GeForce GT 315 vs Geforce GTX 770

Intro

Compare those specs to the Geforce GTX 770, which comes with core clock speeds of 1046 MHz on the GPU, and 1753 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 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
Geforce GTX 770		230 Watts
	Difference: 178 Watts (342%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 770 should be quite a bit faster than the GeForce GT 315 in general. (explain)

Geforce GTX 770		224384 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 199104 (788%)

Texel Rate

The Geforce GTX 770 is a lot (more or less 1239%) faster with regards to AF than the GeForce GT 315. (explain)

Geforce GTX 770		133888 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 123888 (1239%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 770 is a better choice, and very much so. (explain)

Geforce GTX 770		33472 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 28472 (569%)

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 moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel 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 maximum fill rate.