GeForce GT 315 vs Radeon HD 7850

Intro

Compare those specifications to the Radeon HD 7850, which has core speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs as well as 64 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
Radeon HD 7850		130 Watts
	Difference: 78 Watts (150%)

Memory Bandwidth

In theory, the Radeon HD 7850 will be 508% quicker than the GeForce GT 315 overall, due to its higher bandwidth. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 128320 (508%)

Texel Rate

The Radeon HD 7850 will be much (approximately 450%) better at anisotropic filtering than the GeForce GT 315. (explain)

Radeon HD 7850		55040 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 45040 (450%)

Pixel Rate

The Radeon HD 7850 should be much (approximately 450%) faster with regards to AA than the GeForce GT 315, and able to handle higher screen resolutions better. (explain)

Radeon HD 7850		27520 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 22520 (450%)

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 (in units of megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling 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 card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.