GeForce GT 315 vs GeForce GT 320

Intro

Compare those specifications to the GeForce GT 320, which features a clock frequency of 540 MHz and a GDDR3 memory speed of 790 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 72 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GT 315		52 Watts
	Difference: 9 Watts (21%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The GeForce GT 320 should be much (approximately 30%) faster with regards to AF than the GeForce GT 315. (explain)

GeForce GT 320		12960 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 2960 (30%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 315 is the winner, though only just barely. (explain)

GeForce GT 315		5000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 680 (16%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the 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 number of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core 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 rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.