AMD Radeon R9 390X vs AMD Radeon RX 6600 XT

Compare AMD Radeon R9 390X 8 GB vs AMD Radeon RX 6600 XT 8 GB, specs and GPU benchmark score. Which is the better graphics card for the money?

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Benchmark Score

Overall Score

General gaming and workstation score

65 points

5600 points

8515% significantly better overall score

Flux Core frame rate

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

25 FPS

116 FPS

91 FPS significantly higher Flux Core frame rate

Electron frame rate

Randomly generated noise sphere test

23 FPS

85 FPS

63 FPS significantly higher Electron frame rate

City frame rate

Procedurally generated city scene with voxel rendering

30 FPS

102 FPS

72 FPS significantly higher City frame rate

Clouds frame rate

Real-time noise calculation and ray marching test

14 FPS

49 FPS

35 FPS significantly higher Clouds frame rate

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Other Benchmarks

3DMark Graphics score

High-end graphics benchmark

4254 points

9727 points

128% significantly higher 3DMark Graphics score

Specifications

Core Clock Speed

Nominal chip frequency

1050 MHz

1968 MHz

87% significantly higher core clock speed

Boost Clock Speed

Higher turbo frequency when power conditions are met

1050 MHz

2589 MHz

146% significantly higher boost clock speed

Memory

Onboard memory size for textures and vertices

8 GiB

Identical

8 GiB

Memory Bus Width

Number of parallel lines to the memory chips

512 Bit

300% significantly larger memory bus width

128 Bit

Memory Bandwidth

Data transfer speed between GPU core and memory

384 GB/s

49% significantly higher memory bandwidth

256 GB/s

TDP

Thermal Design Power: Measure of heat generated by the GPU

275 W

160 W

71% significantly lower TDP

Pixel Rate

Number of pixels that can be rendered per second

67.2 Gigapixels/s

165.7 Gigapixels/s

146% significantly higher pixel rate

Texture Rate

Number of textured pixels that can be rendered per second

184.8 Gigatexels/s

331.4 Gigatexels/s

79% significantly higher texture rate

Floating Point Performance

Raw number of floating point operations per second

5.91 TFLOPS

10.6 TFLOPS

79% significantly better floating point performance

Shading Units

Number of processors dedicated to shader processing

2816

37% slightly more shading units

2048

Texture Mapping Units

Number of processors dedicated to applying textures

176

37% slightly more texture mapping units

128

Render Output Processors

Number of processors dedicated to final pixel rendering

Identical

Other details

Rank

Ranking in the hardwareDB database

534th of 586

90th 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

2021 November

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 6600 XT benchmarks

According to the hardwareDB Benchmark, the Radeon RX 6600 XT GPU is faster than the Radeon R9 390X in gaming.

The Radeon RX 6600 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 6600 XT also has a significantly higher boost clock speed. The boost clock speed is the frequency that the GPU core can reach if the temperature is low enough. The allows for higher performance in certain scenarios.

Next up, in terms of GPU memory, they both have the same amount of memory at 8 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.

In addition, the Radeon RX 6600 XT has a significantly lower TDP at 160 W when compared to the Radeon R9 390X at 275 W. This is not a measure of performance, but rather the amount of heat generated by the chip when running at its highest speed.

In terms of raw gaming performance in our GPU benchmark, the Radeon RX 6600 XT is better than the Radeon R9 390X.