GeForce 820M vs GeForce GT 440 1.5GB

Intro

Compare all of that to the GeForce GT 440 1.5GB, which has 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 comprised of 144 SPUs, 24 TAUs, 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

The GeForce GT 440 1.5GB should theoretically be a lot faster 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 should be much (about 24%) more effective at texture filtering than the GeForce 820M. (explain)

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

Pixel Rate

The GeForce GT 440 1.5GB will be quite a bit (more or less 396%) faster with regards to FSAA than the GeForce 820M, and also will be capable of handling higher resolutions without losing too much performance. (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 maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.