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GeForce RTX 4080 vs GeForce RTX 4090

Intro

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

Compare those specifications to the GeForce RTX 4090, which has core clock speeds of 2235 MHz on the GPU, and 1325 MHz on the 24576 MB of GDDR6X RAM. It features 16384 SPUs along with 512 TAUs and 176 Rasterization Operator Units.

Display Graphs

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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 will be 42% faster than the GeForce RTX 4080 overall, due to 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 will be a lot (more or less 71%) better at 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

The GeForce RTX 4090 should be a lot (more or less 59%) more effective at FSAA than the GeForce RTX 4080, and also will be capable of handling higher screen resolutions without slowing down too much. (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

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 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: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce RTX 4080

Amazon.com

Check prices at:

GeForce RTX 4090

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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