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Radeon HD 4870 512MB vs Radeon R9 380 2G

Intro

The Radeon HD 4870 512MB comes with a core clock speed of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon R9 380 2G, which uses a 28 nm design. AMD has clocked the core speed at 970 MHz. The GDDR5 RAM runs at a speed of 1425 MHz on this particular model. It features 1792 SPUs as well as 112 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 512MB 150 Watts
Radeon R9 380 2G 190 Watts
Difference: 40 Watts (27%)

Memory Bandwidth

Theoretically, the Radeon R9 380 2G should be much faster than the Radeon HD 4870 512MB in general. (explain)

Radeon R9 380 2G 182400 MB/sec
Radeon HD 4870 512MB 115200 MB/sec
Difference: 67200 (58%)

Texel Rate

The Radeon R9 380 2G should be much (about 262%) more effective at texture filtering than the Radeon HD 4870 512MB. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
Radeon HD 4870 512MB 30000 Mtexels/sec
Difference: 78640 (262%)

Pixel Rate

The Radeon R9 380 2G will be a lot (approximately 159%) better at anti-aliasing than the Radeon HD 4870 512MB, and will be able to handle higher resolutions more effectively. (explain)

Radeon R9 380 2G 31040 Mpixels/sec
Radeon HD 4870 512MB 12000 Mpixels/sec
Difference: 19040 (159%)

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 4870 512MB

Amazon.com

Check prices at:

Radeon R9 380 2G

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 4870 512MB Radeon R9 380 2G
Manufacturer AMD AMD
Year Jun 25, 2008 June 2015
Code Name RV770 XT Antigua PRO
Memory 512 MB 2048 MB
Core Speed 750 MHz 970 MHz
Memory Speed 3600 MHz 5700 MHz
Power (Max TDP) 150 watts 190 watts
Bandwidth 115200 MB/sec 182400 MB/sec
Texel Rate 30000 Mtexels/sec 108640 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 800(160x5) 1792
Texture Mapping Units 40 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 956 million 5000 million
Bus PCIe 2.0 x16 PCIe 3.0 ×16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 figure 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 512MB

Amazon.com

Check prices at:

Radeon R9 380 2G

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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