GeForce GT 315 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which comes with a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

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

The Radeon R9 M395X should in theory perform much faster 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 will be quite a bit (approximately 825%) more effective 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 is much (approximately 363%) better at anti-aliasing than the GeForce GT 315, and also capable of handling higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 can be processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.