Radeon HD 5750 1GB vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which features a core clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 800(160x5) SPUs, 40 TAUs, 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

Theoretically, the Radeon HD 5770 should be a small bit faster than the Radeon HD 5750 1GB overall. (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 a lot (about 35%) faster with regards to 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 using high levels of AA is important to you, then the Radeon HD 5770 is the winner, and very much so. (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: Bandwidth is the max amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling 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 that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.