Radeon HD 5450 vs Radeon R9 270X

Intro

Compare all of that to the Radeon R9 270X, which has a clock frequency of 1000 MHz and a GDDR5 memory speed of 1400 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon R9 270X		180 Watts
	Difference: 161 Watts (847%)

Memory Bandwidth

Performance-wise, the Radeon R9 270X should theoretically be quite a bit better than the Radeon HD 5450 overall. (explain)

Radeon R9 270X		179200 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 166400 (1300%)

Texel Rate

The Radeon R9 270X will be much (about 1438%) better at AF than the Radeon HD 5450. (explain)

Radeon R9 270X		80000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 74800 (1438%)

Pixel Rate

The Radeon R9 270X will be much (about 1131%) better at FSAA than the Radeon HD 5450, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 270X		32000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 29400 (1131%)

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 maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.