AMD Radeon R9 390X vs AMD Radeon RX 6900 XT

Compare AMD Radeon R9 390X 8 GB vs AMD Radeon RX 6900 XT 16 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Specifications
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Benchmark Score

Overall Score

General gaming and workstation score

65 points

14121 points

21624% significantly better overall score

Flux Core frame rate

Volumetric ray casting test, a computationally expensive method of rendering high-quality scenes

25 FPS

286 FPS

261 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

23 FPS

208 FPS

185 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

30 FPS

257 FPS

227 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

14 FPS

122 FPS

109 FPS significantly higher Clouds frame rate

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

4254 points

4% slightly higher 3DMark Graphics score

4065 points

Specifications

Core Clock Speed

Nominal chip frequency

1050 MHz

1825 MHz

73% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1050 MHz

2250 MHz

114% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

8 GiB

16 GiB

100% significantly more memory

Memory Bus Width

Number of parallel lines to the memory chips

512 Bit

100% significantly larger memory bus width

256 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

384 GB/s

512 GB/s

33% slightly higher memory bandwidth

TDP

Thermal Design Power: Measure of heat generated by the GPU

275 W

9% slightly lower TDP

300 W

Pixel Rate

Number of pixels that can be rendered per second

67.2 Gigapixels/s

288 Gigapixels/s

328% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

184.8 Gigatexels/s

720 Gigatexels/s

289% significantly higher texture rate

Floating Point Performance

Raw number of floating point operations per second

5.91 TFLOPS

23.04 TFLOPS

289% significantly better floating point performance

Shading Units

Number of processors dedicated to shader processing

2816

5120

81% significantly more shading units

Texture Mapping Units

Number of processors dedicated to applying textures

176

320

81% significantly more texture mapping units

Render Output Processors

Number of processors dedicated to final pixel rendering

128

100% significantly more render output processors

Other details

Rank

Ranking in the hardwareDB database

534th of 586

24th of 586

Family

The product line

Radeon R9 300 Series

Radeon RX 6000 Series

Release date

The official date of release of this chip

2015 June

2020 August

Memory Type

The type of memory used by this chip

GDDR5

GDDR6

DirectX Support

Maximum version of DirectX supported

12.0

OpenGL Support

Maximum version of OpenGL supported

4.5

4.6

Radeon R9 390X vs Radeon RX 6900 XT comparison

For gaming, the Radeon RX 6900 XT graphics card is better than the Radeon R9 390X in our tests.

Our database shows that the Radeon RX 6900 XT has a significantly higher core clock speed. This is the frequency at which the graphics core is running at. While not necessarily an indicator of overall performance, this metric can be useful when comparing two GPUs based on the same architecture. In addition, the Radeon RX 6900 XT also has a significantly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.

Furthermore, the spec sheet for both these GPUs show that the Radeon RX 6900 XT has significantly more memory with 16 GiB of memory compared to 8 GiB. Lots of memory is good when playing at high resolutions or with many monitors.

In addition, the Radeon R9 390X has a slightly lower TDP at 275 W when compared to the Radeon RX 6900 XT at 300 W. TDP (Thermal Design Power) measures total heat output from the chip.

In conclusion, all specs and GPU benchmarks considered, will recommend the Radeon RX 6900 XT over the Radeon R9 390X.