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GeForce GTX 660 vs Radeon RX 6500 XT

Intro

The GeForce GTX 660 has clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs along with 80 TAUs and 24 Rasterization Operator Units.

Compare those specs to the Radeon RX 6500 XT, which comes with clock speeds of 2200 MHz on the GPU, and 2250 MHz on the 4096 MB of GDDR6 memory. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

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

Theoretically speaking, the Radeon RX 6500 XT should be just a bit faster than the GeForce GTX 660 overall. (explain)

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

Texel Rate

The Radeon RX 6500 XT will be a lot (more or less 80%) faster with regards to 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%) better at AA than the GeForce GTX 660, and should be able to handle higher resolutions without losing too much performance. (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: Bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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