GeForce GT 315 vs GeForce GTX 970M

Intro

Compare those specs to the GeForce GTX 970M, which features a clock speed of 924 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It features 1280 SPUs, 80 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 315		52 Watts
GeForce GTX 970M		75 Watts
	Difference: 23 Watts (44%)

Memory Bandwidth

Performance-wise, the GeForce GTX 970M should theoretically be a lot better than the GeForce GT 315 overall. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 70720 (280%)

Texel Rate

The GeForce GTX 970M should be a lot (approximately 639%) better at AF than the GeForce GT 315. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 63920 (639%)

Pixel Rate

The GeForce GTX 970M will be a lot (about 787%) better at AA than the GeForce GT 315, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 39352 (787%)

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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, 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 per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, 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 amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.