GeForce 820M vs GeForce GT 440 1.5GB

Intro

Compare those specifications to the GeForce GT 440 1.5GB, which features a GPU core clock speed of 594 MHz, and 1536 MB of GDDR3 RAM set to run at 900 MHz through a 192-bit bus. It also is made up of 144 Stream Processors, 24 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

Hide Graphs

Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce 820M		850 points
GeForce GT 440 1.5GB		840 points
	Difference: 10 (1%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GT 440 1.5GB		56 Watts
	Difference: 41 Watts (273%)

Memory Bandwidth

Performance-wise, the GeForce GT 440 1.5GB should theoretically be quite a bit better than the GeForce 820M overall. (explain)

GeForce GT 440 1.5GB		43200 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 27200 (170%)

Texel Rate

The GeForce GT 440 1.5GB will be quite a bit (about 24%) faster with regards to AF than the GeForce 820M. (explain)

GeForce GT 440 1.5GB		14256 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 2752 (24%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GT 440 1.5GB is the winner, by far. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 11380 (396%)

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 MB per second) that can be moved across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.