GeForce GT 315 vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which has GPU clock speed of 750 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 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 M295X		125 Watts
	Difference: 73 Watts (140%)

Memory Bandwidth

The Radeon R9 M295X should theoretically be a lot faster than the GeForce GT 315 in general. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 150720 (596%)

Texel Rate

The Radeon R9 M295X should be much (approximately 860%) better at AF than the GeForce GT 315. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 86000 (860%)

Pixel Rate

The Radeon R9 M295X should be quite a bit (approximately 380%) more effective at anti-aliasing than the GeForce GT 315, and should be able to handle higher screen resolutions better. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 19000 (380%)

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 largest amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video 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 maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.