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Radeon R9 390 8G vs Radeon RX 6700 XT

Intro

The Radeon R9 390 8G comes with a GPU clock speed of 1000 MHz, and the 8192 MB of GDDR5 memory is set to run at 1500 MHz through a 512-bit bus. It also features 2560 Stream Processors, 160 Texture Address Units, and 64 ROPs.

Compare those specifications to the Radeon RX 6700 XT, which makes use of a 7 nm design. AMD has clocked the core frequency at 2321 MHz. The GDDR6 RAM runs at a speed of 2000 MHz on this card. It features 2560 SPUs along with 160 TAUs and 64 Rasterization Operator 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

Performance-wise, the Radeon RX 6700 XT should in theory be a bit superior to the Radeon R9 390 8G overall. (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 is quite a bit (about 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 is much (about 132%) better at anti-aliasing than the Radeon R9 390 8G, and also will be able to handle higher screen 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 largest amount of information (counted in megabytes per second) that can be transported over 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 type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability 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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