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Radeon HD 6750 1GB vs Radeon HD 6770 1GB

Intro

The Radeon HD 6750 1GB uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this card. It features 720 SPUs as well as 36 TAUs and 16 ROPs.

Compare those specs to the Radeon HD 6770 1GB, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB 86 Watts
Radeon HD 6770 1GB 108 Watts
Difference: 22 Watts (26%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 1GB is 5% quicker than the Radeon HD 6750 1GB in general, because of its greater data rate. (explain)

Radeon HD 6770 1GB 67200 MB/sec
Radeon HD 6750 1GB 64000 MB/sec
Difference: 3200 (5%)

Texel Rate

The Radeon HD 6770 1GB is quite a bit (about 38%) more effective at anisotropic filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon HD 6750 1GB 26100 Mtexels/sec
Difference: 9900 (38%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6770 1GB is the winner, by far. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon HD 6750 1GB 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 1GB

Amazon.com

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Radeon HD 6770 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 6750 1GB Radeon HD 6770 1GB
Manufacturer AMD AMD
Year January 2011 January 2011
Code Name Juniper Pro Juniper XT
Memory 1024 MB 1024 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 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 applied per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 6750 1GB

Amazon.com

Check prices at:

Radeon HD 6770 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.

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