Radeon HD 5850 vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which uses a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1125 MHz on this model. It features 512 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 5850		151 Watts
	Difference: 96 Watts (175%)

Memory Bandwidth

The Radeon HD 5850 should theoretically perform much faster than the Radeon HD 7750 in general. (explain)

Radeon HD 5850		128000 MB/sec
Radeon HD 7750		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5850 will be a lot (approximately 104%) better at AF than the Radeon HD 7750. (explain)

Radeon HD 5850		52200 Mtexels/sec
Radeon HD 7750		25600 Mtexels/sec
	Difference: 26600 (104%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5850 is superior to the Radeon HD 7750, by a large margin. (explain)

Radeon HD 5850		23200 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 10400 (81%)

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 (counted in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel 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 get to the maximum fill rate.