GeForce GT 320 vs GeForce GTX 850M

Intro

Compare those specs to the GeForce GTX 850M, which makes use of a 28 nm design. nVidia has clocked the core frequency at 876 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
GeForce GT 320		43 Watts
	Difference: 3 Watts (8%)

Memory Bandwidth

Performance-wise, the GeForce GTX 850M should in theory be much better than the GeForce GT 320 overall. (explain)

GeForce GTX 850M		32000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 6720 (27%)

Texel Rate

The GeForce GTX 850M will be quite a bit (approximately 170%) faster with regards to AF than the GeForce GT 320. (explain)

GeForce GTX 850M		35040 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 22080 (170%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 850M is a better choice, and very much so. (explain)

GeForce GTX 850M		14016 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 9696 (224%)

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 maximum 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 card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.