GeForce GT 315 vs Radeon R9 M385X

Intro

Compare all that to the Radeon R9 M385X, which comes with GPU clock speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M385X is 280% faster than the GeForce GT 315 overall, due to its greater bandwidth. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 70720 (280%)

Texel Rate

The Radeon R9 M385X will be much (about 516%) faster with regards to anisotropic filtering than the GeForce GT 315. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 51600 (516%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M385X is the winner, and very much so. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 12600 (252%)

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 data (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher 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 most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.