*** AMD "Zen" thread (inc AM4/APU discussion) ***

[Orangey]

They haven't said from what arch.

And digitimes is not a clickbait site. FFS I knew they'd delay it. They ALWAYS delay and screw up.

 

[Martini1991]

Ultimately. No one knows, everything depends on context.

I'm hoping for some type of sandy bridge 8 core type chip ultimately.

 

[Orcvader]

I thought it was already stated to be 40% from Excavator?

 

[DragonQ]

Yes. Interestingly, that graph might suggest that they think they can improve Zen over the coming years by 15-20% in terms of IPC. It's more likely it's just a graphically nice arrow and they didn't put that much thought into its angle.

 

[d_brennen]

Never read anything into graphs on slides unless they have detailed axis. Even then, probably better to disregard slides completely

 

[Orangey]

I remember that slide and there was no text saying the core names.

 

[meldarthx]

They haven't said from what arch.

And digitimes is not a clickbait site. FFS I knew they'd delay it. They ALWAYS delay and screw up.

oh please digitimes has been known for a long time as a clickbait site - its how they get most money....They've been caught several times picking up completely wrong stories and run with them as the rest of the web has.

This is coming from an old AMD slide *from March 2015* that had Zen APUs pushed back to 2017; which was their time frame from pretty much the beginning Summit Ridge hasn't been delayed and was show off......

So where is the delay? what's been Delayed? again this looks like damage control

 

[jigger]

when they say 40% IPC increase they mean from the FX 9xxx series? if that is the case then it is too little too late.

FX 9xxx at 4.7GHz get 113 Single Core Score in CINEBENCH R15
Skylake at 4.7GHz get 204 Single Core Score in CINEBENCH R15

as we can see from cinebench, Skylake show almost double IPC.

So an 8 core Skylake would be too little too late

 

[Lokken86]

Yes. Interestingly, that graph might suggest that they think they can improve Zen over the coming years by 15-20% in terms of IPC. It's more likely it's just a graphically nice arrow and they didn't put that much thought into its angle.

At least they give the impression they feel its going up. Nobody would be impressed by a 90 degree right arrow

 

[humbug]

I thought it was already stated to be 40% from Excavator?

The blue bit, yes.

 

[Orcvader]

Well, I wasn't posting the graph for the claimed performance (never trust those), I was just trying to find something quick that Zen's improvement is based from Excavator and not Piledriver .

@Orangey pretty sure I remember the architecture names being on the original slides.

 

[mmj_uk]

Like I said before IPC is a meaningless metric of overall performance without knowing the final clockspeed.

IPC stands for "Instructions per cycle", which means that even if Zen has a 40% higher IPC if there are 40% less cycles then it will execute the same number of instructions overall. I'm guessing AMD are using "instructions per clock" to not give the game away so obviously and feed the hype train.

I'd predict Zen to be clocked in the 3.5ghz region (pure speculation on my part) in which case you're looking at closer to 20% overall improvement per core since Excavator cores would be clocked in the 4-4.2ghz range.

 

[Orangey]

And the much-touted 14LPP is having problems with high frequencies.

 

[humbug]

And the much-touted 14LPP is having problems with high frequencies.

Is that speculation or fact?

 

[AllBodies]

And the much-touted 14LPP is having problems with high frequencies.

Source?

 

[humbug]

I remember a similar thing being said about Polaris 10.

People claiming to have inside information that AMD couldn't get P10 on 14nm LPP above 850Mhz.

Soon debunked by AMD's response and then proof of the RX 480 running at 1266Mhz at Computex.

There seems to be a lot of people claiming to be in the know with insider information making hyperbolic claims, like Kyle from HardCOP for instance, one of the people perpetuating that myth and many others citing "insider information"

You can't trust any of it.

 

[Ferrari100]

I remember a similar thing being said about Polaris 10.

People claiming to have inside information that AMD couldn't get P10 on 14nm LPP above 850Mhz.

Soon debunked by AMD's response and then proof of the RX 480 running at 1266Mhz at Computex.

There seems to be a lot of people claiming to be in the know with insider information making hyperbolic claims, like Kyle from HardCOP for instance, one of the people perpetuating that myth and many others citing "insider information"

You can't trust any of it.

I imagine these people to be the them who were previously able to get information and leak it.
Fortunately AMD are playing a much better game lately to keep people guessing. Exactly how they should be. When AMD want consumers to know, they will.

 

[kylew_is_back]

FX 9xxx at 4.7GHz get 113 Single Core Score in CINEBENCH R15
Ivybridge at 4.7GHz get 172 Single Core Score in CINEBENCH R15
Skylake at 4.7GHz get 204 Single Core Score in CINEBENCH R15

So if we calculate the ipc gains from the AMD graph (excavator 7.4% + zen 40%) then the IPC will almost match the ivybridge.

zen at 4.7GHz(*) will get 170 Single Core Score in CINEBENCH R15

(*) assuming that it can clock at this frequency

 

[AllBodies]

FX 9xxx at 4.7GHz get 113 Single Core Score in CINEBENCH R15
Ivybridge at 4.7GHz get 172 Single Core Score in CINEBENCH R15
Skylake at 4.7GHz get 204 Single Core Score in CINEBENCH R15

So if we calculate the ipc gains from the AMD graph (excavator 7.4% + zen 40%) then the IPC will almost match the ivybridge.

zen at 4.7GHz(*) will get 170 Single Core Score in CINEBENCH R15

(*) assuming that it can clock at this frequency

Isn't excavator quite a bit more than 7.4% over Piledriver?

I thought it was more like a 10% increase from Piledriver to Steamroller, and then a further 8% from Steamroller to Excavator.

 

[humbug]

Isn't excavator quite a bit more than 7.4% over Piledriver?

I thought it was more like a 10% increase from Piledriver to Steamroller, and then a further 8% from Steamroller to Excavator.

So did i.

Over the years AMD have been citing performance increases from Piledriver to Steamroller and most recently +20% IPC Excavator.

So now in this chat those past increases are, well, nothing really.

Where was that specific slide used? i have seen a slide like it but without the 7% Bulldozer to Excavator bit on it.