative estimates, I'll take the reports from the physical chip any day of the week.

In this case they should release the whole datas rather than displaying what seems more to be organised marketing, and i have no other priority than discussing tech, generaly in the AMD threads but currently it s Intel that is under scrutinity by the tech crowd, hence my presence here, to discuss specificaly about tech.


If you or anyone else are threatened by the idea that Intel might actually be able to reach decent clockspeeds on some version of their 14nm process, well, too bad.

Lol, i m just analysing the datas, what are you speaking of..?.

On topic they cant reverse this behaviour, a process as such means nothing as it s not a start but a end, that is, the mean to manufacture transistors with the required caracteristics, and all fets transistors behave the same by principle, whatever the process, that s why it s easy to point thoses slides as conveniently maked up.


So now Lam/HKEPC are acting as pro-Intel shills? Intel has been leaking ESes for years, sometimes intentionally and sometimes not. Those Conroe leaks back in '05 and early '06 were mostly accurate, and if I recall correctly, the ES reports on Nehalem, Ivy Bridge, Sandy Bridge, and Haswell were duly informative. What makes you think that a Broadwell-C ES leak from maybe one month before launch is a pile of pro-Intel marketing fud?

Take a step back, dude, this ain't right. Retail chips might or might not clock that well, but this leak is probably the best info yet we've got on the chip. Please don't shoot down the guys who go to the trouble of giving us these kinds of numbers. We need more information like this in the OC community, not less.

Like the 4770K they sent to the reviewers, 72W under Prime 95 at Hardware.fr with the Intel sample and then 80W with a retail product tested when DCanyon was launched...

I m not doing FUD, quite the contrary, i m warning the tech crowd that there s eventual deceptive marketing campaign, would it be the first time that such thing would occur..??.

At first sight i would say that teh marketing idea is to induce people thinking that the chip overclock well, it s exactly what was made when they launched Dcanyon and displayed over optimistic screen prior to launch...

Have we become so partisan that we can't even accept benchmarks and screenshots if we don't like them?


I didnt negate the bench, the screenshot at 3.7 and 1.227V look genuine, it s the 4.8 and 5.0 screens that are totaly made up, so for one you didnt read accurately waht i posted and are hence doing wrong claims...
 

DrMrLordX

Lifer
Apr 27, 2000
22,021
11,594
136
They should do their homework if they pretend to be genuine tech sites..

What homework? You take the chip, you install it, you install the HSF, you install the OS + software, you boot, you tune the UEFI, and then you bench it and report results.

You don't stick your head in the sand because the voltage scaling doesn't match expectations from Broadwell-U and Broadwell-D results from months earlier.

As said it is impossible that the voltage trend is reversed to this point as frequency increase, this is where the mistake was done and this put under question their honnesty.

Of course it's possible! They did a respin of the process, making of it a high-performance node that would be unsuitable for low power ICs. Why do you think Broadwell-C took so long to reach market? It's a test-case for Skylake.

It is the only feasible way for Intel to continue covering such a broad spectrum of the computing market with the same basic core design.

We have brains to check what is realistic and what is not.

Your perceptions are skewed. What you WANT is for Intel to be stuck at 4 ghz and below for the next 2-3 years so that AMD can play catch-up. Sorry, but it didn't happen that way.

In this case they should release the whole datas rather than displaying what seems more to be organised marketing, and i have no other priority than discussing tech, generaly in the AMD threads but currently it s Intel that is under scrutinity by the tech crowd, hence my presence here, to discuss specificaly about tech.

Then go and get your own ES and run your own benchmarks, if you don't like the presentation. Or go run your own investigation of Lam and HKEPC and prove to us that they are fudging numbers. Right now you have no proof.

Lol, i m just analysing the datas, what are you speaking of..?.

That's bs and you know it. We should all be glad you weren't around here in '05 when the Conroe leaks started to roll in. You would have dredged up a bunch of 65nm Presler and Cedarmill voltage scaling charts to show us why Conroe couldn't possibly do so well on Intel's 65nm process, and in so doing, you would have accused a bunch of actual PC enthusiasts of lying about their ES samples.

Many were expected/wanting Intel to continue to backslide on peak clockspeeds as their process shrinks conitinued. They FINALLY bucked the trend. Get over it.

