Radeon HD 5450 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features a clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 512-bit bus, and uses a 28 nm design. It is made up of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

Hide Graphs

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

The Radeon R9 390 8G should in theory perform quite a bit faster than 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 will be quite a bit (more or less 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 will be a lot (about 2362%) faster with regards to full screen anti-aliasing than the Radeon HD 5450, and will be capable of handling higher screen 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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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 clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.