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GeForce GTX 780 Ti vs Radeon RX 6650 XT

Intro

The GeForce GTX 780 Ti has a GPU core clock speed of 875 MHz, and the 3072 MB of GDDR5 memory runs at 1750 MHz through a 384-bit bus. It also is comprised of 2880 Stream Processors, 240 Texture Address Units, and 48 ROPs.

Compare those specs to the Radeon RX 6650 XT, which has GPU clock speed of 2055 MHz, and 8192 MB of GDDR6 RAM running at 2190 MHz through a 128-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, 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 Ti 250 Watts
Difference: 74 Watts (42%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 780 Ti should perform a bit faster than the Radeon RX 6650 XT overall. (explain)

GeForce GTX 780 Ti 336000 MB/sec
Radeon RX 6650 XT 287072 MB/sec
Difference: 48928 (17%)

Texel Rate

The Radeon RX 6650 XT should be quite a bit (approximately 25%) better at AF than the GeForce GTX 780 Ti. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
GeForce GTX 780 Ti 210000 Mtexels/sec
Difference: 53040 (25%)

Pixel Rate

The Radeon RX 6650 XT is quite a bit (more or less 213%) better at FSAA than the GeForce GTX 780 Ti, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
GeForce GTX 780 Ti 42000 Mpixels/sec
Difference: 89520 (213%)

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 Ti

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.

Specifications

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Model GeForce GTX 780 Ti Radeon RX 6650 XT
Manufacturer nVidia AMD
Year November 2013 May 2022
Code Name GK110 Navi 23
Memory 3072 MB 8192 MB
Core Speed 875 MHz 2055 MHz
Memory Speed 7000 MHz 4380 GB/s
Power (Max TDP) 250 watts 176 watts
Bandwidth 336000 MB/sec 287072 MB/sec
Texel Rate 210000 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 42000 Mpixels/sec 131520 Mpixels/sec
Unified Shaders 2880 2048
Texture Mapping Units 240 128
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 4.4 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 780 Ti

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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