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Geforce GTX 780 vs Radeon RX 6650 XT

Intro

The Geforce GTX 780 uses a 28 nm design. nVidia has set the core frequency at 863 MHz. The GDDR5 memory runs at a speed of 1502 MHz on this card. It features 2304 SPUs as well as 192 Texture Address Units and 48 Rasterization Operator Units.

Compare all of that to the Radeon RX 6650 XT, which makes use of a 7 nm design. AMD has set the core speed at 2055 MHz. The GDDR6 RAM runs at a frequency of 2190 MHz on this specific model. It features 2048 SPUs along with 128 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Geforce GTX 780 250 Watts
Difference: 74 Watts (42%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 is 0% quicker than the Radeon RX 6650 XT overall, because of its higher bandwidth. (explain)

Geforce GTX 780 288384 MB/sec
Radeon RX 6650 XT 287072 MB/sec
Difference: 1312 (0%)

Texel Rate

The Radeon RX 6650 XT is quite a bit (about 59%) better at texture filtering than the Geforce GTX 780. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Geforce GTX 780 165696 Mtexels/sec
Difference: 97344 (59%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6650 XT is a better choice, by a large margin. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Geforce GTX 780 41424 Mpixels/sec
Difference: 90096 (217%)

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 6650 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 6650 XT
Manufacturer nVidia AMD
Year May 2013 May 2022
Code Name GK110 Navi 23
Memory 3072 MB 8192 MB
Core Speed 863 MHz 2055 MHz
Memory Speed 6008 MHz 4380 GB/s
Power (Max TDP) 250 watts 176 watts
Bandwidth 288384 MB/sec 287072 MB/sec
Texel Rate 165696 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 131520 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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If it uses DDR memory, it must 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Geforce GTX 780

Amazon.com

Check prices at:

Radeon RX 6650 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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