Radeon HD 5450 vs Radeon HD 5750 512MB

Intro

Compare those specs to the Radeon HD 5750 512MB, which uses a 40 nm design. AMD has clocked the core frequency at 700 MHz. The GDDR5 RAM works at a frequency of 1150 MHz on this model. It features 720(144x5) SPUs along with 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon HD 5750 512MB		86 Watts
	Difference: 67 Watts (353%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5750 512MB should be quite a bit faster than the Radeon HD 5450 overall. (explain)

Radeon HD 5750 512MB		73600 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 60800 (475%)

Texel Rate

The Radeon HD 5750 512MB will be a lot (about 385%) better at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon HD 5750 512MB		25200 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 20000 (385%)

Pixel Rate

The Radeon HD 5750 512MB will be much (approximately 331%) more effective at FSAA than the Radeon HD 5450, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 5750 512MB		11200 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 8600 (331%)

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 maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 reach the maximum fill rate.