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GeForce RTX 4080 vs GeForce RTX 4090

Intro

The GeForce RTX 4080 features a core clock speed of 2205 MHz and a GDDR6X memory speed of 1400 MHz. It also features a 256-bit memory bus, and makes use of a 4 nm design. It is comprised of 9728 SPUs, 304 Texture Address Units, and 112 Raster Operation Units.

Compare those specs to the GeForce RTX 4090, which uses a 4 nm design. nVidia has set the core speed at 2235 MHz. The GDDR6X RAM works at a frequency of 1325 MHz on this model. It features 16384 SPUs as well as 512 Texture Address Units and 176 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 4080 320 Watts
GeForce RTX 4090 450 Watts
Difference: 130 Watts (41%)

Memory Bandwidth

In theory, the GeForce RTX 4090 is 42% quicker than the GeForce RTX 4080 overall, because of its greater bandwidth. (explain)

GeForce RTX 4090 1042432 MB/sec
GeForce RTX 4080 734003 MB/sec
Difference: 308429 (42%)

Texel Rate

The GeForce RTX 4090 is quite a bit (about 71%) faster with regards to texture filtering than the GeForce RTX 4080. (explain)

GeForce RTX 4090 1144320 Mtexels/sec
GeForce RTX 4080 670320 Mtexels/sec
Difference: 474000 (71%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce RTX 4090 is superior to the GeForce RTX 4080, by a large margin. (explain)

GeForce RTX 4090 393360 Mpixels/sec
GeForce RTX 4080 246960 Mpixels/sec
Difference: 146400 (59%)

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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GeForce RTX 4090

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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 4080 GeForce RTX 4090
Manufacturer nVidia nVidia
Year November 2022 October 2022
Code Name AD103-300-A1 AD102
Memory 16384 MB 24576 MB
Core Speed 2205 MHz 2235 MHz
Memory Speed 1400 GB/s 1325 GB/s
Power (Max TDP) 320 watts 450 watts
Bandwidth 734003 MB/sec 1042432 MB/sec
Texel Rate 670320 Mtexels/sec 1144320 Mtexels/sec
Pixel Rate 246960 Mpixels/sec 393360 Mpixels/sec
Unified Shaders 9728 16384
Texture Mapping Units 304 512
Render Output Units 112 176
Bus Type GDDR6X GDDR6X
Bus Width 256-bit 384-bit
Fab Process 4 nm 4 nm
Transistors 45900 million 76300 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 (in units of MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce RTX 4080

Amazon.com

Check prices at:

GeForce RTX 4090

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.

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