Vega/Navi Rumors (Updated)

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Konan

Senior member
Jul 28, 2017
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I skimmed a few places for 1070 benchmarks on similar equipment and those in that leak to compare against seem a bit on the lower side.
 

insertcarehere

Senior member
Jan 17, 2013
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Thats in gtx1080 territory. So what will vega 64 be in relation to the 1080? I seriously hope the figures are true, it will certainly kick the competition into high gear. If so, I can foresee Nvidia rushing out Volta earlier than expected.

There's a good chance that full vega might be thermal/ROP whatever bottlenecked so don't get your hopes up...
 

Elixer

Lifer
May 7, 2002
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Thats in gtx1080 territory. So what will vega 64 be in relation to the 1080? I seriously hope the figures are true, it will certainly kick the competition into high gear. If so, I can foresee Nvidia rushing out Volta earlier than expected.
More than likely, price cuts, if true, and that is a big if.
 

Mopetar

Diamond Member
Jan 31, 2011
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I skimmed a few places for 1070 benchmarks on similar equipment and those in that leak to compare against seem a bit on the lower side.

I did some looking as well and the 1070 numbers look like minimum or .1% low numbers.

The Vega averages might not be that much better. HBCC was supposed to give Vega better lows but that may not guarantee the average is similarly better.
 

HurleyBird

Platinum Member
Apr 22, 2003
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PC Gamer Vega article author -

I'm doubtful that AMD would have purposefully under-reported performance at the Capsaicin event. It's almost impossible to think of a reason they'd want to do that. If there is some performance boost at launch versus the event, it will be because the driver team has been frantically working to boost performance in the meantime.

Regardless, I wouldn't recommend buying one of these close to launch. The higher the performance AMD can eke out of the drivers at the 11th hour, the less stable I expect them to be. I still remember the absolute horror show that the GTX 980/970 launch drivers turned out to be (they bricked my Windows installation!) While I doubt we'll see anything that bad, and AMD isn't Nvidia, similar principles still exist.
 
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Paratus

Lifer
Jun 4, 2004
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Well that's positive. I was wondering if Vega 56 might be a decent card to get. Since I'm replacing my entire rig this year, (circa 2003 coolermaster case included ) maybe it makes sense to save some money and get the 56 now. Then see how things pan out and replace it with Navi or Volta (or subsequent card) late next year.

If an AIB Vega 56 comes with 2X 8pin I bet OC'ing to Vega 64 core and mem or above levels might be possible.

Hmm
 

swilli89

Golden Member
Mar 23, 2010
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I should have added. "In Theory".

Remember Intel complaining that it's competitors node names were bullshit? This is what it is all about.

The intention of Node Names were that full Nodes were to be double transistor density so ~.7 linear scaling.

But marketing departments have got too involved in the naming process, and thus we get a lot of fudging of supposed full node advances.

Do you have link where Samsung claims that. I would love to see in writing where they admit that 2 full Marketing nodes is only equal to one real node.
http://www.samsung.com/semiconductor/foundry/process-technology/14nm/

^Literally first link when I googled "Samsung 14nm lpp"
 

PeterScott

Platinum Member
Jul 7, 2017
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http://www.samsung.com/semiconductor/foundry/process-technology/14nm/

^Literally first link when I googled "Samsung 14nm lpp"

That's pathetic. Intel is doing better than that on one node, than Samsung did on two.

Which justifies Intels complaints about their competitors process size claims.

Here is what proper node advancement looks like:


Intel has more than doubled density at each node step. Though 22->14 is 1.5 nodes, but it gives the proper 2.5X scaling (If I did my calcs correct). The big winner is 14nm-10nm, 1 node and bigger than 2.5X jump in transistors.

https://semiengineering.com/10nm-versus-7nm/
“Not all 10nm technologies are the same,” said Mark Bohr, a senior fellow and director of process architecture and integration at Intel. “It’s now becoming clear that what other companies call a ‘10nm’ technology will not be as dense as Intel’s 10nm technology. We expect that what others call ‘7nm’ will be close to Intel’s 10nm technology for density.”

It wasn’t always like that. Traditionally, chipmakers scaled the key transistor specs by 0.7X at each node. This, in turn, roughly doubles the transistor density at each node.

Intel continues to follow this formula. At 16nm/14nm, though, others deviated from the equation from a density standpoint. For example, foundry vendors introduced finFETs at 16nm/14nm, but it incorporated a 20nm interconnect scheme.

Technically, the foundries didn’t introduce finFETs at a full node (14nm), but rather at a half node. TSMC, for one, calls it 16nm.

