GeForce 830M vs Geforce GTX 780

Intro

Compare those specifications to the Geforce GTX 780, which features core clock speeds of 863 MHz on the GPU, and 1502 MHz on the 3072 MB of GDDR5 memory. It features 2304 SPUs as well as 192 Texture Address Units and 48 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Geforce GTX 780		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 will be 1903% quicker than the GeForce 830M overall, due to its greater bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 273984 (1903%)

Texel Rate

The Geforce GTX 780 will be quite a bit (approximately 906%) more effective at AF than the GeForce 830M. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 149232 (906%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 780 is a better choice, by far. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 33192 (403%)

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 data (measured in megabytes per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core 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 that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.