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Radeon R9 390X 8G vs Radeon RX 6700 XT

Intro

The Radeon R9 390X 8G comes with clock speeds of 1050 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2816 SPUs as well as 176 Texture Address Units and 64 Rasterization Operator Units.

Compare all that to the Radeon RX 6700 XT, which has clock speeds of 2321 MHz on the GPU, and 2000 MHz on the (Unknown) MB of GDDR6 memory. It features 2560 SPUs as well as 160 Texture Address Units 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 390X 8G 275 Watts
Difference: 45 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6700 XT should be a small bit faster than 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 will be a lot (about 101%) better at anisotropic filtering 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

The Radeon RX 6700 XT should be quite a bit (about 121%) faster with regards to AA than the Radeon R9 390X 8G, and also will be capable of handling higher resolutions more effectively. (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 maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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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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