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Radeon R9 390X 8G vs Radeon RX 6700 XT

Intro

The Radeon R9 390X 8G uses a 28 nm design. AMD has set the core speed at 1050 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular card. It features 2816 SPUs along with 176 Texture Address Units and 64 ROPs.

Compare those specs to the Radeon RX 6700 XT, which uses a 7 nm design. AMD has clocked the core frequency at 2321 MHz. The GDDR6 memory is set to run at a frequency of 2000 MHz on this model. It features 2560 SPUs along with 160 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6700 XT 230 Watts
Radeon R9 390X 8G 275 Watts
Difference: 45 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6700 XT should theoretically be just a bit superior to the Radeon R9 390X 8G overall. (explain)

Radeon RX 6700 XT 393216 MB/sec
Radeon R9 390X 8G 384000 MB/sec
Difference: 9216 (2%)

Texel Rate

The Radeon RX 6700 XT is a lot (about 101%) better at AF than the Radeon R9 390X 8G. (explain)

Radeon RX 6700 XT 371360 Mtexels/sec
Radeon R9 390X 8G 184800 Mtexels/sec
Difference: 186560 (101%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 6700 XT is a better choice, by a large margin. (explain)

Radeon RX 6700 XT 148544 Mpixels/sec
Radeon R9 390X 8G 67200 Mpixels/sec
Difference: 81344 (121%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon R9 390X 8G

Amazon.com

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Radeon RX 6700 XT

Amazon.com

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon R9 390X 8G Radeon RX 6700 XT
Manufacturer AMD AMD
Year June 2015 March 2021
Code Name Grenada XT Navi 22
Memory 8192 MB (Unknown) MB
Core Speed 1050 MHz 2321 MHz
Memory Speed 6000 MHz 4000 GB/s
Power (Max TDP) 275 watts 230 watts
Bandwidth 384000 MB/sec 393216 MB/sec
Texel Rate 184800 Mtexels/sec 371360 Mtexels/sec
Pixel Rate 67200 Mpixels/sec 148544 Mpixels/sec
Unified Shaders 2816 2560
Texture Mapping Units 176 160
Render Output Units 64 64
Bus Type GDDR5 GDDR6
Bus Width 512-bit 192-bit
Fab Process 28 nm 7 nm
Transistors 6200 million 17200 million
Bus PCIe 3.0 ×16 PCIe 4.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

Radeon R9 390X 8G

Amazon.com

Check prices at:

Radeon RX 6700 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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