GeForce 830M vs GeForce 9400 GT 256MB

Intro

Compare all of that to the GeForce 9400 GT 256MB, which has a clock frequency of 550 MHz and a GDDR2 memory speed of 400 MHz. It also features a 128-bit memory bus, and uses a 65 nm design. It features 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
GeForce 9400 GT 256MB		50 Watts
	Difference: 25 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce 830M is 13% quicker than the GeForce 9400 GT 256MB overall, due to its greater data rate. (explain)

GeForce 830M		14400 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 830M is quite a bit (more or less 274%) more effective at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 830M		16464 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 12064 (274%)

Pixel Rate

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

GeForce 830M		8232 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 6032 (274%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.