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

Intro

The Radeon HD 3870 512MB has a GPU clock speed of 775 MHz, and the 512 MB of GDDR3 memory is set to run at 900 MHz through a 256-bit bus. It also features 320(64x5) Stream Processors, 16 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 6570 (OEM) 2GB, which uses a 40 nm design. AMD has set the core frequency at 650 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular model. It features 480 SPUs along with 24 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB 50 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 56 Watts (112%)

Memory Bandwidth

Performance-wise, the Radeon HD 6570 (OEM) 2GB should in theory be a small bit better than the Radeon HD 3870 512MB in general. (explain)

Radeon HD 6570 (OEM) 2GB 64000 MB/sec
Radeon HD 3870 512MB 57600 MB/sec
Difference: 6400 (11%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB will be a lot (more or less 26%) better at anisotropic filtering than the Radeon HD 3870 512MB. (explain)

Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 3200 (26%)

Pixel Rate

The Radeon HD 3870 512MB should be much (about 138%) better at full screen anti-aliasing than the Radeon HD 6570 (OEM) 2GB, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 7200 (138%)

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 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 512MB Radeon HD 6570 (OEM) 2GB
Manufacturer AMD AMD
Year Nov 19, 2007 February 2011
Code Name RV670 XT Turks
Memory 512 MB 1024 MB
Core Speed 775 MHz 650 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 106 watts 50 watts
Bandwidth 57600 MB/sec 64000 MB/sec
Texel Rate 12400 Mtexels/sec 15600 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 5200 Mpixels/sec
Unified Shaders 320(64x5) 480
Texture Mapping Units 16 24
Render Output Units 16 8
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 55 nm 40 nm
Transistors (Unknown) million 715 million
Bus PCIe 2.0 x16/AGP 8x PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 3870 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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