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Radeon HD 3870 512MB vs Radeon R7 260X

Intro

The Radeon HD 3870 512MB makes use of a 55 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this specific model. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.

Compare that to the Radeon R7 260X, which features clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 memory. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3870 512MB 106 Watts
Radeon R7 260X 115 Watts
Difference: 9 Watts (8%)

Memory Bandwidth

The Radeon R7 260X should in theory perform quite a bit faster than the Radeon HD 3870 512MB in general. (explain)

Radeon R7 260X 104000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 46400 (81%)

Texel Rate

The Radeon R7 260X will be much (about 397%) more effective at texture filtering than the Radeon HD 3870 512MB. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 49200 (397%)

Pixel Rate

The Radeon R7 260X should be quite a bit (approximately 42%) faster with regards to anti-aliasing than the Radeon HD 3870 512MB, and also will be able to handle higher resolutions better. (explain)

Radeon R7 260X 17600 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 5200 (42%)

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 3870 512MB

Amazon.com

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Radeon R7 260X

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 3870 512MB Radeon R7 260X
Manufacturer AMD AMD
Year Nov 19, 2007 October 2013
Code Name RV670 XT Bonaire XTX
Memory 512 MB 2048 MB
Core Speed 775 MHz 1100 MHz
Memory Speed 1800 MHz 6500 MHz
Power (Max TDP) 106 watts 115 watts
Bandwidth 57600 MB/sec 104000 MB/sec
Texel Rate 12400 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 320(64x5) 896
Texture Mapping Units 16 56
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 2080 million
Bus PCIe 2.0 x16/AGP 8x 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 data (counted in MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a 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 - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon R7 260X

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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