Radeon HD 5450 vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which has GPU clock speed of 970 MHz, and 4096 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 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 380 4G		190 Watts
	Difference: 171 Watts (900%)

Memory Bandwidth

Theoretically, the Radeon R9 380 4G should be much faster than the Radeon HD 5450 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 169600 (1325%)

Texel Rate

The Radeon R9 380 4G is much (more or less 1989%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 103440 (1989%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 380 4G is superior to the Radeon HD 5450, and very much so. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 28440 (1094%)

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 (measured in megabytes per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on 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 reach the maximum fill rate.