GeForce 820M vs GeForce GT 430 1GB

Intro

Compare those specs to the GeForce GT 430 1GB, which features clock speeds of 700 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 96 SPUs as well as 16 TAUs and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GT 430 1GB		60 Watts
	Difference: 45 Watts (300%)

Memory Bandwidth

In theory, the GeForce GT 430 1GB is 80% quicker than the GeForce 820M overall, because of its higher bandwidth. (explain)

GeForce GT 430 1GB		28800 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 12800 (80%)

Texel Rate

The GeForce 820M should be a little bit (approximately 3%) more effective at anisotropic filtering than the GeForce GT 430 1GB. (explain)

GeForce 820M		11504 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 304 (3%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 820M is the winner, though only just barely. (explain)

GeForce 820M		2876 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 76 (3%)

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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher 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 could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 max fill rate.