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Radeon HD 6570 (OEM) 2GB vs Radeon HD 6670 (OEM) 1GB

Intro

The Radeon HD 6570 (OEM) 2GB uses a 40 nm design. AMD has clocked the core speed at 650 MHz. The GDDR5 memory works at a frequency of 1000 MHz on this particular model. It features 480 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which comes with core clock speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. 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 6670 (OEM) 1GB 63 Watts
Difference: 13 Watts (26%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The Radeon HD 6670 (OEM) 1GB will be quite a bit (more or less 23%) more effective at AF than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 3600 (23%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6670 (OEM) 1GB is superior to the Radeon HD 6570 (OEM) 2GB, by far. (explain)

Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 1200 (23%)

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 6570 (OEM) 2GB

Amazon.com

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Radeon HD 6670 (OEM) 1GB

Amazon.com

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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 6570 (OEM) 2GB Radeon HD 6670 (OEM) 1GB
Manufacturer AMD AMD
Year February 2011 February 2011
Code Name Turks Turks
Memory 1024 MB 1024 MB
Core Speed 650 MHz 800 MHz
Memory Speed 4000 MHz 4000 MHz
Power (Max TDP) 50 watts 63 watts
Bandwidth 64000 MB/sec 64000 MB/sec
Texel Rate 15600 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 5200 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 480 480
Texture Mapping Units 24 24
Render Output Units 8 8
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 715 million 715 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per 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 - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 6570 (OEM) 2GB

Amazon.com

Check prices at:

Radeon HD 6670 (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.

Comments

3 Responses to “Radeon HD 6570 (OEM) 2GB vs Radeon HD 6670 (OEM) 1GB”
MPW says:

The HD 6570 (2GB) has 2024 MB Memory of course 🙂

Retard says:

o really??? ithought it was something else

Correction says:

I believe he meant 2048 MB, good job both MPW and Retard.

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