The features of AMD’s upcoming Radeon RX 500 Series Vega architecture have been discovered in the code of the just launched ve.ga teaser site and they’re incredibly impressive. The company’s upcoming next generation Vega graphics architecture is due for a major preview at CES on Thursday, less than three days away.
However, thanks to our crafty friends over at 3DCenter who have managed to dig up some major yet unreleased details regarding the brand new architecture you don’t have to wait one more minute. All the details have been pulled from within the code-base of the Vega teaser website, ve.ga. Which not only makes this the biggest Vega leak yet, it also makes it the most significant because of its impeccable authenticity and accuracy. So without any further delay, let’s get to the juicy bits!
Vega, AMD’s Most Advanced & Most Impressive Graphics Architecture To Date
Vega Architecture ( Compard to Polaris )
– 4x Power Efficiency
– 2x Peak Throughput/Performance Per Clock
– High Bandwidth Cache
– 2x Bandwidth per pin
– 8x Capacity Per stack ( 2nd Generation High Bandwidth Memory )
– 512TB Virtual Address Space
– Next Generation Compute Engine
– Next Generation Pixel Engine
– Next Compute Unit Architecture
– Rapid Packed Math
– Draw Stream Binning Rasterizer
– Primitive Shaders
Vega’s Next Compute Unit (NCU), 2x Peak Throughput per Clock And 4x The Power Efficiency
According to the newly dug up data Vega delivers four times the graphics performance compared to Polaris at the same power. There isn’t much detail to expand upon in terms of the context here. However, it’s very clear that AMD is referring to half precision compute. Which would mean that Vega delivers double the single precision compute at the same power compared to Polaris.
This is the most impressive figure of the bunch. Doubling the power efficiency of a graphics architecture whilst maintaining or boosting performance is an incredibly challenging engineering feat. One that’s made even harder in the case of Vega considering that it is built on the same 14nm manufacturing process as Polaris. If it stands true then AMD engineers will have pulled nothing short of a miracle.
2x peak throughput/clock is another impressive figure that stands as a testament to how radically different Vega is compared to Polaris as an architecture. It means that Vega will deliver double the performance of Polaris at any given clock speed.
High Bandwidth Cache, 8x Capacity Per Stack, 2x Bandwidth Per Pin And 512TB Address Space
These specs and features are specific to Vega’s second generation High Bandwidth Memory technology. HBM2 offers 8x the capacity per stack compared to first generation HBM and twice the bandwidth per stack thanks to a higher clock speed. First generation HBM found in AMD’s Fury series of enthusiast graphics cards features a maximum of 1GB capacity per stack and 128GB/s of bandwidth per stack.
Second generation HBM comes in stacks of up to 8GB and 256GB/s of bandwidth. Interestingly, the Vega engineering sample that AMD demoed last month was actually an 8GB model with 512GB/s of bandwidth. Which would indicate that it was equipped with two 4GB HBM2 stacks, each delivering 256GB/s of bandwidth, rather than a single 8GB stack. However, the Radeon Instinct MI25 deep-learning accelerator based on the same Vega GPU features 16GB of memory and 512GB/s of bandwidth. Which means that AMD had to equip it with two 8GB stacks.
Each HBM stack connects to the GPU via a 1024bit memory controller. HBM2 comes out of the factory clocked at double the frequency of first generation HBM. Which is how it delivers double the bandwidth per pin. The 512TB virtual address space feature is quite an interesting one and is likely achieved by quickly swapping data in and out of the HBM cache.
A New Top-To-Bottom Range Of Radeon RX 500 Series Graphics Cards Based On The Vega Architecture
AMD will be rolling out its next generation Vega architecture across the entire range of its 2017 Radeon graphics cards and it’ll do it “soon”. The new lineup will span a top-end 4K 60FPS triple A gaming Radeon graphics card, the very same one that was demoed last week, to mid-range and entry level offerings for 1440p and 1080p gaming. The highest end models will feature HBM2 whilst the mid-range and more budget oriented cards will feature GDDR5/X memory.
We’ve already seen one upcoming Radeon graphics card based on Vega in action. The yet unreleased graphics card was demoed in a head-to-head comparison with Nvidia’s GTX 1080. The demo Vega graphics card had 8GB of HBM2 and it outperformed the 1080 by 10% whilst running Doom in Vulkan at 4K.