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Radeon HD 7950 3GB vs Radeon RX 6600 XT

Intro

The Radeon HD 7950 3GB features a GPU clock speed of 800 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1250 MHz through a 384-bit bus. It also features 1792 SPUs, 112 TAUs, and 32 ROPs.

Compare all that to the Radeon RX 6600 XT, which has core clock speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs as well as 128 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 40 Watts (25%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6600 XT should perform just a bit faster than the Radeon HD 7950 3GB overall. (explain)

Radeon RX 6600 XT 262144 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 22144 (9%)

Texel Rate

The Radeon RX 6600 XT is much (more or less 181%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 162304 (181%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 6600 XT is the winner, by a large margin. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 100352 (392%)

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 3GB

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 7950 3GB Radeon RX 6600 XT
Manufacturer AMD AMD
Year January 2012 August 2021
Code Name Tahiti Pro Navi 23 XT
Memory 3072 MB 8192 MB
Core Speed 800 MHz 1968 MHz
Memory Speed 5000 MHz 4000 GB/s
Power (Max TDP) 200 watts 160 watts
Bandwidth 240000 MB/sec 262144 MB/sec
Texel Rate 89600 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 125952 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 largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 are processed per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 7950 3GB

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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