GeForce GT 315 vs Radeon HD 7950

Intro

Compare that to the Radeon HD 7950, which uses a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this card. It features 1792 SPUs as well as 112 TAUs 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		200 Watts
	Difference: 148 Watts (285%)

Memory Bandwidth

Theoretically, the Radeon HD 7950 should be much faster than the GeForce GT 315 overall. (explain)

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

Texel Rate

The Radeon HD 7950 should be a lot (approximately 796%) better at AF than the GeForce GT 315. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7950 is a better choice, by a large margin. (explain)

Radeon HD 7950		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 maximum amount of data (counted in MB per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of 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 also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.