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

Intro

The Radeon HD 3870 512MB features a GPU clock speed of 775 MHz, and the 512 MB of GDDR3 RAM is set to run at 900 MHz through a 256-bit bus. It also features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.

Compare all of that to the Radeon HD 6570 (OEM) 2GB, which has a clock frequency of 650 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and makes use of 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

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB should in theory be a bit faster 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%) more effective at texture 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 is quite a bit (more or less 138%) more effective at FSAA than the Radeon HD 6570 (OEM) 2GB, and should be able to handle 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: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that can be processed per second. This 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per 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 amount of colour ROPs by the the core 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 rate also depends on lots of other factors, most notably 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 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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