Intel Broadwell Thread

[ehume]

. . .
If the OC ceiling is now even lower than a stock 4790K the entire OCing scene will pretty much be dead if Intel maintains stock clocks from Haswell.

Overclocking will never be dead.

 

[richierich1212]

Overclocking will never be dead.

It will be dead if Intel will eventually only allow *E series processors to be overclocked.

 

[DrMrLordX]

I very suspicious of stellar OCing results even if it was real because who knows what kind of cherrypicking was done behind the scenes to get those clocks.

Is nothing sacred? This is Fugger man! Read the thread, it's not like he's hyping the chip . . . the results under phase were frankly awful. Not like it was his fault. Cold just didn't help. Not one tiddly bit. For the XS faithful that's probably disappointing, but for those of us who will never touch anything better than an AiO or a dual-tower HSF, it's certainly not bad news.

Even if you are suspicious of the results, read the detail he goes into on RAM speeds, power domains, etc. It's educational for anyone that's interested in Broadwell.

Overclocking will never be dead.

Damn right.

 

[nenforcer]

Thanks for the link, but that is just like a desktop. The iris pro is wasted. The point was a cheaper one using the iris pro for light gaming.

Your looking for an Intel Core M laptop and those have been out since late last year. They mostly have Intel HD 5300 Graphics without the CrystalWell eDRAM cache so they don't make the greatest gaming machines but that is why they have a TDP down to like 4W I believe.

 

[ClockHound]

Is nothing sacred? This is Fugger man! Read the thread, it's not like he's hyping the chip . . . the results under phase were frankly awful. Not like it was his fault. Cold just didn't help. Not one tiddly bit. For the XS faithful that's probably disappointing, but for those of us who will never touch anything better than an AiO or a dual-tower HSF, it's certainly not bad news.

Even if you are suspicious of the results, read the detail he goes into on RAM speeds, power domains, etc. It's educational for anyone that's interested in Broadwell.



Damn right.

Not that special of a 4C/8T chip when to reach validation only 2C/2T made the cut:

Not sure, but that 0.312V number seems a wee bit low. Maybe those other 2 cores are the power eaters. ;-)

But, on a brighter note, we're doomed!

Have to change the name of this forum to CPUs and Mild Overclocking.

 

[lowmotion]

There is still no review of an retail cpu.

I got the impression that intel got one cpu from one reviewer to another with identical results.

Broadwell´s iGPU is impressive, but a lot of games show some glitches. People say "you can play with Iris Pro games", but its most likely no replacement for discrete graphics. AMD got the better support (catalyst). Forgett broadwell for gaming purpose. And minesweeper will run on every iGPU.

Broadwell runs 4 Ghz at 1.2v Vcore. Haswell runs 4,5 Ghz at 1,2v Vcore. In non-broadwell-supported-games like cryengine-games the haswell performs about 12,5% faster. In broadwell-supported-games like total war you get about 15+% more performance. At that speed and games neither broadwell nor haswell gets the upper hand. The biggest difference you will see is the power consumtion: broadwell takes less power. But on the other side broadwell gets hot.

My final thoughts:

Broadwell performs at the moment "okay", but there could be some suprice. The bios of every mainboard seems to have headroom for some improvements. Perhaps in near future someone will explain the big performance gains in several games.
At the moment i am considering broadwell as low power cpu for my gaming rig. A lot of newer games doesnt requiere more than 2 ghz haswell quadcore power and they will run very fast on an underclocked broadwell at passive cooling.

 

[coercitiv]

Also, for those of you who thought the HKEPC OC was fake . . . do you also think Fugger is a fake?

Are you asking if 4.8Ghz@1.55V is more plausible than 4.8Ghz@1.42V? Suddenly Broadwell jumped from less voltage than Haswell @ 4.7Ghz+ to needing significantly more voltage, yet you still believe the original report was 100% genuine?

 

[Walter E Kurtz]

Are you asking if 4.8Ghz@1.55V is more plausible than 4.8Ghz@1.42V? Suddenly Broadwell jumped from less voltage than Haswell @ 4.7Ghz+ to needing significantly more voltage, yet you still believe the original report was 100% genuine?

There is no comparison with Haswell. 1.6v @ -60C for 4.8Ghz is just terrible.

