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Radeon HD 7970 vs Radeon RX 6600 XT

Intro

The Radeon HD 7970 makes use of a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this card. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Compare those specs to the Radeon RX 6600 XT, which has clock speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs along with 128 TAUs and 64 Rasterization Operator Units.

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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

Performance-wise, the Radeon HD 7970 should in theory be a small bit superior to 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 much (approximately 113%) faster with regards to anisotropic 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

If using a high resolution is important to you, then the Radeon RX 6600 XT is the winner, by far. (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

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.

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 megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

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