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GeForce GTX 660 vs Radeon RX 6500 XT

Intro

The GeForce GTX 660 uses a 28 nm design. nVidia has clocked the core frequency at 980 MHz. The GDDR5 memory runs at a frequency of 1502 MHz on this specific card. It features 960 SPUs along with 80 TAUs and 24 Rasterization Operator Units.

Compare those specs to the Radeon RX 6500 XT, which makes use of a 6 nm design. AMD has set the core speed at 2200 MHz. The GDDR6 RAM works at a frequency of 2250 MHz on this card. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6500 XT 107 Watts
GeForce GTX 660 140 Watts
Difference: 33 Watts (31%)

Memory Bandwidth

The Radeon RX 6500 XT should theoretically be a bit faster than the GeForce GTX 660 in general. (explain)

Radeon RX 6500 XT 147456 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 3264 (2%)

Texel Rate

The Radeon RX 6500 XT should be a lot (approximately 80%) more effective at AF than the GeForce GTX 660. (explain)

Radeon RX 6500 XT 140800 Mtexels/sec
GeForce GTX 660 78400 Mtexels/sec
Difference: 62400 (80%)

Pixel Rate

The Radeon RX 6500 XT should be quite a bit (approximately 199%) more effective at AA than the GeForce GTX 660, and also capable of handling higher screen resolutions better. (explain)

Radeon RX 6500 XT 70400 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 46880 (199%)

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 660

Amazon.com

Check prices at:

Radeon RX 6500 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 660 Radeon RX 6500 XT
Manufacturer nVidia AMD
Year September 2012 January 2022
Code Name GK106 Navi 24 XT
Memory 2048 MB 4096 MB
Core Speed 980 MHz 2200 MHz
Memory Speed 6008 MHz 4500 GB/s
Power (Max TDP) 140 watts 107 watts
Bandwidth 144192 MB/sec 147456 MB/sec
Texel Rate 78400 Mtexels/sec 140800 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 70400 Mpixels/sec
Unified Shaders 960 1024
Texture Mapping Units 80 64
Render Output Units 24 32
Bus Type GDDR5 GDDR6
Bus Width 192-bit 64-bit
Fab Process 28 nm 6 nm
Transistors 2540 million 5400 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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 660

Amazon.com

Check prices at:

Radeon RX 6500 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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