 

[Sweepr]

Not sure if anyone has posted this, it's a Gadavari review but there's a lot of Core i5 5675C benchmarks:

http://fcenter.ru/online/hardarticles/processors/38489-Obzor_processora_AMD_A10_7870K_Godavari

If there aren't enough results showing Broadwell-K outclassing Kaveri/Godavari at 1080p, here's some more:

http://fcenter.ru/online/hardarticles/processors/38489-Obzor_processora_AMD_A10_7870K_Godavari

 

[DrMrLordX]

Are you asking if 4.8Ghz@1.55V is more plausible than 4.8Ghz@1.42V? Suddenly Broadwell jumped from less voltage than Haswell @ 4.7Ghz+ to needing significantly more voltage, yet you still believe the original report was 100% genuine?

I think the HKEPC overclock was a cherry-picked chip. Fugger is giving us more detail, and is showing us what we should more-realistically expect from retail parts. I'll see if I can get him to post some power draw numbers on the chip (4.8 GHz @ 1.55v) to see how it stacks up vs. Haswell.

Regardless, the idea that there's an insurmountable clockspeed wall @ 4.2-4.4 GHz is not true. It takes sick voltage to get up there, but you can get there.

And yeah, the cold results were pretty bad. Sub-zero temps just aren't helping here.

 

[Fjodor2001]

Not sure if anyone has posted this, it's a Gadavari review but there's a lot of Core i5 5675C benchmarks:

http://fcenter.ru/online/hardarticles/processors/38489-Obzor_processora_AMD_A10_7870K_Godavari

If there aren't enough results showing Broadwell-K outclassing Kaveri/Godavari at 1080p, here's some more:

<Snip>

Intel 5675C: $276
AMD 7870K: $137

 

[ehume]

Was it an ES or retail chip?

 

[Sweepr]

Intel 5675C: $276
AMD 7870K: $137

Sorry, I almost forgot this is not 2011-2014 anymore when we were told Intel would never catch up on the graphics department. Now that Intel dominates CPU+iGPU performance the goalpost moved to price and AMD is familiar to the word cheap.

 

[Sweepr]

Hardware.fr Core i5 5675C Review

Some very interesting results here.
They tested Broadwell-K against Haswell at the same clockspeed (4GHz) under some MT applications and very CPU intensive games and the results are surprising:

Broadwell-K was 17,6% faster (overall) than Haswell @ games and 5,6% faster (overall) @ applications.
The IPC improvement but mostly the eDRAM is doing wonders for games.

>30% faster @ Total War Rome II and >22% @ Arma III.

Their efficiency test also puts Broadwell-K largely ahead of any previous chip.

www.hardware.fr/focus/112/core-i5-5675c-broadwell-cote-cpu-test.html

 

[Enigmoid]

Intel 5675C: $276
AMD 7870K: $137

How does the CPU compare?

 

[Burpo]

Intel 5675C: $276
AMD 7870K: $137

And worth it!

 

[Fjodor2001]

And worth it!

Twice the price for 20% better gaming performance is worth it?

You're better off spending that extra money on a discrete gfx card.

 

[Sweepr]

From the Hardware.fr Core i5 5675C review I mentioned above:

Probably one of the best IPC comparisons we'll have:

Overall gaming performance:

Core i5 5675C is the chip to beat when it comes to CPU intensive games. It largely dominated all games they tested (except Crysis 3), even Devil's Canyon was beaten (despite the clock difference, 4-threads @ 3.1-3.6GHz vs 8-threads @ 4.0-4.4GHz).
We need eDRAM cache in 'E' series enthusiast chips (LGA2011) now Intel.

 

[Burpo]

Twice the price for 20% better gaming performance is worth it?

You're better off spending that extra money on a discrete gfx card.

Better performance and efficiency, plus if I'm building HTPC, I want small & no discreet card..

 

[ShintaiDK]

Twice the price for 20% better gaming performance is worth it?

It offers a hell lot more than just the GPU part. 65W and not an anemic CPU for once.

You're better off spending that extra money on a discrete gfx card.

In that case you wouldnt buy the APU to begin with.

 

[frozentundra123456]

Twice the price for 20% better gaming performance is worth it?

You're better off spending that extra money on a discrete gfx card.

Same is true of AMD's apus as well. That is one reason their sales are in the toilet. At least with broadwell you get state of the art cpu performance as well.

 

[Shivansps]

Besides Broadwell eDRAM and IGP can overclock, im courious to see what the IGP and eDRAM can do with OC.

 

[ehume]

(The above image is from the French review cited. Could not drag it up from Intel) Notice that the CPU square IHS goes over these, which themselves are two IHS's. Boy, the heat must struggle to get out. What do they use for TIM, I wonder?

Did anyone catch if they used an ES or a retail Broadwell?

 

[dark zero]

If Intel comes with their own version of HBM... no one would need nVIDIA anymore too

 

[SPBHM]

so can you overclock the IGP or not? all results I see on hwbot are with the stock IGP