GeForce GT 340 1GB vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which has GPU clock speed of 954 MHz, and 4096 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also features 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
GeForce GTX 880M		130 Watts
	Difference: 61 Watts (88%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 880M should theoretically be much better than the GeForce GT 340 1GB overall. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 73600 (135%)

Texel Rate

The GeForce GTX 880M is a lot (more or less 594%) more effective at anisotropic filtering than the GeForce GT 340 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 104512 (594%)

Pixel Rate

The GeForce GTX 880M is much (approximately 594%) more effective at AA than the GeForce GT 340 1GB, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 26128 (594%)

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 (in units of MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it 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 high resolutions.

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

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