AMD right now launched the Radeon RX 6800, 6800 XT, and 6900 XT graphics playing cards based mostly on its newest RDNA 2 structure. With a launch date in November and costs beginning at $580, AMD is aiming to compete straight with NVIDIA’s newest 30-series GPUs. And—higher late than by no means—the RX 6000-series playing cards embrace a USB-C port to “energy head-mounted shows with only one cable for a contemporary VR expertise.”
Earlier than we dive into particulars, right here’s the discharge date, worth, and primary specs of every card:RX 6900 XT RX 6800 XT RX 6800 Worth $1,000 $650 $580 Launch Date December eighth, 2020 November 18th, 2020 Compute Items 80 72 60 Recreation Clock (GHz) 2.02 2.02 1.82 Increase Clock (GHz) 2.25 2.25 2.11 Reminiscence (GDDR6) 16GB Connectors DisplayPort 1.four w/ DSC*, HDMI 2.2 w/ VRR*, USB-C* 2x DisplayPort 1.four w/ DSC, 1x HDMI 2.2 w/ VRR, 1x USB-C * connector counts unspecified
See an in depth spec comparability right here
Based mostly on its new RDNA 2 structure, AMD is positioning its 6000-series playing cards to compete straight with Nvida’s newest 30-series GPUs in worth, efficiency, and options.
Infinity Cache, Ray-tracing, and Good Entry Reminiscence
New to the 6000-series playing cards, ‘Infinity Cache’ is 128MB of reminiscence straight on the GPU die. AMD says the cache acts as a “bandwidth amplifier” for the remainder of the cardboard’s reminiscence; 16GB of GDDR6 mixed with the 128MB Infinity Cache will increase “efficient bandwidth” by as much as three.25 instances in comparison with the identical quantity of reminiscence with out the cache.
“This international cache is seen by your complete graphics core, capturing temporal re-use and enabling information to be accessed instantaneously. Leveraging the very best excessive frequency approaches from Zen structure, AMD Infinity Cache permits scalable efficiency for the long run,” the corporate explains.
The 6000-series playing cards additionally introduce accelerated ray-tracing with one ‘Ray Accelerator’ per Compute Unit. The cardboard’s ray-tracing tech relies on the DirectX 12 Final implementation; AMD says builders can combine and match rasterization and ray-tracing results, with “an order of magnitude” enchancment in ray-tracing operations in comparison with the final era of Radeon playing cards.Picture courtesy AMD
The corporate can also be introducing a singular function for customers who pair AMD’s 6000-series GPUs with the corporate’s personal 5000-series Ryzen CPUs. Referred to as Good Entry Reminiscence, the corporate says the function permits the CPU to entry extra of the GPUs reminiscence directly, leading to a efficiency enhance of some proportion factors relying upon the title. Whereas not a groundbreaking change in efficiency by itself, it’s basically ‘free’ (when you have the appropriate mixture of ), and a wise option to leverage the corporate’s broader portfolio.
A VirtualLink to the Previous
AMD’s personal variations of the Radeon RX 6000-series playing cards embrace USB-C throughout the board, which, for VR specifically, would permit the playing cards to assist the VirtualLink customary—a USB-C ‘alt-mode’ which was designed to offer VR headsets with information, energy, and video by a single port.
Certainly, the corporate’s advertising and marketing says the port can “energy head-mounted shows with only one cable for a contemporary VR expertise,” although the timing is fairly odd on condition that the VirtualLink customary was initially launched in 2018 and has since been deserted. On the flip aspect, Nvidia was early with assist for VirtuaLink by together with USB-C ports on its first wave of RTX 20-series GPUs, solely to eschew the facility on the most recent 30-series playing cards.
Nonetheless, so far as we all know, a USB-C port on the RX 6000-series playing cards ought to imply that VirtualLink units might work simply fantastic, and headset makers might at all times devise their very own single-cable headset connection based mostly on the cardboard’s USB-C port.
Variable Charge ShadingPicture courtesy AMD
The RDNA 2 structure of the 6000-series GPUs additionally supportS Variable Charge Shading which permits fine-grain management over the shading price from one body to the following. This can be utilized to basically decrease the decision of some components of the scene (say darkish areas or these with out a lot element) whereas sustaining full decision in essential, or excessive element components of the scene.
For VR headsets particularly, the Variable Charge Shading function opens the door to extra exact foveated rendering, which could possibly be static (to match lens distortion) or energetic (to align with eye motion). AMD hasn’t proven its personal VR-specific resolution (like Nvidia’s Variable Charge Supersampling) however the underlying tech to assist this type of foveation is there underneath the hood.
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We’ll be trying ahead to getting our palms on AMD’s 6000-series playing cards to see how they deal with upcoming high-resolution headsets like HP’s Reverb G2 and reminiscence hungry video games like Microsoft Flight Simulator (2020).
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