Radeon HD 5830 vs Radeon R7 240

Intro

Compare all of that to the Radeon R7 240, which features a clock frequency of 730 MHz and a DDR3 memory speed of 900 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 320 SPUs, 20 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 5830		175 Watts
	Difference: 145 Watts (483%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5830 should theoretically be a lot better than the Radeon R7 240 overall. (explain)

Radeon HD 5830		128000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 99200 (344%)

Texel Rate

The Radeon HD 5830 will be much (approximately 207%) better at texture filtering than the Radeon R7 240. (explain)

Radeon HD 5830		44800 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 30200 (207%)

Pixel Rate

The Radeon HD 5830 should be much (about 119%) more effective at full screen anti-aliasing than the Radeon R7 240, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 5830		12800 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 6960 (119%)

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 megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a 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 speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.