Radeon HD 5450 vs Radeon R9 280X

Intro

Compare all of that to the Radeon R9 280X, which comes with a clock frequency of 850 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 384-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon R9 280X		250 Watts
	Difference: 231 Watts (1216%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 280X will be 2150% quicker than the Radeon HD 5450 in general, because of its higher bandwidth. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 275200 (2150%)

Texel Rate

The Radeon R9 280X should be a lot (about 1992%) more effective at texture filtering than the Radeon HD 5450. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 103600 (1992%)

Pixel Rate

The Radeon R9 280X is a lot (more or less 946%) faster with regards to FSAA than the Radeon HD 5450, and should be able to handle higher screen resolutions better. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 24600 (946%)

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 megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of 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 also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.