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Radeon HD 4870 512MB vs Radeon R9 380 2G

Intro

The Radeon HD 4870 512MB uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this particular card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all of that to the Radeon R9 380 2G, which has a core clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 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

As far as performance goes, the Radeon R9 380 2G should in theory be much superior to the Radeon HD 4870 512MB overall. (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 will be a lot (about 262%) more effective at AF 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 should be quite a bit (approximately 159%) better at anti-aliasing than the Radeon HD 4870 512MB, and also should be able to handle higher screen resolutions while still performing well. (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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability 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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