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Geforce GTX 780 vs Radeon RX 6650 XT

Intro

The Geforce GTX 780 has a clock speed of 863 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 384-bit memory bus, and makes use of a 28 nm design. It features 2304 SPUs, 192 TAUs, and 48 ROPs.

Compare those specifications to the Radeon RX 6650 XT, which has clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 64 ROPs.

Display Graphs

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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

The Geforce GTX 780 should in theory be a bit faster than the Radeon RX 6650 XT in general. (explain)

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

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 59%) better at anisotropic 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 using 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 data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory 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 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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