GeForce 930M vs GeForce GT 315

Intro

Compare those specifications to the GeForce GT 315, which comes with a GPU core clock speed of 625 MHz, and 512 MB of DDR3 RAM set to run at 790 MHz through a 128-bit bus. It also features 48 SPUs, 16 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GT 315 should theoretically perform quite a bit faster than the GeForce 930M in general. (explain)

GeForce GT 315		25280 MB/sec
GeForce 930M		14400 MB/sec
	Difference: 10880 (76%)

Texel Rate

The GeForce 930M should be a lot (about 123%) better at texture filtering than the GeForce GT 315. (explain)

GeForce 930M		22272 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 12272 (123%)

Pixel Rate

The GeForce 930M should be a lot (approximately 48%) more effective at anti-aliasing than the GeForce GT 315, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce 930M		7424 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 2424 (48%)

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 max amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.