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post #3321 of 3492
Quote:
Originally Posted by Kuivamaa View Post

"In its last conference call, AMD’s Lisu Su, VP and General Manager of Global Business Units, told David Wong of Wells Fargo that, “we are 28 this year, we have 20-nanometer in design, and then FinFET thereafter.” Looking at that timeline above, it’s obvious that AMD needs to already be thinking about its 14nm designs — especially since 14nm will be the big leap from current 28nm chips — but the architecture probably isn’t at a stage where GF’s roadmap shift will harm AMD’s ability to execute."

http://www.extremetech.com/computing/181136-samsung-and-globalfoundries-buddy-up-for-14nm-while-ibm-heads-for-the-exit

I suppose "FinFET thereafter" is 14nm although Samsung's 14nm is probably different to what GloFo originally planned or what TSMC is preparing. In any case, Carrizo on 28nm is probably a last resort, AMD most likely had it planned for 20nm or lower but, well, GloFo obviously didn't deliver the goods.

Thanks, wasn't aware of that. 20nm in design though makes me think mid 2016 product releases.
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post #3322 of 3492
Did the measurements;

Tahiti CU: ~5.7 mm² / 2CU: ~11.4 mm²

So to shrink Tahiti's CUs into Kaveri the math is; Old die area * sqr((New CPP / 4) / (Old CPP / 4)) = New die area

My inexact measure of Kaveri's CU is ~7.1 mm²

126 nm to 100 nm:

1 CU: ~5.7 mm² * sqr((100 ÷ 4) / (126 ÷ 4)) => ~3.59 mm²
2 CU ~11.4 mm² * sqr((100 ÷ 4) / (126 ÷ 4)) => ~7.18 mm²

Doing a more exact measurement: ~7.64 mm², I had the image dimensions off which lead to 0.54 mm² loss.

120 nm to 100 nm:

1 CU: ~5.7 mm² * sqr((100 ÷ 4) / (130 ÷ 4)) => ~3.96 mm²
2 CU ~11.4 mm² * sqr((100 ÷ 4) / (130 ÷ 4)) => ~7.92 mm²

There is an oddity that most people out right lie; Kaveri's GCN L2 cache is 64KB but it is coherent to SR's L2 Cache and to Memory via IOMMU.

Tahiti has 8 RBEs to 6 128KB L2 caches
Hawaii has 16 RBEs to 8 128KB L2 caches
Kaveri has 4 RBEs to 2 64KB L2 caches

There is one transistor cost saver. AMD made something that would cost ~2.15 billion transistors(Tahiti halfed) to cost only ~1.75 billion transistors, the missing ~400 million transistors are all cost saving based.
Edited by Seronx - 4/29/14 at 5:30am
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post #3323 of 3492
Sorry for double posting;



Just felt like posting this here since I already did so on SA. If I get more complaints I'll go by a unit basis since I understand what happened.

The imgur shot is by hand and the Kaveri Steamroller is synthetic.


^-- the blurring is because they converted everything into synthetic macros.

Jaguar - 5 unique macros
Bobcat - 12 unique macros
SteamrollerB - 63 unique macros

The design is no longer fully made by hand thus you can't tell what part is what.


^Unless you have something like this.

The computer wasn't that great in rearranging the units so the gist is that it is flipped except for the cache unit. I expect later nodes to be even harder to tell the improvements.

--
The more interesting things I have noticed while analyzing SteamrollerB;
Each L1D has two LSU interfaces
While the L1 DTLB/L2 DTLB area is two times as big.
The FPU is two times as small but has the same amount of units. It's most likely HDL because why not?

Most if not everything on the die is blurred or hidden so having the Imgur shot helped a lot.
Edited by Seronx - 5/9/14 at 4:28pm
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post #3324 of 3492
I haven't seen this posted. Is that really official?

http://www.techknowbase.com/amd-fx-processors-steamroller-cores-2014/

be cause i hope it is not..
post #3325 of 3492
Quote:
Originally Posted by Pro3ootector View Post

I haven't seen this posted. Is that really official?

http://www.techknowbase.com/amd-fx-processors-steamroller-cores-2014/

be cause i hope it is not..

likely the next FX chip will actually be an APU. which means socket change to FM2+ or FM+ Unless there is a heck of a suprise waiting..
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post #3326 of 3492
Quote:
Originally Posted by Pro3ootector View Post

I haven't seen this posted. Is that really official?

http://www.techknowbase.com/amd-fx-processors-steamroller-cores-2014/

be cause i hope it is not..
It's obvious you have not been following AMD neww for a while. This has been readily known since last November at the APU '13 Conference.
post #3327 of 3492
Yep AMD has pretty much abandoned the performance CPU segment. Intel is all we have left now. Thats why Ill most likely be jumping to Intel for the first time since 2001 when the Haswell K refresh comes out next month. I had been holding out on refreshing my rig hoping something from AMD would come up on the horizon for us PC hardcores but Ive finally accepted the truth that there wont be at least for another couple years. sad-smiley-002.gif
post #3328 of 3492
Quote:
Originally Posted by MacLeod View Post

Yep AMD has pretty much abandoned the performance CPU segment. Intel is all we have left now. Thats why Ill most likely be jumping to Intel for the first time since 2001 when the Haswell K refresh comes out next month. I had been holding out on refreshing my rig hoping something from AMD would come up on the horizon for us PC hardcores but Ive finally accepted the truth that there wont be at least for another couple years. sad-smiley-002.gif

Did the same thing. Traded my buddy my Fx-8350 and 990fx mobo plus $200 for his 3770k and Asus Maximus mobo. Been very happy with the results so far.
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post #3329 of 3492
Only thing that makes me hesitate is I just reinstalled my OS when I bought my Evo SSD and it was kind of a pain to get all my games back and everything especially with Origin. Thinking about having to do all that again makes me want to just take the easy way out and just drop an 8350 in there and then overclock its guts out. Maybe get a new PSU to replace my aging TX750 too. I dont know yet. Disappointment vs laziness. Hmmmmm......
post #3330 of 3492
Keller stated in an interview with Rage3D that “AMD are on track to catch up on high performance cores”, so he is confident that the performance gap will not be around for very long.

http://news.softpedia.com/news/K7-K8-Inventor-Back-at-AMD-Prepares-Excavator-for-2015-441617.shtml

Jim Keller is also the creator of a A6/A7 chips form Apple. He is the "FX" man.

They are not giving up on high performence cpu cores devil.gif
Edited by Pro3ootector - 5/18/14 at 5:32am
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