Radeon HD 7950 3GB vs Radeon R7 240

Intro

Compare that to the Radeon R7 240, which features GPU clock speed of 730 MHz, and 2048 MB of DDR3 memory running at 900 MHz through a 128-bit bus. It also is made up of 320 Stream Processors, 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 7950 3GB		200 Watts
	Difference: 170 Watts (567%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB is 733% faster than the Radeon R7 240 overall, because of its higher data rate. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 211200 (733%)

Texel Rate

The Radeon HD 7950 3GB will be much (approximately 514%) better at texture filtering than the Radeon R7 240. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 75000 (514%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 3GB is a better choice, by far. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 19760 (338%)

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 max amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.