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GeForce RTX 4080 vs Radeon RX 6950 XT

Intro

The GeForce RTX 4080 uses a 4 nm design. nVidia has clocked the core speed at 2205 MHz. The GDDR6X memory works at a speed of 1400 MHz on this specific model. It features 9728 SPUs along with 304 TAUs and 112 ROPs.

Compare those specs to the Radeon RX 6950 XT, which uses a 7 nm design. AMD has set the core speed at 1925 MHz. The GDDR6 memory works at a speed of 2250 MHz on this particular model. It features 5120 SPUs along with 320 TAUs and 128 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080 320 Watts
Radeon RX 6950 XT 335 Watts
Difference: 15 Watts (5%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 4080 should be 24% faster than the Radeon RX 6950 XT in general, because of its higher data rate. (explain)

GeForce RTX 4080 734003 MB/sec
Radeon RX 6950 XT 589824 MB/sec
Difference: 144179 (24%)

Texel Rate

The GeForce RTX 4080 is just a bit (approximately 9%) faster with regards to anisotropic filtering than the Radeon RX 6950 XT. (explain)

GeForce RTX 4080 670320 Mtexels/sec
Radeon RX 6950 XT 616000 Mtexels/sec
Difference: 54320 (9%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce RTX 4080 is a better choice, but only just. (explain)

GeForce RTX 4080 246960 Mpixels/sec
Radeon RX 6950 XT 246400 Mpixels/sec
Difference: 560 (0%)

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

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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 4080 Radeon RX 6950 XT
Manufacturer nVidia AMD
Year November 2022 May 2022
Code Name AD103-300-A1 Navi 21
Memory 16384 MB 16384 MB
Core Speed 2205 MHz 1925 MHz
Memory Speed 1400 GB/s 2250 GB/s
Power (Max TDP) 320 watts 335 watts
Bandwidth 734003 MB/sec 589824 MB/sec
Texel Rate 670320 Mtexels/sec 616000 Mtexels/sec
Pixel Rate 246960 Mpixels/sec 246400 Mpixels/sec
Unified Shaders 9728 5120
Texture Mapping Units 304 320
Render Output Units 112 128
Bus Type GDDR6X GDDR6
Bus Width 256-bit 256-bit
Fab Process 4 nm 7 nm
Transistors 45900 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: Memory bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 can be applied in one second. This figure 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce RTX 4080

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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