Radeon HD 4850 X2 1GB vs Radeon HD 5750 1GB

Intro

Compare those specs to the Radeon HD 5750 1GB, which features a clock speed of 700 MHz and a GDDR5 memory frequency of 1150 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is comprised of 720(144x5) SPUs, 36 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 4850 X2 1GB		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 1GB should theoretically be a lot better than the Radeon HD 5750 1GB in general. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
Radeon HD 5750 1GB		73600 MB/sec
	Difference: 53504 (73%)

Texel Rate

The Radeon HD 4850 X2 1GB should be much (about 98%) faster with regards to AF than the Radeon HD 5750 1GB. (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
Radeon HD 5750 1GB		25200 Mtexels/sec
	Difference: 24800 (98%)

Pixel Rate

The Radeon HD 4850 X2 1GB will be quite a bit (about 79%) better at full screen anti-aliasing than the Radeon HD 5750 1GB, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
Radeon HD 5750 1GB		11200 Mpixels/sec
	Difference: 8800 (79%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 most pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.