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Radeon HD 4870 2GB vs Radeon R7 240

Intro

The Radeon HD 4870 2GB uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this model. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare all that to the Radeon R7 240, which has a clock frequency of 730 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240 30 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 120 Watts (400%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 2GB should in theory be quite a bit superior to the Radeon R7 240 in general. (explain)

Radeon HD 4870 2GB 115200 MB/sec
Radeon R7 240 28800 MB/sec
Difference: 86400 (300%)

Texel Rate

The Radeon HD 4870 2GB will be a lot (about 105%) more effective at AF than the Radeon R7 240. (explain)

Radeon HD 4870 2GB 30000 Mtexels/sec
Radeon R7 240 14600 Mtexels/sec
Difference: 15400 (105%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 4870 2GB is superior to the Radeon R7 240, and very much so. (explain)

Radeon HD 4870 2GB 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 2GB

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 2GB Radeon R7 240
Manufacturer AMD AMD
Year Jun 25, 2008 October 2013
Code Name RV770 XT Oland PRO
Memory 2048 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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video 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 can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 2GB

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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