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Radeon R9 390 8G vs Radeon RX 6700 XT

Intro

The Radeon R9 390 8G uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1500 MHz on this particular model. It features 2560 SPUs as well as 160 Texture Address Units and 64 Rasterization Operator Units.

Compare those specs to the Radeon RX 6700 XT, which comes with a core clock frequency of 2321 MHz and a GDDR6 memory speed of 2000 MHz. It also uses a 192-bit memory bus, and makes use of a 7 nm design. It is made up of 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon RX 6700 XT should be a bit faster than the Radeon R9 390 8G in general. (explain)

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

Texel Rate

The Radeon RX 6700 XT will be a lot (more or less 132%) faster with regards to AF than the Radeon R9 390 8G. (explain)

Radeon RX 6700 XT 371360 Mtexels/sec
Radeon R9 390 8G 160000 Mtexels/sec
Difference: 211360 (132%)

Pixel Rate

The Radeon RX 6700 XT will be quite a bit (approximately 132%) faster with regards to AA than the Radeon R9 390 8G, and able to handle higher resolutions while still performing well. (explain)

Radeon RX 6700 XT 148544 Mpixels/sec
Radeon R9 390 8G 64000 Mpixels/sec
Difference: 84544 (132%)

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 390 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 390 8G Radeon RX 6700 XT
Manufacturer AMD AMD
Year June 2015 March 2021
Code Name Grenada PRO Navi 22
Memory 8192 MB (Unknown) MB
Core Speed 1000 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 160000 Mtexels/sec 371360 Mtexels/sec
Pixel Rate 64000 Mpixels/sec 148544 Mpixels/sec
Unified Shaders 2560 2560
Texture Mapping Units 160 160
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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon R9 390 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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