GeForce 830M vs GeForce GTX 275

Intro

Compare that to the GeForce GTX 275, which comes with core speeds of 633 MHz on the GPU, and 1134 MHz on the 896 MB of GDDR3 RAM. It features 240 SPUs along with 80 Texture Address Units and 28 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce GTX 275		219 Watts
	Difference: 194 Watts (776%)

Memory Bandwidth

The GeForce GTX 275, in theory, should perform much faster than the GeForce 830M overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 112608 (782%)

Texel Rate

The GeForce GTX 275 is a lot (about 208%) faster with regards to texture filtering than the GeForce 830M. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 34176 (208%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 275 is the winner, and very much so. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 9492 (115%)

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 information (measured in megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one 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 figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.