GeForce 940M vs GeForce GT 315

Intro

Compare all that to the GeForce GT 315, which comes with GPU core speed of 625 MHz, and 512 MB of DDR3 RAM running at 790 MHz through a 128-bit bus. It also is made up of 48 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GT 315 should theoretically be quite a bit superior to the GeForce 940M in general. (explain)

GeForce GT 315		25280 MB/sec
GeForce 940M		16000 MB/sec
	Difference: 9280 (58%)

Texel Rate

The GeForce 940M should be a lot (more or less 157%) better at anisotropic filtering than the GeForce GT 315. (explain)

GeForce 940M		25728 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 15728 (157%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce 940M is superior to the GeForce GT 315, by a large margin. (explain)

GeForce 940M		8576 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 3576 (72%)

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 (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, 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 number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.