GeForce GT 240 GDDR5 1GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which makes use of a 28 nm design. AMD has clocked the core speed at 730 MHz. The DDR3 memory is set to run at a frequency of 900 MHz on this specific model. It features 320 SPUs along with 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
GeForce GT 240 GDDR5 1GB		70 Watts
	Difference: 40 Watts (133%)

Memory Bandwidth

The GeForce GT 240 GDDR5 1GB, in theory, should perform a lot faster than the Radeon R7 240 overall. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 25600 (89%)

Texel Rate

The GeForce GT 240 GDDR5 1GB will be much (about 21%) better at anisotropic filtering than the Radeon R7 240. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 3000 (21%)

Pixel Rate

The Radeon R7 240 should be a lot (approximately 33%) more effective at anti-aliasing than the GeForce GT 240 GDDR5 1GB, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R7 240		5840 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 1440 (33%)

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 maximum amount of information (counted in megabytes per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.