Radeon HD 7950 3GB vs Radeon R7 240

Intro

Compare all that to the Radeon R7 240, which comes with a core clock speed of 730 MHz and a DDR3 memory frequency of 900 MHz. It also uses a 128-bit bus, and uses a 28 nm design. It is comprised of 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 7950 3GB		200 Watts
	Difference: 170 Watts (567%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 3GB will be 733% quicker than the Radeon R7 240 overall, because of its higher bandwidth. (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 a lot (more or less 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 using a high screen resolution is important to you, then the Radeon HD 7950 3GB is superior to the Radeon R7 240, 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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.