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Radeon HD 7950 vs Radeon RX 6650 XT

Intro

The Radeon HD 7950 features a GPU core clock speed of 800 MHz, and the 1536 MB of GDDR5 RAM runs at 1250 MHz through a 384-bit bus. It also features 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon RX 6650 XT, which has core clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Radeon HD 7950 200 Watts
Difference: 24 Watts (14%)

Memory Bandwidth

Theoretically, the Radeon RX 6650 XT should be a bit faster than the Radeon HD 7950 in general. (explain)

Radeon RX 6650 XT 287072 MB/sec
Radeon HD 7950 240000 MB/sec
Difference: 47072 (20%)

Texel Rate

The Radeon RX 6650 XT will be a lot (more or less 194%) better at anisotropic filtering than the Radeon HD 7950. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 173440 (194%)

Pixel Rate

The Radeon RX 6650 XT should be a lot (more or less 414%) more effective at anti-aliasing than the Radeon HD 7950, and also able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 105920 (414%)

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 7950

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.

Specifications

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Model Radeon HD 7950 Radeon RX 6650 XT
Manufacturer AMD AMD
Year January 2012 May 2022
Code Name Tahiti Pro Navi 23
Memory 1536 MB 8192 MB
Core Speed 800 MHz 2055 MHz
Memory Speed 5000 MHz 4380 GB/s
Power (Max TDP) 200 watts 176 watts
Bandwidth 240000 MB/sec 287072 MB/sec
Texel Rate 89600 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 131520 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
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 maximum amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7950

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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