Radeon HD 5450 vs Radeon R7 250X

Intro

Compare those specifications to the Radeon R7 250X, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM is set to run at a frequency of 1125 MHz on this specific model. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
Radeon R7 250X		95 Watts
	Difference: 76 Watts (400%)

Memory Bandwidth

Performance-wise, the Radeon R7 250X should in theory be quite a bit superior to the Radeon HD 5450 overall. (explain)

Radeon R7 250X		72000 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R7 250X will be much (more or less 669%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

Radeon R7 250X		40000 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 34800 (669%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250X is a better choice, and very much so. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 13400 (515%)

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 data (in units of MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.