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Radeon HD 7950 vs Radeon RX 6600

Intro

The Radeon HD 7950 has 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 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

Compare all of that to the Radeon RX 6600, which features a core clock speed of 1626 MHz and a GDDR6 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and uses a 7 nm design. It features 1792 SPUs, 112 Texture Address Units, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 132 Watts
Radeon HD 7950 200 Watts
Difference: 68 Watts (52%)

Memory Bandwidth

The Radeon HD 7950, in theory, should be a bit faster than the Radeon RX 6600 overall. (explain)

Radeon HD 7950 240000 MB/sec
Radeon RX 6600 229376 MB/sec
Difference: 10624 (5%)

Texel Rate

The Radeon RX 6600 should be much (approximately 103%) better at AF than the Radeon HD 7950. (explain)

Radeon RX 6600 182112 Mtexels/sec
Radeon HD 7950 89600 Mtexels/sec
Difference: 92512 (103%)

Pixel Rate

The Radeon RX 6600 will be much (about 307%) faster with regards to full screen anti-aliasing than the Radeon HD 7950, and able to handle higher screen resolutions better. (explain)

Radeon RX 6600 104064 Mpixels/sec
Radeon HD 7950 25600 Mpixels/sec
Difference: 78464 (307%)

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 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.

Specifications

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Model Radeon HD 7950 Radeon RX 6600
Manufacturer AMD AMD
Year January 2012 October 2021
Code Name Tahiti Pro Navi 23
Memory 1536 MB 8192 MB
Core Speed 800 MHz 1626 MHz
Memory Speed 5000 MHz 3500 GB/s
Power (Max TDP) 200 watts 132 watts
Bandwidth 240000 MB/sec 229376 MB/sec
Texel Rate 89600 Mtexels/sec 182112 Mtexels/sec
Pixel Rate 25600 Mpixels/sec 104064 Mpixels/sec
Unified Shaders 1792 1792
Texture Mapping Units 112 112
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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 7950

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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