GeForce GT 315 vs Radeon R7 250

Intro

Compare those specifications to the Radeon R7 250, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a frequency of 1150 MHz on this card. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon R7 250		65 Watts
	Difference: 13 Watts (25%)

Memory Bandwidth

Performance-wise, the Radeon R7 250 should in theory be quite a bit better than the GeForce GT 315 in general. (explain)

Radeon R7 250		73600 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 48320 (191%)

Texel Rate

The Radeon R7 250 should be much (more or less 140%) faster with regards to AF than the GeForce GT 315. (explain)

Radeon R7 250		24000 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 14000 (140%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250 is the winner, by a large margin. (explain)

Radeon R7 250		8000 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 3000 (60%)

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 data (measured in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, 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 that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.