Radeon HD 6750 vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which comes with core clock speeds of 900 MHz on the GPU, and 1050 MHz on the 512 MB of GDDR5 RAM. It features 800 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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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

In theory, the Radeon HD 6770 will be 5% faster than the Radeon HD 6750 overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6770 is much (about 38%) more effective 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

The Radeon HD 6770 should be a lot (approximately 24%) faster with regards to AA than the Radeon HD 6750, and capable of handling higher resolutions more effectively. (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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 texture map elements (texels) that can be applied per second. This number 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.