GeForce 820M vs GeForce GT 230

Intro

Compare that to the GeForce GT 230, which comes with core speeds of 550 MHz on the GPU, and 800 MHz on the 1536 MB of DDR3 RAM. It features 32 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GT 230		65 Watts
	Difference: 50 Watts (333%)

Memory Bandwidth

The GeForce GT 230 should in theory perform much faster than the GeForce 820M overall. (explain)

GeForce GT 230		38400 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 22400 (140%)

Texel Rate

The GeForce 820M will be a lot (about 31%) more effective at anisotropic filtering than the GeForce GT 230. (explain)

GeForce 820M		11504 Mtexels/sec
GeForce GT 230		8800 Mtexels/sec
	Difference: 2704 (31%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 230 is the winner, by far. (explain)

GeForce GT 230		4400 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 1524 (53%)

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 MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.