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[pclab] Steamroller at a glance - Page 6

post #51 of 81
I just want steamroller within 10% of Ivy Bridge Single threaded performance then it will be great and AMD will be back on track. If bulldozer/piledriver performed in single threaded apps as well as they did in highly threaded apps there would be no dispute about it's performance IMO.
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post #52 of 81
Quote:
Originally Posted by Blackops_2 View Post

I just want steamroller within 10% of Ivy Bridge Single threaded performance

I think this is overly optimistic.

Unless Steamroller consistently (meaning averages, not simply reaching it in a handful of best case scenarios) achieves it's rumored 30% IPC improvement (and remember that this improvement is going to be most prominent in multi-threaded tasks), it's still going to fall well short of 10% slower than Ivy, in single threaded tasks, unless there is a very significant clock speed boost as well.

As a whole, I would expect the processors to be competitive with Ivy all-round, but expecting a giant leap in single threaded performance is simply far fetched. The single largest change is widening the decoder stage to better support the demands of both cores in a module. Single threaded gains are going to be more modest than heavily threaded ones.
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post #53 of 81
And also fixing cache latency, it was actually said somewhere that SR is to fix L3 cache latency
That was something bugging AMD procs since K10.5 and that's why Nehalem wins supreme over K10.5 is because of cache latency and it's still happening now
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post #54 of 81
Quote:
Originally Posted by Blameless View Post

I think this is overly optimistic.

Unless Steamroller consistently (meaning averages, not simply reaching it in a handful of best case scenarios) achieves it's rumored 30% IPC improvement (and remember that this improvement is going to be most prominent in multi-threaded tasks), it's still going to fall well short of 10% slower than Ivy, in single threaded tasks, unless there is a very significant clock speed boost as well.

As a whole, I would expect the processors to be competitive with Ivy all-round, but expecting a giant leap in single threaded performance is simply far fetched. The single largest change is widening the decoder stage to better support the demands of both cores in a module. Single threaded gains are going to be more modest than heavily threaded ones.

Extremely overly optimistic honestly. One can dream rolleyes.gif I do want AMD competing on both fronts though of single threaded and multi-threaded performance, it would be very nice to see competition in the CPU segment again. I mean that in the sense that AMD fields something that would force Intel to introduce mainstream hexa-cores.
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post #55 of 81
Quote:
Originally Posted by DaveLT View Post

And also fixing cache latency, it was actually said somewhere that SR is to fix L3 cache latency
That was something bugging AMD procs since K10.5 and that's why Nehalem wins supreme over K10.5 is because of cache latency and it's still happening now

It was said that L3 high latency causation was isolated, but fixing it is not a priority, so it's likely we won't see a fix until Excavator.
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post #56 of 81
Quote:
Originally Posted by Stay Puft View Post

Quote:
Originally Posted by sugarhell View Post

Its funny how much you bashed titan for its price

Ofcourse i did because its a freaking ripoff at a thousand dollars. I have a baby on the way and a new house so i cant just drop $$$ on every new part like i used too.

Titan should have been the 780 at 499.99 but i understand where nvidia is coming from. Profit margins is all that matters in big business.

Maybe the Titan XL or Titan ULTRA will be renamed the GTX 780 FTW and i will buy it.
 
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post #57 of 81
Quote:
Originally Posted by Blameless View Post

As a whole, I would expect the processors to be competitive with Ivy all-round, but expecting a giant leap in single threaded performance is simply far fetched. The single largest change is widening the decoder stage to better support the demands of both cores in a module. Single threaded gains are going to be more modest than heavily threaded ones.

Single-thread IPC would be probably be helped out more by the reduction in branch misprediction rather than the decode widening, yes?
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post #58 of 81
I honestly think that IPC will be improved well enough to be competitive with Ivy and it will suit my plans of upgrading at Steamroller. Even Vishera would be sufficient, really.
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post #59 of 81
Quote:
Originally Posted by Jinholic View Post

People just like to cry about things they've only tried once and never give them a second chance just go look at newegg reviews...

But really I am hoping AMD drops the power consumption so their stuff doesn't run as hot and while I know its not a big difference I live in the US southwest and its hot and dry as all hell here. Doesn't help my room is on a bad side for sun making it at least 5° hotter in here, I've got fans going everywhere its madness.

Honestly, I'd be surprised if half the people here who comment on AMDs performance have seen a high-end AMD chip in action...Or one without something else that makes its performance look lacklustre. (ie. Blaming low FPS on the FX-8350 instead of its GT430)
Quote:
Originally Posted by Blameless View Post

I think this is overly optimistic.

Unless Steamroller consistently (meaning averages, not simply reaching it in a handful of best case scenarios) achieves it's rumored 30% IPC improvement (and remember that this improvement is going to be most prominent in multi-threaded tasks), it's still going to fall well short of 10% slower than Ivy, in single threaded tasks, unless there is a very significant clock speed boost as well.

As a whole, I would expect the processors to be competitive with Ivy all-round, but expecting a giant leap in single threaded performance is simply far fetched. The single largest change is widening the decoder stage to better support the demands of both cores in a module. Single threaded gains are going to be more modest than heavily threaded ones.

The 30% came from AMDs slides iirc, and that was for single-threaded performance...Multi-threaded performance would be even higher. I'm not saying they're true, but that's where they came from.
Quote:
Originally Posted by DaveLT View Post

And also fixing cache latency, it was actually said somewhere that SR is to fix L3 cache latency
That was something bugging AMD procs since K10.5 and that's why Nehalem wins supreme over K10.5 is because of cache latency and it's still happening now

That's Excavator that gets the L3 cache fixes, it also gets improved libraries which (afaik) means that it'll be much more die-size efficient...which is why that whole "AMD is on 28nm vs Intels 14nm, they'll die!" remark is completely false, AMD got these improved libraries from their graphics division and it seems to pretty nice from what I've read.
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post #60 of 81
Quote:
Originally Posted by Brutuz View Post

Honestly, I'd be surprised if half the people here who comment on AMDs performance have seen a high-end AMD chip in action...Or one without something else that makes its performance look lacklustre. (ie. Blaming low FPS on the FX-8350 instead of its GT430)

The truth!! It BURNS!!! Seriously, so much this. To this day, my IT teacher still believes the processor inside my Trinity AIO is an i5 or an i7. He flat out refuses to believe that an €110 CPU+GPU can be so responsive and fast.

(He did believe it upon seeing CPU-Z... But he is still genuinely amazed at how fast it is, and so am I)
Quote:
Originally Posted by Brutuz View Post

The 30% came from AMDs slides iirc, and that was for single-threaded performance...Multi-threaded performance would be even higher. I'm not saying they're true, but that's where they came from.
That's Excavator that gets the L3 cache fixes, it also gets improved libraries which (afaik) means that it'll be much more die-size efficient...which is why that whole "AMD is on 28nm vs Intels 14nm, they'll die!" remark is completely false, AMD got these improved libraries from their graphics division and it seems to pretty nice from what I've read.

Woah, I didn't know this. Seems like they are going several things at a time instead of rushing it and changing too much in too little.

So in the end, by Excavator, we will have fixed L3 cache, individual decoders, souped up FPUs, a uop queue, throttable L2 cache, and vastly improved shift registers?

We will basically have a new architecture then!! lachen.gif
   
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