GeForce GT 315 vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which features clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 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 M395X		125 Watts
	Difference: 73 Watts (140%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M395X should theoretically be much better than the GeForce GT 315 in general. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 134720 (533%)

Texel Rate

The Radeon R9 M395X should be a lot (about 825%) better at AF than the GeForce GT 315. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 82544 (825%)

Pixel Rate

The Radeon R9 M395X should be quite a bit (more or less 363%) faster with regards to FSAA than the GeForce GT 315, and capable of handling higher screen resolutions better. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 18136 (363%)

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 maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 are processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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