Radeon HD 5750 1GB vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which comes with core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB		86 Watts
Radeon HD 5770		108 Watts
	Difference: 22 Watts (26%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5770 should in theory be just a bit superior to the Radeon HD 5750 1GB in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 3200 (4%)

Texel Rate

The Radeon HD 5770 should be much (approximately 35%) more effective at anisotropic filtering than the Radeon HD 5750 1GB. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 8800 (35%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 5770 is the winner, by far. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 2400 (21%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number 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 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 the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. 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 also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.