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Geforce GTX 780 vs Radeon RX 6600 XT

Intro

The Geforce GTX 780 comes with core speeds of 863 MHz on the GPU, and 1502 MHz on the 3072 MB of GDDR5 memory. It features 2304 SPUs along with 192 Texture Address Units and 48 ROPs.

Compare all of that to the Radeon RX 6600 XT, which makes use of a 7 nm design. AMD has set the core speed at 1968 MHz. The GDDR6 memory is set to run at a frequency of 2000 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Geforce GTX 780 250 Watts
Difference: 90 Watts (56%)

Memory Bandwidth

Theoretically, the Geforce GTX 780 should perform a small bit faster than the Radeon RX 6600 XT overall. (explain)

Geforce GTX 780 288384 MB/sec
Radeon RX 6600 XT 262144 MB/sec
Difference: 26240 (10%)

Texel Rate

The Radeon RX 6600 XT should be a lot (about 52%) more effective at texture filtering than the Geforce GTX 780. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Geforce GTX 780 165696 Mtexels/sec
Difference: 86208 (52%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 6600 XT is a better choice, and very much so. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Geforce GTX 780 41424 Mpixels/sec
Difference: 84528 (204%)

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 GTX 780

Amazon.com

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Radeon RX 6600 XT

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 GTX 780 Radeon RX 6600 XT
Manufacturer nVidia AMD
Year May 2013 August 2021
Code Name GK110 Navi 23 XT
Memory 3072 MB 8192 MB
Core Speed 863 MHz 1968 MHz
Memory Speed 6008 MHz 4000 GB/s
Power (Max TDP) 250 watts 160 watts
Bandwidth 288384 MB/sec 262144 MB/sec
Texel Rate 165696 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 125952 Mpixels/sec
Unified Shaders 2304 2048
Texture Mapping Units 192 128
Render Output Units 48 64
Bus Type GDDR5 GDDR6
Bus Width 384-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 7080 million 11060 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 11.0 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR 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 worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could 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 sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many 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

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Geforce GTX 780

Amazon.com

Check prices at:

Radeon RX 6600 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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