GeForce GT 315 vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which features a clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon R9 M390X		125 Watts
	Difference: 73 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be quite a bit faster than the GeForce GT 315 overall. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 134720 (533%)

Texel Rate

The Radeon R9 M390X is much (more or less 825%) better at anisotropic filtering than the GeForce GT 315. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 82544 (825%)

Pixel Rate

The Radeon R9 M390X should be quite a bit (about 363%) more effective at AA than the GeForce GT 315, and should be capable of handling higher resolutions more effectively. (explain)

Radeon R9 M390X		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 information (counted in megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.