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Radeon HD 4870 512MB vs Radeon R7 240

Intro

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

Compare those specifications to the Radeon R7 240, which uses a 28 nm design. AMD has set the core speed at 730 MHz. The DDR3 RAM works at a frequency of 900 MHz on this specific model. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240 30 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 120 Watts (400%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 512MB should perform quite a bit faster than the Radeon R7 240 overall. (explain)

Radeon HD 4870 512MB 115200 MB/sec
Radeon R7 240 28800 MB/sec
Difference: 86400 (300%)

Texel Rate

The Radeon HD 4870 512MB is quite a bit (about 105%) more effective at anisotropic filtering than the Radeon R7 240. (explain)

Radeon HD 4870 512MB 30000 Mtexels/sec
Radeon R7 240 14600 Mtexels/sec
Difference: 15400 (105%)

Pixel Rate

The Radeon HD 4870 512MB will be a lot (more or less 105%) more effective at anti-aliasing than the Radeon R7 240, and also capable of handling higher screen resolutions better. (explain)

Radeon HD 4870 512MB 12000 Mpixels/sec
Radeon R7 240 5840 Mpixels/sec
Difference: 6160 (105%)

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

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Radeon R7 240

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 512MB Radeon R7 240
Manufacturer AMD AMD
Year Jun 25, 2008 October 2013
Code Name RV770 XT Oland PRO
Memory 512 MB 2048 MB
Core Speed 750 MHz 730 MHz
Memory Speed 3600 MHz 1800 MHz
Power (Max TDP) 150 watts 30 watts
Bandwidth 115200 MB/sec 28800 MB/sec
Texel Rate 30000 Mtexels/sec 14600 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 5840 Mpixels/sec
Unified Shaders 800(160x5) 320
Texture Mapping Units 40 20
Render Output Units 16 8
Bus Type GDDR5 DDR3
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors 956 million 1040 million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 4870 512MB

Amazon.com

Check prices at:

Radeon R7 240

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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