Radeon HD 5770 vs Radeon HD 6750 1GB

Intro

Compare those specifications to the Radeon HD 6750 1GB, which has GPU core speed of 725 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is made up of 720 SPUs, 36 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
Radeon HD 5770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

The Radeon HD 5770, in theory, should be a small bit faster than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 will be a lot (more or less 30%) faster with regards to AF than the Radeon HD 6750 1GB. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 7900 (30%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5770 is superior to the Radeon HD 6750 1GB, but only just. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 6750 1GB		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 data (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.