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Radeon HD 4870 2GB vs Radeon R9 380 4G

Intro

The Radeon HD 4870 2GB uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 900 MHz on this specific card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon R9 380 4G, which features a core clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
Radeon R9 380 4G 190 Watts
Difference: 40 Watts (27%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G should perform much faster than the Radeon HD 4870 2GB overall. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 67200 (58%)

Texel Rate

The Radeon R9 380 4G will be a lot (approximately 262%) more effective at anisotropic filtering than the Radeon HD 4870 2GB. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 78640 (262%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 380 4G is a better choice, by far. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon HD 4870 2GB 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 2GB

Amazon.com

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Radeon R9 380 4G

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 4870 2GB Radeon R9 380 4G
Manufacturer AMD AMD
Year Jun 25, 2008 June 2015
Code Name RV770 XT Antigua PRO
Memory 2048 MB 4096 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 largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the 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 write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of 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 4870 2GB

Amazon.com

Check prices at:

Radeon R9 380 4G

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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