GeForce 830M vs GeForce GTX 285 2GB

Intro

Compare those specs to the GeForce GTX 285 2GB, which makes use of a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 RAM works at a speed of 1242 MHz on this particular card. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 179 Watts (716%)

Memory Bandwidth

The GeForce GTX 285 2GB should in theory be much faster than the GeForce 830M in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 144576 (1004%)

Texel Rate

The GeForce GTX 285 2GB will be a lot (approximately 215%) more effective at texture filtering than the GeForce 830M. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 35376 (215%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 285 2GB is superior to the GeForce 830M, by far. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 12504 (152%)

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 (counted in MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.