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GeForce RTX 3080 12 GB vs Radeon HD 4870 2GB

Intro

The GeForce RTX 3080 12 GB has a GPU core clock speed of 1260 MHz, and the 12288 MB of GDDR6X memory is set to run at 1188 MHz through a 384-bit bus. It also is made up of 8960 Stream Processors, 280 TAUs, and 112 ROPs.

Compare that to the Radeon HD 4870 2GB, which has a clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
GeForce RTX 3080 12 GB 350 Watts
Difference: 200 Watts (133%)

Memory Bandwidth

The GeForce RTX 3080 12 GB should theoretically be much faster than the Radeon HD 4870 2GB in general. (explain)

GeForce RTX 3080 12 GB 934298 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 819098 (711%)

Texel Rate

The GeForce RTX 3080 12 GB is quite a bit (approximately 1076%) more effective at texture filtering than the Radeon HD 4870 2GB. (explain)

GeForce RTX 3080 12 GB 352800 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 322800 (1076%)

Pixel Rate

The GeForce RTX 3080 12 GB should be much (approximately 1076%) more effective at anti-aliasing than the Radeon HD 4870 2GB, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce RTX 3080 12 GB 141120 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 129120 (1076%)

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 4870 2GB

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 4870 2GB
Manufacturer nVidia AMD
Year January 2022 Jun 25, 2008
Code Name GA102-220-A1 RV770 XT
Memory 12288 MB 2048 MB
Core Speed 1260 MHz 750 MHz
Memory Speed 1188 GB/s 3600 MHz
Power (Max TDP) 350 watts 150 watts
Bandwidth 934298 MB/sec 115200 MB/sec
Texel Rate 352800 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 141120 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 8960 800(160x5)
Texture Mapping Units 280 40
Render Output Units 112 16
Bus Type GDDR6X GDDR5
Bus Width 384-bit 256-bit
Fab Process 8 nm 55 nm
Transistors 28300 million 956 million
Bus PCIe 4.0 x16 PCIe 2.0 x16
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.6 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce RTX 3080 12 GB

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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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