Let’s continue our discovery of the refresh proposed by AMDat the risk of spoiling you slightly, AMD planned three maps for its refresh, the RX 6650 XT, 6750XT and 6950XT. Presently, we are going to dwell on the RX 6750 XT, with the same haunting question in mind, does this evolution mean a farewell to the RDNA2 architecture, or is it an extension of the architecture’s existence? We have the chance to test the RX 6750 XT ROG STRIX GAMING ofASUS, which offers a 1619 Mhz GPU, base and a 2739 Mhz Boost, the memory is 2250 Mhz. The card embeds 2560 shaders, 160 TMUs and 64 ROPs.
We are going to address the question of the architecture of its new RX 6000 graphics cards from AMD, the architecture that drives them is called RDNA2, this name is vocative, it is an evolution of the RDNA architecture, present in the RX 5000s. The RDNA architecture was a profound change compared to the Polaris architecture, we then went from a GCN type architecture, for Graphics Core Next, to an RNDA type architecture, for Radeon DNA. RDNA2 is therefore close to what we discovered with RDNA. The base of the GPU is made up of Compute Units, which are moreover grouped into Dual Compute Units. Each Shader Engine has 10 Dual Compute Units and its own L1 cache. At the center of the GPU, we find the Geometry Processor, the Graphic Command Processor, the ACEs (which manage Compute tasks), but we also now find the L2 cache, its position is no longer the same in the RDNA 2 architecture, because AMD has implemented the Infinity Cache, a specific cache of 128 MB, whose mission is to increase the bandwidth between the GDDR6 memory chips and the GPU. AMD estimates that GDDR6 memory, 256-bit interfaces, coupled with the Infinity Cache allows a bandwidth multiplied by 2.17 compared to GDDR6 memory, 256-bit interfaces, alone. The second major innovation lies in the presence of Ray Accelerator units, they are dedicated to the management of Ray Tracing technology and a unit is present in each CU. An RX 6800 therefore has 60 AR, the RX 6800 XT has 72 AR and the RX 6900 XT has 80 AR. By extension, we can understand that next-gen consoles, also based on an RDNA2 architecture, offer 32 AR, for the PS5 and 52 AR, for the Xbox Series X. This will allow us to better understand the difference in power between our computers and the new consoles.
The RDNA2 architecture is still engraved in 7nm, with now 26.7 billion transistors, compared to 10.3 billion transistors for the RX 5000s. The RX 6000s also still benefit from a PCI-e 4.0 interface, like the RX 5000s. 6000 opt for GDDR6 memory, on the first three models announced, RX 6800, 6800 XT and 6900 XT, the quantity is identical to 16 GB, with a common 256-bit memory interface, but we have already mentioned the Infinity Cache serves the purpose of providing improved bandwidth on the RX 6000s.
The new RX 6000s support Ray Tracing technology, thanks to the presence of Ray Accelerators, the games supported are those that use the DXR API and in the future games that will use the Vulkan Ray Tracing API.
The RX 6000 graphics cards also offer HDMI 2.1 outputs.
AMD Infinity Cache: High-performance, state-of-the-art data cache perfect for 4K and 1440p gaming with the highest level of detail. 128 MB on-die cache to drastically reduce latency and power consumption and deliver the best in-game performance against traditional architectures.
AMD Smart Access Memory: this is a feature exclusive to systems with an AMD Ryzen 5000 processor, an AMD B550 and X570 motherboard and a Radeon RX 6000 graphics card. CPUs. The result is a 13% performance boost on an AMD Radeon RX 6800 XT graphics card in Forza Horizon 4 at 4K with the new Rage Mode one-click overclocking settings.
Design for standard enclosures: With a length of 267mm and standard 8-pin 2×8 connectors, the boards are designed to work with today’s 650/750W power supplies so gamers can easily upgrade their setup whether it’s a small or large PC without additional cost.
DirectX 12 Ultimate support: offers a powerful mix of raytracing, computational and rasterization effects like DirectX Raytracing (DXR) and Variable Rate Shading, to take gaming to a new level of realism.
DirectX Raytracing (DXR): By adding a high-performance ray acceleration engine (fixed function) to each compute unit, AMD RDNA graphics cards are optimized to deliver real-time realism for lighting, shadows and reflections with DXR. In combination with AMD FidelityFX, which enables hybrid rendering, developers can combine rasterized and raytracing effects for the perfect balance of image quality and performance.
AMD FidelityFX: this open-source toolkit is aimed at game developers and is available on AMD GPUOpen. It features an arsenal of lighting, shading and reflection effects that help make games even more beautiful while offering the right balance between visual fidelity and performance.
Variable Rate Shading (VRS): Dynamically reduces the shading rate on different portions of an image when they don’t require a high level of detail, for higher performance with no perceptible change in final image quality.
Microsoft DirectStorage: with future support for the DirectStorage API, it will be about delivering ultra-fast loading times and high-quality textures by eliminating API bottlenecks while reducing the role of the CPU.
Radeon Software Performance Tuning Presets: Simple one-click presets in Radeon drivers help gamers get the most out of their graphics card. The presets incorporate the new Rage Mode for stable overclocking that takes advantage of available headroom to deliver superior gaming performance.
Radeon Anti-Lag: Significantly reduces response time between input and display to give your gameplay a competitive edge.
After offering the RX 6700 XT, based on Navi 22, with a 336 mm die, 17.2 billion transistors, 40 Compute Units, 2560 shaders and 96 MB of Infinity Cache. AMD offers us the refresh RX 6750 XT, still low on a Navi 22 GPU, with a 336 mm die, 17.2 billion transistors, 40 Compute Units, 2560 shaders and 96 MB of Infinity Cache. The difference is in the faster GDDR6 memory and the more prone GPU Boost.
.