GeForce GT 315 vs Radeon R9 M280X

Intro

Compare those specs to the Radeon R9 M280X, which comes with a core clock speed of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon R9 M280X		75 Watts
	Difference: 23 Watts (44%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M280X is 248% faster than the GeForce GT 315 in general, because of its higher bandwidth. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 62720 (248%)

Texel Rate

The Radeon R9 M280X will be a lot (more or less 404%) faster with regards to anisotropic filtering than the GeForce GT 315. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 40400 (404%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M280X is a better choice, by far. (explain)

Radeon R9 M280X		14400 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 9400 (188%)

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 data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core 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 output rate also depends 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.