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Radeon HD 7970 vs Radeon RX 6600 XT

Intro

The Radeon HD 7970 comes with a core clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 384-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon RX 6600 XT, which uses a 7 nm design. AMD has set the core frequency at 1968 MHz. The GDDR6 RAM runs at a frequency of 2000 MHz on this particular card. It features 2048 SPUs as well as 128 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Radeon HD 7970 250 Watts
Difference: 90 Watts (56%)

Memory Bandwidth

The Radeon HD 7970 should theoretically perform a bit faster than the Radeon RX 6600 XT overall. (explain)

Radeon HD 7970 264000 MB/sec
Radeon RX 6600 XT 262144 MB/sec
Difference: 1856 (1%)

Texel Rate

The Radeon RX 6600 XT should be quite a bit (approximately 113%) faster with regards to texture filtering than the Radeon HD 7970. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 133504 (113%)

Pixel Rate

The Radeon RX 6600 XT should be quite a bit (approximately 326%) faster with regards to full screen anti-aliasing than the Radeon HD 7970, and capable of handling higher screen resolutions more effectively. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 96352 (326%)

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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Radeon HD 7970

Amazon.com

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Radeon RX 6600 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 Radeon HD 7970 Radeon RX 6600 XT
Manufacturer AMD AMD
Year January 2012 August 2021
Code Name Tahiti XT Navi 23 XT
Memory 3072 MB 8192 MB
Core Speed 925 MHz 1968 MHz
Memory Speed 5500 MHz 4000 GB/s
Power (Max TDP) 250 watts 160 watts
Bandwidth 264000 MB/sec 262144 MB/sec
Texel Rate 118400 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 125952 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
Render Output Units 32 64
Bus Type GDDR5 GDDR6
Bus Width 384-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 11060 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.2 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics 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 most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines 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 fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 7970

Amazon.com

Check prices at:

Radeon RX 6600 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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