Radeon HD 5450 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which has a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 512-bit memory bus, and uses a 28 nm design. It features 2560 SPUs, 160 Texture Address Units, and 64 Raster Operation Units.

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

Theoretically speaking, the Radeon R9 390 8G is 2900% quicker than the Radeon HD 5450 in general, due to its higher bandwidth. (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 a lot (more or less 2977%) faster with regards to anisotropic filtering 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 quite a bit (about 2362%) faster with regards to AA than the Radeon HD 5450, and also should be capable of handling higher resolutions while still performing well. (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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.