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GeForce RTX 3080 12 GB vs Radeon HD 7950 3GB

Intro

The GeForce RTX 3080 12 GB features a clock frequency of 1260 MHz and a GDDR6X memory speed of 1188 MHz. It also makes use of a 384-bit memory bus, and makes use of a 8 nm design. It is comprised of 8960 SPUs, 280 Texture Address Units, and 112 ROPs.

Compare those specs to the Radeon HD 7950 3GB, which comes with core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB 200 Watts
GeForce RTX 3080 12 GB 350 Watts
Difference: 150 Watts (75%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should be much faster than the Radeon HD 7950 3GB overall. (explain)

GeForce RTX 3080 12 GB 934298 MB/sec
Radeon HD 7950 3GB 240000 MB/sec
Difference: 694298 (289%)

Texel Rate

The GeForce RTX 3080 12 GB will be quite a bit (more or less 294%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

GeForce RTX 3080 12 GB 352800 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 263200 (294%)

Pixel Rate

The GeForce RTX 3080 12 GB is a lot (more or less 451%) better at AA than the Radeon HD 7950 3GB, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce RTX 3080 12 GB 141120 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 115520 (451%)

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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GeForce RTX 3080 12 GB

Amazon.com

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Radeon HD 7950 3GB

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 GeForce RTX 3080 12 GB Radeon HD 7950 3GB
Manufacturer nVidia AMD
Year January 2022 January 2012
Code Name GA102-220-A1 Tahiti Pro
Memory 12288 MB 3072 MB
Core Speed 1260 MHz 800 MHz
Memory Speed 1188 GB/s 5000 MHz
Power (Max TDP) 350 watts 200 watts
Bandwidth 934298 MB/sec 240000 MB/sec
Texel Rate 352800 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 141120 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 8960 1792
Texture Mapping Units 280 112
Render Output Units 112 32
Bus Type GDDR6X GDDR5
Bus Width 384-bit 384-bit
Fab Process 8 nm 28 nm
Transistors 28300 million 4313 million
Bus PCIe 4.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.1
OpenGL Version OpenGL 4.6 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce RTX 3080 12 GB

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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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