GeForce GT 315 vs Radeon R9 380 4G

Intro

Compare those specs to the Radeon R9 380 4G, which has core clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

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

The Radeon R9 380 4G should in theory perform a lot faster than the GeForce GT 315 overall. (explain)

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

Texel Rate

The Radeon R9 380 4G is quite a bit (about 986%) better at texture filtering than the GeForce GT 315. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 380 4G is the winner, and very much so. (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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.