GeForce 830M vs GeForce GT 240 GDDR5

Intro

Compare those specifications to the GeForce GT 240 GDDR5, which comes with a clock speed of 550 MHz and a GDDR5 memory frequency of 850 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It features 96 SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 45 Watts (180%)

Memory Bandwidth

The GeForce GT 240 GDDR5, in theory, should be a lot faster than the GeForce 830M in general. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 40000 (278%)

Texel Rate

The GeForce GT 240 GDDR5 should be a little bit (more or less 7%) better at anisotropic filtering than the GeForce 830M. (explain)

GeForce GT 240 GDDR5		17600 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 1136 (7%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 830M is the winner, and very much so. (explain)

GeForce 830M		8232 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 3832 (87%)

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 information (measured in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 applied per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, 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 most pixels the graphics card 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 ROPs by the the core 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 rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.