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

Intro

The Radeon HD 6570 (OEM) 2GB has 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 makes use of a 40 nm design. It is comprised of 480 SPUs, 24 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 6670 (OEM) 1GB, which has a clock frequency of 800 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 480 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

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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 the exact same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is quite a bit (about 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

The Radeon HD 6670 (OEM) 1GB should be much (approximately 23%) more effective at FSAA than the Radeon HD 6570 (OEM) 2GB, and should be able to handle higher screen resolutions without losing too much performance. (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 max amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill 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 ability to reach the max 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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