PowerColor Red Devil Ultimate Radeon RX 6900 XT Review: Speed Demon

How We Configured Our Test Systems: We tested the graphics cards represented in this article on a MSI X570 Godlike motherboard, equipped with a Ryzen 9 5950X and 16GB of G.SKILL DDR4 RAM clocked at 3,200MHz. The first thing we did when configuring the test system was enter the UEFI and set all values to their "high performance" defaults, then we disabled any integrated peripherals that wouldn't be put to use. The memory's clock was dialed in to its optimal performance settings using its XMP profile and the solid state drive was then formatted and Windows 10 Professional x64 was installed and fully updated. When the Windows installation was complete, we installed all of the drivers, games, applications and benchmark tools necessary to complete our tests.

For all of the standard tests, the Radeon RX 6000 series cards were tested using their "Balanced" performance profile enabled in the driver, but the PowerColor card was tested in its default OC mode (versus the optional Silent mode). "Rage" mode was enabled on the PowerColor Red Devil Ultimate Radeon RX 6900 XT for a sampling of tests present in the overclocking section of this article, however. The Radeons were also tested with Smart Access Memory enabled throughout.

HotHardware's Test System Ryzen Powered

Hardware Used: AMD Ryzen 9 5950X (3.4GHz - 4.9GHz, 16-Core) MSI X570 Godlike (AMD X570 Chipset) 16GB G.SKILL DDR4-3200 Samsung SSD 970 EVO Integrated Audio Integrated Network NVIDIA GeForce RTX 3090 FE NVIDIA GeForce RTX 3080 FE NVIDIA GeForce RTX 2080 Ti FE AMD Radeon RX 6800 AMD Radeon RX 6800 XT AMD Radeon RX 6900 XT PowerColor Red Devil Ultimate Radeon RX 6900 XT

Relevant Software: Windows 10 Pro x64 (v2004) AMD Radeon Software v21.3.2 NVIDIA GeForce Drivers v457.30 Benchmarks Used: VRMark 3DMark (Time Spy, Fire Strike, Port Royal, DXR) Unigine Superposition Crytek Neon Noir Metro Exodus Red Dead Redemption 2 Gears Tactics F1 2020 FarCry: New Dawn

Unigine Superposition Pseudo-DirectX / OpenGL Gaming

Superposition is the latest benchmark from Unigine, powered by the UNIGINE 2 Engine. It offers an array of benchmark modes, targeting gaming workloads as well as VR, with both DirectX and OpenGL code paths. There is an extreme hardware stability test built-in as well. Unigine Superposition uses the developer’s unique SSRTGI (Screen-Space Ray-Traced Global Illumination) dynamic lighting technology, along with high quality textures and models, to produce some stunning visuals. We ran Superposition in two modes using the DirectX code path – 1080p Extreme and VR Future -- to compare the performance of all of the graphics cards featured here.

Unigine Superposition

Unigine Superposition's 1080P Extreme test had the PowerColor Red Devil Ultimate Radeon RX 6900 XT finishing a few percentage points ahead of AMD's reference design, but it couldn't quite catch the GeForce RTX 3090.


Superposition's VR Future benchmark tells essentially the same story, with the PowerColor Red Devil Ultimate Radeon RX 6900 XT easily outrunning the AMD's reference design, but trailing the GeForce RTX 3090 slightly.

UL VRMark Testing Rift And Vive Readiness

UL's VRMark is designed to test a PC’s readiness for the HTC Vive and Oculus Rift virtual reality headsets. The benchmark does not, however, require that one of the headsets is attached to the PC to run and it uses an in-house graphics engine and content to ensure comparable results between different platforms. We ran the "Blue Room" VRMark test at defaults settings here, which is currently the most taxing test offered by the tool.


Our results with VRMark show the PowerColor Red Devil Ultimate Radeon RX 6900 XT nearly catching the GeForce RTX 3090 and finishing about 400 points head of the reference Radeon RX 6900 XT.

UL 3DMark Time Spy Direct X 12 Performance

In the DX12-based 3DMark Time Spy benchmark, the PowerColor Red Devil Ultimate Radeon RX 6900 XT and GeForce RTX 3090 run neck and neck. Technically the 3090 lands in the top spot, but they actually trade victories in the individual game tests and the PowerColor card ends up with a higher graphics score.

UL 3DMark Fire Strike Synthetic DirectX Gaming

3DMark Fire Strike has multiple benchmark modes: Normal mode runs at 1920x1080, Extreme mode targets 2560x1440, and Ultra mode runs at a 4K resolution. GPU target frame buffer utilization for normal mode is 1GB and the benchmark uses tessellation, ambient occlusion, volume illumination, and a medium-quality depth of field filter. The more taxing Extreme mode targets 1.5GB of frame buffer memory and increases detail levels across the board. Ultra mode is explicitly designed for high-end and CrossFire / SLI systems and cranks up the quality even further. GT 1 focuses on geometry and illumination, with over 100 shadow casting spot lights, 140 non-shadow casting point lights, and 3.9 million vertices calculated for tessellation per frame. GT2 emphasizes particles and GPU simulations.

3DMark Fire Strike


PowerColor Red Devil Ultimate Radeon RX 6900 XT Fire Strike Details

The PowerColor Red Devil Ultimate Radeon RX 6900 XT lands in the pole position in Fire Strike and puts up the best score we have seen from a single GPU in this test to date.

UL 3DMark Port Royal DXR Ray Tracing Benchmark

Port Royal was released earlier this year as an update to UL’s popular 3DMark suite. It is designed to test real-time ray tracing performance of graphics cards that support Microsoft DirectX Raytracing, or DXR. Although DXR is technically compatible with all DX12-class GPUs, the graphics card must have drivers that enable DXR. 3DMark's Port Royal benchmark shows NVIDIA's strength with Ray Tracing. Here, the PowerColor Red Devil Ultimate Radeon RX 6900 XT falls in well behind the GeForce RTX 3080, let alone the RTX 3090 which is well out in front.

We also experimented with the more focused DirectX Ray Tracing Feature test, which was recently released as an update to 3DMark...

The DXR Feature test highlights Navi 21's Achille's Heal. Even the GeForce RTX 3070 ends up being faster than the PowerColor Red Devil Ultimate Radeon RX 6900 XT here. Quizzically, the PowerColor card also ended up trailing the reference design sever so lightly, though we're talking about a fraction of a frame per second difference.