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Radeon HD 4870 2GB vs Radeon RX 460

Intro

The Radeon HD 4870 2GB has a core clock frequency of 750 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It features 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Compare that to the Radeon RX 460, which features clock speeds of 1090 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 75 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 75 Watts (100%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 2GB should be just a bit faster than the Radeon RX 460 overall. (explain)

Radeon HD 4870 2GB 115200 MB/sec
Radeon RX 460 112000 MB/sec
Difference: 3200 (3%)

Texel Rate

The Radeon RX 460 will be much (more or less 103%) better at texture filtering than the Radeon HD 4870 2GB. (explain)

Radeon RX 460 61040 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 31040 (103%)

Pixel Rate

The Radeon RX 460 is much (approximately 45%) more effective at AA than the Radeon HD 4870 2GB, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 460 17440 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 5440 (45%)

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

Check prices at:

Radeon RX 460

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 2GB Radeon RX 460
Manufacturer AMD AMD
Year Jun 25, 2008 August 2016
Code Name RV770 XT Polaris 11
Memory 2048 MB 4096 MB
Core Speed 750 MHz 1090 MHz
Memory Speed 3600 MHz 7000 MHz
Power (Max TDP) 150 watts 75 watts
Bandwidth 115200 MB/sec 112000 MB/sec
Texel Rate 30000 Mtexels/sec 61040 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 17440 Mpixels/sec
Unified Shaders 800(160x5) 896
Texture Mapping Units 40 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 14 nm
Transistors 956 million 3000 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few 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 RX 460

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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