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GeForce RTX 4090 vs Radeon RX 7900 XTX

Intro

The GeForce RTX 4090 comes with a core clock frequency of 2235 MHz and a GDDR6X memory speed of 1325 MHz. It also uses a 384-bit memory bus, and makes use of a 4 nm design. It is made up of 16384 SPUs, 512 Texture Address Units, and 176 Raster Operation Units.

Compare those specs to the Radeon RX 7900 XTX, which makes use of a 5 nm design. AMD has clocked the core speed at 1855 MHz. The GDDR6 memory is set to run at a speed of 2500 MHz on this specific model. It features 6144 SPUs as well as 384 Texture Address Units and 192 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 7900 XTX 355 Watts
GeForce RTX 4090 450 Watts
Difference: 95 Watts (27%)

Memory Bandwidth

In theory, the GeForce RTX 4090 should be 6% quicker than the Radeon RX 7900 XTX overall, due to its greater bandwidth. (explain)

GeForce RTX 4090 1042432 MB/sec
Radeon RX 7900 XTX 983040 MB/sec
Difference: 59392 (6%)

Texel Rate

The GeForce RTX 4090 is quite a bit (about 61%) more effective at anisotropic filtering than the Radeon RX 7900 XTX. (explain)

GeForce RTX 4090 1144320 Mtexels/sec
Radeon RX 7900 XTX 712320 Mtexels/sec
Difference: 432000 (61%)

Pixel Rate

The GeForce RTX 4090 should be a small bit (about 10%) better at full screen anti-aliasing than the Radeon RX 7900 XTX, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce RTX 4090 393360 Mpixels/sec
Radeon RX 7900 XTX 356160 Mpixels/sec
Difference: 37200 (10%)

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 4090

Amazon.com

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Radeon RX 7900 XTX

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 GeForce RTX 4090 Radeon RX 7900 XTX
Manufacturer nVidia AMD
Year October 2022 December 2022
Code Name AD102 Navi 31 XTX
Memory 24576 MB 24576 MB
Core Speed 2235 MHz 1855 MHz
Memory Speed 1325 GB/s 2500 GB/s
Power (Max TDP) 450 watts 355 watts
Bandwidth 1042432 MB/sec 983040 MB/sec
Texel Rate 1144320 Mtexels/sec 712320 Mtexels/sec
Pixel Rate 393360 Mpixels/sec 356160 Mpixels/sec
Unified Shaders 16384 6144
Texture Mapping Units 512 384
Render Output Units 176 192
Bus Type GDDR6X GDDR6
Bus Width 384-bit 384-bit
Fab Process 4 nm 5 nm
Transistors 76300 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: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 reach the max fill rate.

Display Prices

Hide Prices

GeForce RTX 4090

Amazon.com

Check prices at:

Radeon RX 7900 XTX

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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