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GeForce RTX 4080 vs Radeon RX 7900 XT

Intro

The GeForce RTX 4080 features a GPU core speed of 2205 MHz, and the 16384 MB of GDDR6X RAM runs at 1400 MHz through a 256-bit bus. It also features 9728 SPUs, 304 TAUs, and 112 ROPs.

Compare all of that to the Radeon RX 7900 XT, which features core clock speeds of 1500 MHz on the GPU, and 2500 MHz on the 20480 MB of GDDR6 memory. It features 5376 SPUs along with 336 Texture Address Units and 192 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XT 300 Watts
GeForce RTX 4080 320 Watts
Difference: 20 Watts (7%)

Memory Bandwidth

In theory, the Radeon RX 7900 XT is 12% quicker than the GeForce RTX 4080 in general, due to its higher bandwidth. (explain)

Radeon RX 7900 XT 819200 MB/sec
GeForce RTX 4080 734003 MB/sec
Difference: 85197 (12%)

Texel Rate

The GeForce RTX 4080 should be quite a bit (more or less 33%) more effective at anisotropic filtering than the Radeon RX 7900 XT. (explain)

GeForce RTX 4080 670320 Mtexels/sec
Radeon RX 7900 XT 504000 Mtexels/sec
Difference: 166320 (33%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 7900 XT is the winner, but only just. (explain)

Radeon RX 7900 XT 288000 Mpixels/sec
GeForce RTX 4080 246960 Mpixels/sec
Difference: 41040 (17%)

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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GeForce RTX 4080

Amazon.com

Check prices at:

Radeon RX 7900 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.

Specifications

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Model GeForce RTX 4080 Radeon RX 7900 XT
Manufacturer nVidia AMD
Year November 2022 December 2022
Code Name AD103-300-A1 Navi 31 XT
Memory 16384 MB 20480 MB
Core Speed 2205 MHz 1500 MHz
Memory Speed 1400 GB/s 2500 GB/s
Power (Max TDP) 320 watts 300 watts
Bandwidth 734003 MB/sec 819200 MB/sec
Texel Rate 670320 Mtexels/sec 504000 Mtexels/sec
Pixel Rate 246960 Mpixels/sec 288000 Mpixels/sec
Unified Shaders 9728 5376
Texture Mapping Units 304 336
Render Output Units 112 192
Bus Type GDDR6X GDDR6
Bus Width 256-bit 320-bit
Fab Process 4 nm 5 nm
Transistors 45900 million 57700 million
Bus PCIe 4.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.6 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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 ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce RTX 4080

Amazon.com

Check prices at:

Radeon RX 7900 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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