Radeon HD 5830 vs Radeon R7 250X

Intro

Compare those specifications to the Radeon R7 250X, which comes with core clock speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X		95 Watts
Radeon HD 5830		175 Watts
	Difference: 80 Watts (84%)

Memory Bandwidth

The Radeon HD 5830 should in theory perform quite a bit faster than the Radeon R7 250X in general. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R7 250X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The Radeon HD 5830 should be a small bit (more or less 12%) faster with regards to texture filtering than the Radeon R7 250X. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon R7 250X		40000 Mtexels/sec
	Difference: 4800 (12%)

Pixel Rate

The Radeon R7 250X will be a lot (about 25%) better at FSAA than the Radeon HD 5830, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R7 250X		16000 Mpixels/sec
Radeon HD 5830		12800 Mpixels/sec
	Difference: 3200 (25%)

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 transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.