GeForce GT 315 vs Radeon HD 7950 3GB

Intro

Compare that to the Radeon HD 7950 3GB, which has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs as well as 112 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 HD 7950 3GB		200 Watts
	Difference: 148 Watts (285%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB is 849% faster than the GeForce GT 315 in general, due to its greater bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 214720 (849%)

Texel Rate

The Radeon HD 7950 3GB is a lot (more or less 796%) faster with regards to texture filtering than the GeForce GT 315. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 79600 (796%)

Pixel Rate

The Radeon HD 7950 3GB will be a lot (about 412%) more effective at FSAA than the GeForce GT 315, and capable of handling higher resolutions better. (explain)

Radeon HD 7950 3GB		25600 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 20600 (412%)

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 information (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant 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.