Still, foundries found a way to provide value to their customers at 16nm/14nm. “Foundries are less fixed on sticking to a 0.7X pitch shrink per node and more on providing their customers with some combination of power, performance, area and cost benefit at a half-node cadence,” said Mike Chudzik, senior director of strategic planning at Applied Materials
 
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96Firebird

Diamond Member
Nov 8, 2010
5,712
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Has anyone else taken a look at some of the posts of the past in this thread? There are some real gems, especially around March/April of this year. Mockingbird might have been on to something when he claimed Vega was postponed indefinitely back then, but then there are also statements from AMD's global marking manager stating "It looks really nice" with respect to Vega's performance compared to GP102.

I'd like to think the history of hyping up these products won't repeat itself, yet again, but we all know it'll happen again.
 

Paul98

Diamond Member
Jan 31, 2010
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What did cpu benchmarks look like in game with Vega FE? I was looking around but didn't see any tests, anyone know which review might have had that bench in it?
 

Paratus

Lifer
Jun 4, 2004
16,848
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That's pathetic. Intel is doing better than that on one node, than Samsung did on two.

Which justifies Intels complaints about their competitors process size claims.

Here is what proper node advancement looks like:


Intel has more than doubled density at each node step. Though 22->14 is 1.5 nodes, but it gives the proper 2.5X scaling (If I did my calcs correct). The big winner is 14nm-10nm, 1 node and bigger than 2.5X jump in transistors.

https://semiengineering.com/10nm-versus-7nm/

Interesting

Fury hit 14.9 MTr/mm^2 on 28nm which was equal to Intels 22nm (they increased density by 22% from Tahiti)

Vega on the other hand is at 25.8 MTr/mm^2 which is quite a bit lower than Intels 14nm. (So far AMD has only increased density by about 4-5% from Polaris on the current node)

So Intels 14nm is a good 45% more dense.
 

maddie

Diamond Member
Jul 18, 2010
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That's pathetic. Intel is doing better than that on one node, than Samsung did on two.

Which justifies Intels complaints about their competitors process size claims.

Here is what proper node advancement looks like:


Intel has more than doubled density at each node step. Though 22->14 is 1.5 nodes, but it gives the proper 2.5X scaling (If I did my calcs correct). The big winner is 14nm-10nm, 1 node and bigger than 2.5X jump in transistors.

https://semiengineering.com/10nm-versus-7nm/
Lets see here.


Year 2016
14nm
Core i7-6950X
246mm^2
3,200 million transistors

Ta Da:
13 MTr/mm^2

Interesting

Fury hit 14.9 MTr/mm^2 on 28nm which was equal to Intels 22nm (they increased density by 22% from Tahiti)

Vega on the other hand is at 25.8 MTr/mm^2 which is quite a bit lower than Intels 14nm. (So far AMD has only increased density by about 4-5% from Polaris on the current node)

So Intels 14nm is a good 45% more dense.
See above to rethink conclusion.
 

Paratus

Lifer
Jun 4, 2004
16,848
13,784
146
Lets see here.


Year 2016
14nm
Core i7-6950X
246mm^2
3,200 million transistors

Ta Da:
13 MTr/mm^2


See above to rethink conclusion.

Well let's check, because CPU <> GPU.

Ryzen is 4.8B with 195mm^2 for 24.6MTr/mm^2

So maybe CPU does = GPU.

That would suggest Intel is coming no where close the theoretical density of their process which is probably based on the size of an SRAM cell.
 
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majord

Senior member
Jul 26, 2015
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In thinking about potential bottlenecks and whatnot I had a bit of a play with bandwidth numbers..

I know.. boost clocks aren't always reached, and TF does not equal frames/s throughput.. but it's the only metric of shader power and as we know, there's not a great deal of difference between GCN revisions in this regard.. only delta color compression has improved. Which brings me to the point of Vega having no mention of any improvement over Polaris.

So when you look at bandwidth per TF of raw shader power it gets interesting: Highlighted the stand-out comparisons:

GCN 3 2nd gen DCC :

R9 380X: 45.9GBs/TF
FURY X: 59.5GBs/TF
A12 9800 Bristol ridge APU: 33.9GB/s (shared w/ CPU)

GCN4 3rd gen DCC:

rx 580 41.4GBs /TF
rx 480 44.1GBs/TF
rx 560 42.8GBs/TF

GCN5 3rd gen DCC????

Vega 56 39GBs/TF
Vega 64 air 38.1GBs/TF
Vega 64 liq 35.1GBs/TF


So at max boost, Vega64 liquid has near half the bandwidth per TF of shader power than Fiji. and barely more than a Bristol ridge APU, notwithstanding the APU shares its bw of course, but an interesting pt of reference perhaps..

thoughts?
 
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beginner99

Diamond Member
Jun 2, 2009
5,223
1,598
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thoughts?

Agree. Recent AMD cards have mostly been memory bandwidth starved probably to save cost.

If the benches of the 56 version in this thread are correct, it's probably the card to get. Apply a memory OC and it should come close to full version.
Vega certainly has at least 1 huge bottleneck affecting gaming and it certainly could be memory bandwidth as the memory operates slower than was planned and hence the chip designed for.
 
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