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Radeon HD 7970 vs Radeon RX 6650 XT

Intro

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

Compare all that to the Radeon RX 6650 XT, which makes use of a 7 nm design. AMD has clocked the core speed at 2055 MHz. The GDDR6 RAM runs at a frequency of 2190 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Radeon HD 7970 250 Watts
Difference: 74 Watts (42%)

Memory Bandwidth

Theoretically, the Radeon RX 6650 XT should be a small bit faster than the Radeon HD 7970 overall. (explain)

Radeon RX 6650 XT 287072 MB/sec
Radeon HD 7970 264000 MB/sec
Difference: 23072 (9%)

Texel Rate

The Radeon RX 6650 XT will be a lot (more or less 122%) faster with regards to AF than the Radeon HD 7970. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Radeon HD 7970 118400 Mtexels/sec
Difference: 144640 (122%)

Pixel Rate

The Radeon RX 6650 XT will be much (more or less 344%) faster with regards to FSAA than the Radeon HD 7970, and also able to handle higher resolutions more effectively. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Radeon HD 7970 29600 Mpixels/sec
Difference: 101920 (344%)

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 6650 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 6650 XT
Manufacturer AMD AMD
Year January 2012 May 2022
Code Name Tahiti XT Navi 23
Memory 3072 MB 8192 MB
Core Speed 925 MHz 2055 MHz
Memory Speed 5500 MHz 4380 GB/s
Power (Max TDP) 250 watts 176 watts
Bandwidth 264000 MB/sec 287072 MB/sec
Texel Rate 118400 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 131520 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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 7970

Amazon.com

Check prices at:

Radeon RX 6650 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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