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Radeon HD 3870 X2 512MB vs Radeon HD 6570 (OEM) 2GB

Intro

The Radeon HD 3870 X2 512MB comes with core speeds of 825 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Compare all of that to the Radeon HD 6570 (OEM) 2GB, which features a core clock speed of 650 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 3870 X2 512MB should theoretically be much better than the Radeon HD 6570 (OEM) 2GB in general. (explain)

Radeon HD 3870 X2 512MB 115200 MB/sec
Radeon HD 6570 (OEM) 2GB 64000 MB/sec
Difference: 51200 (80%)

Texel Rate

The Radeon HD 3870 X2 512MB is much (more or less 69%) better at texture filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 3870 X2 512MB 26400 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 10800 (69%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 3870 X2 512MB is a better choice, by far. (explain)

Radeon HD 3870 X2 512MB 26400 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 21200 (408%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 3870 X2 512MB

Amazon.com

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Radeon HD 6570 (OEM) 2GB

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 X2 512MB Radeon HD 6570 (OEM) 2GB
Manufacturer AMD AMD
Year Jan 28, 2008 February 2011
Code Name R680 Turks
Memory 512 MB (x2) 1024 MB
Core Speed 825 MHz (x2) 650 MHz
Memory Speed 1800 MHz (x2) 4000 MHz
Power (Max TDP) (Unknown) watts 50 watts
Bandwidth 115200 MB/sec 64000 MB/sec
Texel Rate 26400 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 26400 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 320(64x5) (x2) 480
Texture Mapping Units 16 (x2) 24
Render Output Units 16 (x2) 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 715 million
Bus PCIe 2.0 x16/(internal PCIe 1.1 x16) PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 3870 X2 512MB

Amazon.com

Check prices at:

Radeon HD 6570 (OEM) 2GB

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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