Radeon HD 5450 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which features core speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon R9 390 8G		275 Watts
	Difference: 256 Watts (1347%)

Memory Bandwidth

Performance-wise, the Radeon R9 390 8G should in theory be a lot superior to the Radeon HD 5450 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 371200 (2900%)

Texel Rate

The Radeon R9 390 8G should be quite a bit (approximately 2977%) more effective at AF than the Radeon HD 5450. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 154800 (2977%)

Pixel Rate

The Radeon R9 390 8G should be much (approximately 2362%) better at anti-aliasing than the Radeon HD 5450, and also will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 61400 (2362%)

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 data (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 can be processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.