(Leak) AMD Vega 10 and Vega 20 Information Leaked
Subject: Graphics Cards | January 8, 2017 - 08:53 AM | Tim Verry
Tagged: vega 11, vega 10, navi, gpu, amd
During CES, AMD showed off demo machines running Ryzen CPUs and Vega graphics cards as well as gave the world a bit of information on the underlying architecture of Vega in an architectural preview that you can read about (or watch) here. AMD's Vega GPU is coming and it is poised to compete with NVIDIA on the high end (an area that has been left to NVIDIA for awhile now) in a big way.
Thanks to Videocardz, we have a bit more info on the products that we might see this year and what we can expect to see in the future. Specifically, the slides suggest that Vega 10 – the first GPUs to be based on the company's new architecture – may be available by the (end of) first half of 2017. Following that a dual GPU Vega 10 product is slated for a release in Q3 or Q4 of 2017 and a refreshed GPU based on smaller process node with more HBM2 memory called Vega 20 in the second half of 2018. The leaked slides also suggest that Navi (Vega's successor) might launch as soon as 2019 and will come in two variants called Navi 10 and Navi 11 (with Navi 11 being the smaller / less powerful GPU).
The 14nm Vega 10 GPU allegedly offers up 64 NCUs and as much as 12 TFLOPS of single precision and 750 GFLOPS of double precision compute performance respectively. Half precision performance is twice that of FP32 at 24 TFLOPS (which would be good for things like machine learning). The NCUs allegedly run FP16 at 2x and DPFP at 1/16. If each NCU has 64 shaders like Polaris 10 and other GCN GPUs, then we are looking at a top-end Vega 10 chip having 4096 shaders which rivals that of Fiji. Further, Vega 10 supposedly has a TDP up to 225 watts.
For comparison, the 28nm 8.9 billion transistor Fiji-based R9 Fury X ran at 1050 MHz with a TDP of 275 watts and had a rated peak compute of 8.6 TFLOPS. While we do not know clock speeds of Vega 10, the numbers suggest that AMD has been able to clock the GPU much higher than Fiji while still using less power (and thus putting out less heat). This is possible with the move to the smaller process node, though I do wonder what yields will be like at first for the top end (and highest clocked) versions.
Vega 10 will be paired with two stacks of HBM2 memory on package which will offer 16GB of memory with memory bandwidth of 512 GB/s. The increase in memory bandwidth is thanks to the move to HBM2 from HBM (Fiji needed four HBM dies to hit 512 GB/s and had only 4GB).
The slide also hints at a "Vega 10 x2" in the second half of the year which is presumably a dual GPU product. The slide states that Vega 10 x2 will have four stacks of HBM2 (1TB/s) though it is not clear if they are simply adding the two stacks per GPU to claim the 1TB/s number or if both GPUs will have four stacks (this is unlikely though as there does not appear to be room on the package for two more stacks each and I am not sure if they could make the package bit enough to make room for them either). Even if we assume that they really mean 2x 512 GB/s per GPU (and maybe they can get more out of that in specific workloads across both) for memory bandwidth, the doubling of cores and at least potential compute performance will be big. This is going to be a big number crunching and machine learning card as well as for games of course. Clockspeeds will likely have to be much lower compared to the single GPU Vega 10 (especially with stated TDP of 300W) and workloads wont scale perfectly so potential compute performance will not be quite 2x but should still be a decent per-card boost.
Raja Koduri holds up a Vega GPU at CES 2017 via eTeknix
Moving into the second half of 2018, the leaked slides suggest that a Vega 20 GPU will be released based on a 7nm process node with 64 CUs and paired with four stacks of HBM2 for 16 GB or 32 GB of memory with 1TB/s of bandwidth. Interestingly, the shaders will be setup such that the GPU can still do half precision calculations at twice that of single precision, but will not take nearly the hit on double precision at Vega 10 at only 1/2 single precision rather than 1/16. The GPU(s) will use between 150W and 300W of power, and it seems these are set to be the real professional and workstation workhorses. A Vega 10 with 1/2 DPFP compute would hit 6 TFLOPS which is not bad (and it would hopefully be more than this due to faster clocks and architecture improvements).
Beyond that, the slides mention Navi's existence and that it will come in Navi 10 and Navi 11 but no other details were shared which makes sense as it is still far off.
You can see the leaked slides here. In all, it is an interesting look at potential Vega 10 and beyond GPUs but definitely keep in mind that this is leaked information and that the information allegedly came from an internal presentation that likely showed the graphics processors in their best possible/expect light. It does add a bit more hope to the fire of excitement for Vega though, and I hope that AMD pulls it off as my unlocked 6950 is no longer supported and it is only a matter of time before new games perform poorly or not at all!