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GeForce RTX 4090 vs Radeon RX 6950 XT

Intro

The GeForce RTX 4090 has a core clock frequency of 2235 MHz and a GDDR6X memory frequency of 1325 MHz. It also uses a 384-bit memory bus, and uses a 4 nm design. It is comprised of 16384 SPUs, 512 TAUs, and 176 Raster Operation Units.

Compare all of that to the Radeon RX 6950 XT, which features a clock frequency of 1925 MHz and a GDDR6 memory speed of 2250 MHz. It also uses a 256-bit bus, and makes use of a 7 nm design. It is comprised of 5120 SPUs, 320 Texture Address Units, and 128 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6950 XT 335 Watts
GeForce RTX 4090 450 Watts
Difference: 115 Watts (34%)

Memory Bandwidth

Performance-wise, the GeForce RTX 4090 should theoretically be much better than the Radeon RX 6950 XT overall. (explain)

GeForce RTX 4090 1042432 MB/sec
Radeon RX 6950 XT 589824 MB/sec
Difference: 452608 (77%)

Texel Rate

The GeForce RTX 4090 is quite a bit (approximately 86%) faster with regards to AF than the Radeon RX 6950 XT. (explain)

GeForce RTX 4090 1144320 Mtexels/sec
Radeon RX 6950 XT 616000 Mtexels/sec
Difference: 528320 (86%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce RTX 4090 is superior to the Radeon RX 6950 XT, by a large margin. (explain)

GeForce RTX 4090 393360 Mpixels/sec
Radeon RX 6950 XT 246400 Mpixels/sec
Difference: 146960 (60%)

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

Check prices at:

Radeon RX 6950 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 4090 Radeon RX 6950 XT
Manufacturer nVidia AMD
Year October 2022 May 2022
Code Name AD102 Navi 21
Memory 24576 MB 16384 MB
Core Speed 2235 MHz 1925 MHz
Memory Speed 1325 GB/s 2250 GB/s
Power (Max TDP) 450 watts 335 watts
Bandwidth 1042432 MB/sec 589824 MB/sec
Texel Rate 1144320 Mtexels/sec 616000 Mtexels/sec
Pixel Rate 393360 Mpixels/sec 246400 Mpixels/sec
Unified Shaders 16384 5120
Texture Mapping Units 512 320
Render Output Units 176 128
Bus Type GDDR6X GDDR6
Bus Width 384-bit 256-bit
Fab Process 4 nm 7 nm
Transistors 76300 million 26800 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 max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 output rate also depends on quite a few other factors, most notably 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

GeForce RTX 4090

Amazon.com

Check prices at:

Radeon RX 6950 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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