On topic they cant reverse this behaviour

Yes they can, and apparently they did. If someone like pm came in here and said, "Sorry guys, there's 99.99% chance that these leaks are fake, my bosses just told me so", I might listen to that guy, given what he does for a living. Anyone less than that? No, unless they also had an ES and had gotten different results.



a process as such means nothing as it s not a start but a end, that is, the mean to manufacture transistors with the required caracteristics

So, the most logical conclusion here is that it is not the exact same process.

I m not doing FUD

Yes, you are. What you are spreading is the very definition of FUD :

Fear, Uncertainty, and Doubt

You want to plant fear in the mind of others; fear that Intel will forever lower clockspeeds as the continue to pursue the mobile market

You create uncertainty by presenting data gathered from different processors coming from different wafers, without entertaining the possibility that Intel did a respin of the process.

You doubt that Intel actually has within their vast, well-paid R&D department that consumes billions of dollars a year the minds capable of maintaining two different 14nm processes aimed at different market segments.

Any RATIONAL human being would have deducted that Intel engineers detected problems with clockspeed/voltage scaling with their low-power 14nm that we first saw in Broadwell-Y and Broadwell-U well before any of us forum junkies. So they would have used their considering resources and talent to fix the problem. Now they likely have a 14nm that is suitable for desktop, HEDT, and high-clockspeed server chips (read: not Broadwell-D).

Such deductive reasoning is only useful in the presence of data obtained through direct physical experimentation with a suitable sample (in this case, an i7-5775C). Anything less than that simply isn't good enough. It would be like trying to examine chickens to learn more about the nature of living turkeys, pigs, and cows.

You are using deductive reasoning to refute inductive reasoning. If you do not like the presentation of data, politely contact the source and request further data. Be curious and interested, not curmudgeonly and combative. Be scientific! Test up close, don't just analyze from a distance. If you can not obtain the sample for yourself, you are stuck with whatever results you get from the person that does have access to the sample.

For you to impugn the reputation of the tester as being ignorant and biased (or fundamentally compromised) is an incredible insult. You probably don't even know Lam, much less know anything about the test setup or chosen methodology. What empowers you to criticize something you haven't even the curiosity to examine objectively?

I don't know Lam either, and I only know what Kitguru and other sources have chosen to share with us. Until I get more data points, this is the best I've got, and I'm certainly not going to pretend that a boatload of old, irrelevant data empower me to accuse him of fraud and/or stupidity.

quite the contrary, i m warning the tech crowd that there s eventual deceptive marketing campaign, would it be the first time that such thing would occur..??.

Okay, show me the last time Intel used an ES leak to deliberately mislead the public about an upcoming product. Conroe? Oh wait, no, that really was a good product. Nehalem? No, all those Gulftown leaks pretty-much turned out to be true too. Got anything else?

Intel has played dirty games before, but not with ES leaks.

At first sight i would say that teh marketing idea is to induce people thinking that the chip overclock well, it s exactly what was made when they launched Dcanyon and displayed over optimistic screen prior to launch...

You mean leaks like this one? All the 4790k leaks pointed to 4 ghz base clock and 4.4 ghz turbo, which is what happened. You had some people wishing for 5 ghz Haswell and 5 ghz Pentium G3258, but neither Intel nor those in possession of ES chips actually showed that happening.

I didnt negate the bench, the screenshot at 3.7 and 1.227V look genuine, it s the 4.8 and 5.0 screens that are totaly made up, so for one you didnt read accurately waht i posted and are hence doing wrong claims...

I read what you posted. Nothing you say means anything compared to concrete results, which is what Lam is saying he's got. You have no empirical evidence showing the contrary, only deductive nonsense.

If you think he's full of crap, buy an i7-5775C and show the world why it won't do suicide runs @ 4.8Ghz or 5Ghz or even 4.6-4.7 ghz ala Haswell. Show us that Intel is still using their low-power node for Broadwell-C. What we don't need is endless speculation and prattling. We need good old-fashioned benchmarking with real hardware. We need hard science. What we don't need are more people chained to the wall of Plato's cave, grasping at shadows.
 

