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Radeon HD 6570 (OEM) 2GB vs Radeon HD 7770

Intro

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

Compare those specifications to the Radeon HD 7770, which has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 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 7770 80 Watts
Difference: 30 Watts (60%)

Memory Bandwidth

The Radeon HD 7770 should in theory perform just a bit faster than the Radeon HD 6570 (OEM) 2GB in general. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 6570 (OEM) 2GB 64000 MB/sec
Difference: 8000 (13%)

Texel Rate

The Radeon HD 7770 should be quite a bit (more or less 156%) better at anisotropic filtering than the Radeon HD 6570 (OEM) 2GB. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 6570 (OEM) 2GB 15600 Mtexels/sec
Difference: 24400 (156%)

Pixel Rate

The Radeon HD 7770 will be a lot (approximately 208%) faster with regards to AA than the Radeon HD 6570 (OEM) 2GB, and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon HD 6570 (OEM) 2GB 5200 Mpixels/sec
Difference: 10800 (208%)

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 7770

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 7770
Manufacturer AMD AMD
Year February 2011 February 2012
Code Name Turks Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 650 MHz 1000 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 50 watts 80 watts
Bandwidth 64000 MB/sec 72000 MB/sec
Texel Rate 15600 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 5200 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 480 640
Texture Mapping Units 24 40
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 715 million 1500 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the card's interface 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 memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at 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 that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential 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 7770

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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