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Radeon HD 7970 vs Radeon RX 6600

Intro

The Radeon HD 7970 makes use of a 28 nm design. AMD has set the core speed at 925 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon RX 6600, which comes with core clock speeds of 1626 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 64 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 132 Watts
Radeon HD 7970 250 Watts
Difference: 118 Watts (89%)

Memory Bandwidth

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

Radeon HD 7970 264000 MB/sec
Radeon RX 6600 229376 MB/sec
Difference: 34624 (15%)

Texel Rate

The Radeon RX 6600 will be quite a bit (approximately 54%) faster with regards to AF than the Radeon HD 7970. (explain)

Radeon RX 6600 182112 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 63712 (54%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6600 is a better choice, and very much so. (explain)

Radeon RX 6600 104064 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 74464 (252%)

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

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
Manufacturer AMD AMD
Year January 2012 October 2021
Code Name Tahiti XT Navi 23
Memory 3072 MB 8192 MB
Core Speed 925 MHz 1626 MHz
Memory Speed 5500 MHz 3500 GB/s
Power (Max TDP) 250 watts 132 watts
Bandwidth 264000 MB/sec 229376 MB/sec
Texel Rate 118400 Mtexels/sec 182112 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 104064 Mpixels/sec
Unified Shaders 2048 1792
Texture Mapping Units 128 112
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 largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7970

Amazon.com

Check prices at:

Radeon RX 6600

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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