GeForce GT 315 vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which features a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also features 1792 Stream Processors, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon R9 380 4G		190 Watts
	Difference: 138 Watts (265%)

Memory Bandwidth

In theory, the Radeon R9 380 4G should perform much faster than the GeForce GT 315 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 157120 (622%)

Texel Rate

The Radeon R9 380 4G should be a lot (more or less 986%) better at AF than the GeForce GT 315. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 98640 (986%)

Pixel Rate

The Radeon R9 380 4G will be a lot (more or less 521%) more effective at FSAA than the GeForce GT 315, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 26040 (521%)

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 largest amount of information (counted in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.