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Radeon HD 6750 1GB vs Radeon HD 7770

Intro

The Radeon HD 6750 1GB comes with a GPU core clock speed of 725 MHz, and the 1024 MB of GDDR5 RAM runs at 1000 MHz through a 128-bit bus. It also features 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 7770, which features 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 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
Radeon HD 6750 1GB 86 Watts
Difference: 6 Watts (8%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7770 should be 13% faster than the Radeon HD 6750 1GB in general, because of its greater data rate. (explain)

Radeon HD 7770 72000 MB/sec
Radeon HD 6750 1GB 64000 MB/sec
Difference: 8000 (13%)

Texel Rate

The Radeon HD 7770 should be a lot (approximately 53%) better at texture filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 7770 40000 Mtexels/sec
Radeon HD 6750 1GB 26100 Mtexels/sec
Difference: 13900 (53%)

Pixel Rate

The Radeon HD 7770 should be quite a bit (about 38%) faster with regards to full screen anti-aliasing than the Radeon HD 6750 1GB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7770 16000 Mpixels/sec
Radeon HD 6750 1GB 11600 Mpixels/sec
Difference: 4400 (38%)

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

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.

Specifications

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Model Radeon HD 6750 1GB Radeon HD 7770
Manufacturer AMD AMD
Year January 2011 February 2012
Code Name Juniper Pro Cape Verde XT
Memory 1024 MB 1024 MB
Core Speed 725 MHz 1000 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 86 watts 80 watts
Bandwidth 64000 MB/sec 72000 MB/sec
Texel Rate 26100 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 11600 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 720 640
Texture Mapping Units 36 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 1500 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must 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 AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6750 1GB

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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