GeForce GT 315 vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which features a core 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 is made up of 320 SPUs, 20 TAUs, 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 315		52 Watts
	Difference: 22 Watts (73%)

Memory Bandwidth

Theoretically speaking, the Radeon R7 240 should be a little bit faster than the GeForce GT 315 overall. (explain)

Radeon R7 240		28800 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 3520 (14%)

Texel Rate

The Radeon R7 240 will be much (approximately 46%) better at texture filtering than the GeForce GT 315. (explain)

Radeon R7 240		14600 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 4600 (46%)

Pixel Rate

The Radeon R7 240 should be just a bit (more or less 17%) better at anti-aliasing than the GeForce GT 315, and should be able to handle higher resolutions better. (explain)

Radeon R7 240		5840 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 840 (17%)

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 information (measured in MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the 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 graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.