Radeon HD 5770 vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which has a clock speed of 730 MHz and a DDR3 memory speed of 900 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It features 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 5770		108 Watts
	Difference: 78 Watts (260%)

Memory Bandwidth

The Radeon HD 5770 should in theory be a lot faster than the Radeon R7 240 in general. (explain)

Radeon HD 5770		76800 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 48000 (167%)

Texel Rate

The Radeon HD 5770 should be a lot (more or less 133%) better at AF than the Radeon R7 240. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 19400 (133%)

Pixel Rate

The Radeon HD 5770 will be quite a bit (more or less 133%) more effective at anti-aliasing than the Radeon R7 240, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 7760 (133%)

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 information (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.