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Radeon HD 7950 vs Radeon RX 6600 XT

Intro

The Radeon HD 7950 features a clock speed of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 384-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Compare all that to the Radeon RX 6600 XT, which makes use of a 7 nm design. AMD has clocked the core frequency at 1968 MHz. The GDDR6 memory works at a speed of 2000 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units 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 7950 200 Watts
Difference: 40 Watts (25%)

Memory Bandwidth

The Radeon RX 6600 XT should in theory be a little bit faster than the Radeon HD 7950 in general. (explain)

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

Texel Rate

The Radeon RX 6600 XT will be a lot (about 181%) faster with regards to AF than the Radeon HD 7950. (explain)

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

Pixel Rate

The Radeon RX 6600 XT will be a lot (about 392%) better at full screen anti-aliasing than the Radeon HD 7950, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon HD 7950 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

Amazon.com

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Radeon RX 6600 XT

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 7950 Radeon RX 6600 XT
Manufacturer AMD AMD
Year January 2012 August 2021
Code Name Tahiti Pro Navi 23 XT
Memory 1536 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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, 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 anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the 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 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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