GeForce GTX 285 2GB vs GeForce GTX 860M

Intro

Compare all that to the GeForce GTX 860M, which has clock speeds of 797 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1152 SPUs along with 96 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 159 Watts (353%)

Memory Bandwidth

The GeForce GTX 285 2GB should in theory be a lot faster than the GeForce GTX 860M overall. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 94976 (148%)

Texel Rate

The GeForce GTX 860M is a lot (about 48%) better at texture filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 24672 (48%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 285 2GB is a better choice, by far. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 7984 (63%)

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 largest amount of data (counted in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.