Radeon HD 5770 vs Radeon HD 6750

Intro

Compare those specs to the Radeon HD 6750, which has a GPU core clock speed of 725 MHz, and 512 MB of GDDR5 memory running at 1000 MHz through a 128-bit bus. It also is comprised of 720 SPUs, 36 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
Radeon HD 5770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

The Radeon HD 5770, in theory, should perform a small bit faster than the Radeon HD 6750 in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 will be a lot (about 30%) more effective at texture filtering than the Radeon HD 6750. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 7900 (30%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 5770 is superior to the Radeon HD 6750, though only just barely. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 2000 (17%)

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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels that the graphics card could possibly write to the 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 clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.