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Radeon HD 3870 512MB vs Radeon R7 250X

Intro

The Radeon HD 3870 512MB has core clock speeds of 775 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon R7 250X, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 95 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 11 Watts (12%)

Memory Bandwidth

The Radeon R7 250X should in theory perform quite a bit faster than the Radeon HD 3870 512MB overall. (explain)

Radeon R7 250X 72000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 14400 (25%)

Texel Rate

The Radeon R7 250X will be quite a bit (more or less 223%) more effective at anisotropic filtering than the Radeon HD 3870 512MB. (explain)

Radeon R7 250X 40000 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 27600 (223%)

Pixel Rate

The Radeon R7 250X should be much (more or less 29%) better at AA than the Radeon HD 3870 512MB, and also will be able to handle higher resolutions while still performing well. (explain)

Radeon R7 250X 16000 Mpixels/sec
Radeon HD 3870 512MB 12400 Mpixels/sec
Difference: 3600 (29%)

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

Check prices at:

Radeon R7 250X

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 3870 512MB Radeon R7 250X
Manufacturer AMD AMD
Year Nov 19, 2007 February 2014
Code Name RV670 XT Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 775 MHz 1000 MHz
Memory Speed 1800 MHz 4500 MHz
Power (Max TDP) 106 watts 95 watts
Bandwidth 57600 MB/sec 72000 MB/sec
Texel Rate 12400 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 320(64x5) 640
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million 1500 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 maximum amount of data (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. 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 rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon R7 250X

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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