a look at (ry)Zen's IPC - from Excavator to KabyLake

[zMeul]

source: https://forums.anandtech.com/threads/ryzen-strictly-technical.2500572/

 

"The Slit", established member over Anand's forums has done some testing that feature more technical benchmarks that you don't usually see

go check the source for all the benches and results plus in depth technical details on the CPU and chipset (Zeppelin; the chipset is inside the CPU)

 

the tests were conducted at 3.5Ghz

mobo used ASUS CROSSHAIR VI HERO

results with ER mean extremes removed (highest and lowest)

 

let's talk IPC:

 

back in 2015, AMD estimated a 40% IPC increase over Excavator, they achieved that and 6.6% over it - that's good

what's not so good is that Zen's IPC is practically lower than Haswell's, a microarchitecture that's already 4y old - AMD took 5y in development to produce a CPU that's slower than an already 4y old microarchitecture

 

[extremes removed] IPC gains:

• Zen over Excavator: 46.62%
• Zen over Haswell: -7.03%
• KabyLake over Haswell: 14.29% (my math, take with salt)
• Zen over KabyLake: -25.56%

 

the FMA set implementation in Zen seems very problematic as tests with Linpack and Himeno shows:

 

Himeno benchmark (evaluates performance of incompressible fluid analysis code - takes in measurements to precede major loops in solving the Poisson's equation solution using the Jacobi iteration method) shows particularly bad results:

 

and before you start blaming the compiler, here's what "The Slit" said:

Quote

It happens regardless of the compiler used (GCC, MSVC, ICL) so it isn't compiler specific issue.

GCC - GNU Compiler Collection

MSVC - Microsoft Visual C++ compiler

ICL - Intel C++ compiler

 

---

 

AMD needs to get their house in order, because after seeing what happened with this launch, I don't see a bright future for AMD on the market

Intel has nothing to fear from Zen - AMD's products for enterprise (Naples), based on the current IPC, have no reason to exist other than being a cheap alternative

Edited March 5, 2017 by zMeul

[Droidbot]

Ryzen hype train skids, crashes and runs over 5 people because of a serious fuckup on their part

 

But - what board was Zen tested on?

[TechGod]

Hmm. Wonder if its neck in neck with broadwell E then???

 

Just wondering. 

[ace_cheaply]

Correct me if I'm wrong please, but is this saying that kabylake has 25-30% ipc advantage over haswell?  I don't believe that to be the case.

[79wjd]

7 minutes ago, TechGod said:

Hmm. Wonder if its neck in neck with broadwell E then???

 

Just wondering. 

According to this, it shouldn't be, but reviews put it around Broadwell-E (outside of gaming). Not to mention these results put Kaby Lake significantly further ahead of Haswell than it should be. 

[zMeul]

7 minutes ago, Droidbot said:

But - what board was Zen tested on?

ASUS CROSSHAIR VI HERO

 

also, edited OP

 

[Misanthrope]

4 minutes ago, ace_cheaply said:

Correct me if I'm wrong please, but is this saying that kabylake has 25-30% ipc advantage over haswell?  I don't believe that to be the case.

That number looks weird cause it's relative to Excavator, look at the second graph Kaby and Haswell look like they outta.

[DrMikeNZ]

Just now, zMeul said:

ASUS CROSSHAIR VI HERO

Haven't many of the reviewers been having issues with the Asus boards?

[zMeul]

Just now, DrMikeNZ said:

Haven't many of the reviewers been having issues with the Asus boards?

and that's AMD's / ASUS' problem

 

when they fix their shit, maybe he'll retest

[79wjd]

The full suite of IPC @ 3.5ghz tests:

https://forums.anandtech.com/threads/ryzen-strictly-technical.2500572/#post-38770109

[MorganO]

im so confused right now, reviewers are saying its a good cpu(not for gaming) but other people saying its shit???!!!

[Droidbot]

2 minutes ago, zMeul said:

ASUS CROSSHAIR VI HERO

 

also, edited OP

 

There's your issue. People are reporting bad performance metrics when they got the press kit VIHERO instead of the AORUS GAMING board. 

[zMeul]

Just now, Droidbot said:

There's your issue

that's not my issue

it's AMD's and ASUS'

[PCGuy_5960]

14 minutes ago, zMeul said:

let's talk IPC and how it compares to CPUs ranging from Excavator era to Intel's latest KabyLake:

I was spot on  This is EXACTLY how I thought Ryzen would stack up

[TOMPPIX]

why is everyone so fixed on the single core performance, it's multi thread performance destroys every i7 out there in the same price range.

[Droidbot]

Just now, zMeul said:

that's not my issue

it's AMD's and ASUS'

I should've said 'there's the issue' 

excuse my terrible english, I had a shitter of a day yesterday lmao

[zMeul]

1 minute ago, KOMTechAndGaming said:

im so confused right now, reviewers are saying its a good cpu(not for gaming) but other people saying its shit???!!!

I doubt any serious reviewer said it's good for gaming when all benchmarks show Ryzen to be well under KabyLake

[PCGuy_5960]

1 minute ago, Droidbot said:

There's your issue. People are reporting bad performance metrics when they got the press kit VIHERO instead of the AORUS GAMING board. 

No... They were reporting bad performance with the MSI board... The ASUS had memory stability issues...

[MorganO]

Just now, zMeul said:

I doubt any serious reviewer said it's good for gaming when all benchmarks show Ryzen to be well under KabyLake

if you look in the brackets ffs

[Misanthrope]

2 minutes ago, TOMPPIX said:

why is everyone so fixed on the single core performance

Yeah why would a forum full of gamers would focus on one of the main gaming performance metrics of a CPU time and time again shown to be more important than cores (after 4 cores 8 threads)?

 

I fucking wonder why.....

[TOMPPIX]

1 minute ago, Misanthrope said:

Yeah why would a forum full of gamers would focus on one of the main gaming performance metrics of a CPU time and time again shown to be more important than cores (after 4 cores 8 threads)?

 

I fucking wonder why.....

do you see it drop under 60 frames?

[PCGuy_5960]

Just now, TOMPPIX said:

do you see it drop under 60 frames?

The human eye can't see more than 24FPS, so what is your problem /s

[Mira Yurizaki]

Just now, PCGuy_5960 said:

The human eye can't see more than 24FPS, so what is your problem /s

Nintendo's requirement for Ocarina of Time was 20FPS. Clearly 20 FPS is plenty.

[Droidbot]

 

2 minutes ago, PCGuy_5960 said:

No... They were reporting bad performance with the MSI board... The ASUS had memory stability issues...

He ends up getting boards sent to him from AsRock due to the ASUS board having issues. PCGamer also reported issues with it not turboing and turning SMT off.. 

[PCGuy_5960]

1 minute ago, TOMPPIX said:

do you see it drop under 60 frames?

BTW, if you want just 60fps, just get an i5, why are you even considering an R7/i7 CPU?