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Radeon HD 3870 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

The Radeon HD 3870 512MB comes with 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 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6570 (OEM) 1GB, which has core speeds of 650 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 RAM. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB 50 Watts
Radeon HD 3870 512MB 106 Watts
Difference: 56 Watts (112%)

Memory Bandwidth

The Radeon HD 3870 512MB, in theory, should be quite a bit faster than the Radeon HD 6570 (OEM) 1GB overall. (explain)

Radeon HD 3870 512MB 57600 MB/sec
Radeon HD 6570 (OEM) 1GB 28800 MB/sec
Difference: 28800 (100%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB is much (more or less 26%) more effective at texture filtering than the Radeon HD 3870 512MB. (explain)

Radeon HD 6570 (OEM) 1GB 15600 Mtexels/sec
Radeon HD 3870 512MB 12400 Mtexels/sec
Difference: 3200 (26%)

Pixel Rate

The Radeon HD 3870 512MB is quite a bit (about 138%) more effective at FSAA than the Radeon HD 6570 (OEM) 1GB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 3870 512MB 12400 Mpixels/sec
Radeon HD 6570 (OEM) 1GB 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) 1GB

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) 1GB
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 1800 MHz
Power (Max TDP) 106 watts 50 watts
Bandwidth 57600 MB/sec 28800 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 GDDR3
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: Bandwidth is the max amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at 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 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 Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 512MB

Amazon.com

Check prices at:

Radeon HD 6570 (OEM) 1GB

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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