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Radeon HD 6750 vs Radeon HD 6770

Intro

The Radeon HD 6750 uses a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this card. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

Compare those specifications to the Radeon HD 6770, which comes with a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 86 Watts
Radeon HD 6770 108 Watts
Difference: 22 Watts (26%)

Memory Bandwidth

Performance-wise, the Radeon HD 6770 should in theory be just a bit superior to the Radeon HD 6750 overall. (explain)

Radeon HD 6770 67200 MB/sec
Radeon HD 6750 64000 MB/sec
Difference: 3200 (5%)

Texel Rate

The Radeon HD 6770 is a lot (more or less 38%) better at anisotropic filtering than the Radeon HD 6750. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon HD 6750 26100 Mtexels/sec
Difference: 9900 (38%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 is superior to the Radeon HD 6750, by a large margin. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon HD 6750 11600 Mpixels/sec
Difference: 2800 (24%)

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 6750

Amazon.com

Check prices at:

Radeon HD 6770

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 6750 Radeon HD 6770
Manufacturer AMD AMD
Year January 2011 January 2011
Code Name Juniper Pro Juniper XT
Memory 512 MB 512 MB
Core Speed 725 MHz 900 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 86 watts 108 watts
Bandwidth 64000 MB/sec 67200 MB/sec
Texel Rate 26100 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 11600 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 720 800
Texture Mapping Units 36 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1040 million 1040 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 6750

Amazon.com

Check prices at:

Radeon HD 6770

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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