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Radeon HD 6770 vs Radeon HD 7750


The Radeon HD 6770 features a GPU core clock speed of 900 MHz, and the 512 MB of GDDR5 RAM runs at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 TAUs, and 16 ROPs.

Compare that to the Radeon HD 7750, which makes use of a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM works at a frequency of 1125 MHz on this model. It features 512 SPUs as well as 32 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 6770 108 Watts
Difference: 53 Watts (96%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 should be just a bit faster than the Radeon HD 6770 in general. (explain)

Radeon HD 7750 72000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 4800 (7%)

Texel Rate

The Radeon HD 6770 will be quite a bit (approximately 41%) faster with regards to anisotropic filtering than the Radeon HD 7750. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 10400 (41%)

Pixel Rate

The Radeon HD 6770 should be just a bit (about 13%) more effective at full screen anti-aliasing than the Radeon HD 7750, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 1600 (13%)

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 6770

Radeon HD 7750

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.


Display Specifications

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Model Radeon HD 6770 Radeon HD 7750
Manufacturer AMD AMD
Year January 2011 February 2012
Code Name Juniper XT Cape Verde Pro
Memory 512 MB 1024 MB
Core Speed 900 MHz 800 MHz
Memory Speed 4200 MHz 4500 MHz
Power (Max TDP) 108 watts 55 watts
Bandwidth 67200 MB/sec 72000 MB/sec
Texel Rate 36000 Mtexels/sec 25600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 800 512
Texture Mapping Units 40 32
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: Bandwidth is the max amount of information (counted in MB per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, 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, High Dynamic Range and high 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 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.


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