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Geforce GTX 780 vs Radeon RX 6650 XT

Intro

The Geforce GTX 780 comes with a GPU clock speed of 863 MHz, and the 3072 MB of GDDR5 RAM runs at 1502 MHz through a 384-bit bus. It also is made up of 2304 Stream Processors, 192 TAUs, and 48 ROPs.

Compare those specifications to the Radeon RX 6650 XT, which features GPU clock speed of 2055 MHz, and 8192 MB of GDDR6 memory set to run at 2190 MHz through a 128-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

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

Theoretically speaking, the Geforce GTX 780 should be a bit faster than the Radeon RX 6650 XT overall. (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 much (approximately 59%) better at AF than the Geforce GTX 780. (explain)

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

Pixel Rate

The Radeon RX 6650 XT will be a lot (more or less 217%) better at full screen anti-aliasing than the Geforce GTX 780, and able to handle higher resolutions while still performing well. (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 largest amount of information (counted in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant 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

Hide Prices

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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