Vega/Navi Rumors (Updated)

[PeterScott]

I think it's AIB versions on the 28th.

We find out in 2 days. This is what I read:
http://www.shacknews.com/article/100938/amd-reportedly-pushes-rx-vega-56-embargo-forward

Burke goes on to reveal the expected embargo scheduled for the RX Vega line:

• Unboxing embargo lift on Saturday, August 12, 11AM EDT: AMD permits unboxing photos or videos only.
• Performance embargo lift for Vega 56 on August 14, 9AM EDT.
• RX Vega 64 already in hands of some reviewers, with unboxing embargo lift on Saturday, August 12, 11AM EDT.
• RX Vega 64 performance embargo lift on August 14, 9AM EDT.
• Vega 56 launches on 8/28.

 

[Crumpet]

We find out in 2 days. This is what I read:
http://www.shacknews.com/article/100938/amd-reportedly-pushes-rx-vega-56-embargo-forward

Ah the fabled and likely notorious Gamer's Nexus meltdown post.

It will be indeed interesting to see if it rings true.

 

[Yakk]

Nope.... 14th everything is let loose.


Check bottom of page.... https://sapphirenation.net/sapphire-radeon-vega/?utm_source=newsletter

Thanks.

 

[Crumpet]

AdoredTV testing Vega 64 Liquid edition;

Just to stop all the "lelelel 1000w" circlejerking.

 

[Konan]

^ whats the difference with the "Reviewer's Edition" and a normal edition?

 

[Yakk]

^ whats the difference with the "Reviewer's Edition" and a normal edition?

Extra swag in the box it looks like.

Edit : also looks like different reviewers received different versions of the card. Some got a standard card like Guru3D, others limited edition air, and others like AdoredTV got the limited edition water cooled version.

 

[Konan]

^ no cherry picked perfect cards?

 

[Crumpet]

^ no cherry picked perfect cards?

Unlikely, guess we'll find out on Monday.

 

[Kenmitch]

^ no cherry picked perfect cards?

Nope....Got lost in the translation so they let Sherri pick them.

 

[Shamrock]

How long do you think it will be for aftermarket 3rd party cards? Like the Sapphire Tri-X OC? I'd be interested in one of those for Vega 56.

 

[Elixer]

How long do you think it will be for aftermarket 3rd party cards? Like the Sapphire Tri-X OC? I'd be interested in one of those for Vega 56.

Sometime in September.

 

[Tup3x]

You have answered why, but you have not answered what is defining performance per clock for GPUs.

And it is core throughput, and graphics capabilities, of each architecture.


How do you explain that in fact, Nvidia GPUs have longer pipeline that can clock higher but can do less work each cycle than AMD GPUs can?

Nvidia has 32 KB Warp, that is executed by 128 cores/256 KB Register File size, in Maxwell and Pascal architectures.
AMD has 64 KB wavefront that is executed by 64 cores/256 KB Register file size in every single GCN generation since GCN1. All what has changed in GCN since that time, is graphics capabilities. Nvidia changed core throughput, by reducing the number of cores per 256 KB Register File size, which made them less starved for resources. This is why we have seen zero improvement in core for core performance in compute applicatins, but we have seen improvement core for core in both gaming and compute with shift from Kepler to Maxwell.

Where bottleneck is for GCN in graphics throughput - Registering triangles. Each cycle you can register 4 triangles with 4 geometry engines. GP102 can register 6 triangles each clock with 6 GPC's(Each GPC has 1 Geometry Engine). Vega is lifting this bottleneck with Programmable Geometry Pipeline, which can register up to 11 triangles each clock with 4 geometry engines.

AMD lifted a lot of bottlenecks in Vega. But it will take time, before the software will mature.

Apparently that's not the case though. If something sounds too goof to be true, it usually is.

 

[Glo.]

http://radeon.com/_downloads/vega-whitepaper-11.6.17.pdf

Vega whitepaper:

Next-generation geometry engine To meet the needs of both professional graphics and gaming applications, the geometry engines in “Vega” have been tuned for higher polygon throughput by adding new fast paths through the hardware and by avoiding unnecessary processing. This next-generation geometry (NGG) path is much more flexible and programmable than before. To highlight one of the innovations in the new geometry engine, primitive shaders are a key element in its ability to achieve much higher polygon throughput per transistor. Previous hardware mapped quite closely to the standard Direct3D rendering pipeline, with several stages including input assembly, vertex shading, hull shading, tessellation, domain shading, and geometry shading. Given the wide variety of rendering technologies now being implemented by developers, however, including all of these stages isn’t always the most efficient way of doing things. Each stage has various restrictions on inputs and outputs that may have been necessary for earlier GPU designs, but such restrictions aren’t always needed on today’s more flexible hardware.

Very interesting read.

 

[ElFenix]

Considering we've got Vega in the full light of day now and Navi news is a bit sparse in comparison, we're locking this thread. Please use the Vega review thread for Vega discussion.

AT Moderator ElFenix