SAAA

Senior member
May 14, 2014
541
126
116
Broadwell vs Haswell mobile @3.2Ghz

i7 5600U - 1.200V
i7 4600U - 1.060V (@3300Mhz)
i7 4700HQ - 0.976V




Broadwell leak vs Haswell DC desktop overclock

i7 5775C @ 5.0Ghz - 1.42V
i7 4790K @ 4.7Ghz - 1.45V




Look at the voltage difference and judge for yourselves.

CPUz screenshots used were taken from Notebookcheck (5600U, 4600U), my systems (4510U, 4700HQ) and Anantech (4790K)

I know this isn't Broadwell, but it's still 14nm process at stock apparentely:



It should be pretty clear that there's a big difference between processes even at the same node size, the mobile chip above needs 1.2V for 3GHz while this runs above 4...
So 1.42V for a 5GHz Broadwell doesn't sound that unreal.

Beside it's an unsafe voltage for such a small process, considering most people don't run Haswell above 1.35...
 

Abwx

Lifer
Apr 2, 2011
11,535
4,323
136
I know this isn't Broadwell, but it's still 14nm process at stock apparentely:



It should be pretty clear that there's a big difference between processes even at the same node size, the mobile chip above needs 1.2V for 3GHz while this runs above 4...
So 1.42V for a 5GHz Broadwell doesn't sound that unreal.

Beside it's an unsafe voltage for such a small process, considering most people don't run Haswell above 1.35...

1.175V is a voltage for 3.3-3.6, depending of the binning, so either this screen was faked, or the cooling use LN2, or eventualy the chips just entered turbo mode and CPUZ is still displaying the iddling value, but in now way the base frequency at 1.175V could be 4GHz either...

At 4.137GHz expect 1.275-1.350V depending on the chips, for instance the first pic in Coercitiv post is from an Apple McSomething, voltage binning is 5% better than for other brands apparently, this result in 10% better perf/watt.

Granted that s not a Broadwell and i m basing my assumption on this chip s numbers, but SKL can only use the same process with the same caracteristics if it was manufactured those past months...
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
I have a strong feeling Intel will inflate Broadwell desktop SKU prices for two reasons.

Haswell DC is cheaper to produce and they already have lots of them.

Skylake, they would prefer people to upgrade both a Motherboard + CPU than CPU alone. Also, they would like to push DDR-4 from top(2011) to bottom(1151).
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
106
I have a strong feeling Intel will inflate Broadwell desktop SKU prices for two reasons.

Haswell DC is cheaper to produce and they already have lots of them.

Skylake, they would prefer people to upgrade both a Motherboard + CPU than CPU alone. Also, they would like to push DDR-4 from top(2011) to bottom(1151).

Do you consider 367$ (And maybe cheaper) for an i7 5775C inflated? (MSRP of the i7 4770R is 358$)

The last inflation of prices was done by another company, that have been doing one price cut after the other ever since.
 

coercitiv

Diamond Member
Jan 24, 2014
6,616
14,010
136
At 4.137GHz expect 1.275-1.350V depending on the chips, for instance the first pic in Coercitiv post is from an Apple McSomething, voltage binning is 5% better than for other brands apparently, this result in 10% better perf/watt.
In my pics the 4510U is from a Toshiba Satellite Z30-A (Feb 2015), the 4700HQ is from an Asus N550JV (Aug 2013), the 4600U is from a HP EliteBook 850. A previous post contains the Thinkpads used as Broadwell reference. If you're referring to the 4700HQ voltage, it might be better than the median, but then again that is why I also included the other HW CPU for good measure.

I know this isn't Broadwell, but it's still 14nm process at stock apparently
It certainly helps paint a more reassuring picture, especially since I do hope any breakthroughs they had on the high performance node might partially affect the low power node as well.

Nevertheless, my enthusiasm will still be refrained until I see a stock voltage part.
 

Abwx

Lifer
Apr 2, 2011
11,535
4,323
136
If you're referring to the 4700HQ voltage, it might be better than the median, but then again that is why I also included the other HW CPU for good measure.
.

I was refering to this BDW 2.7/1.023V, seems that it s on an Apple device :



That said voltage is not all, a higher voltage doesnt matter that much if capacitances are reduced accordingly, here capacitance has been reduced by a 0.65 factor according to Intel, if a higher voltage is needed it means that capacitance being improved it s forcibly the transistors caracteristics that are degraded in respect of 22nm, the only real advantage will be density.
 
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