GeForce 820M vs GeForce GTX 460

Intro

Compare those specs to the GeForce GTX 460, which features GPU clock speed of 675 MHz, and 768 MB of GDDR5 RAM set to run at 900 MHz through a 192-bit bus. It also features 336 SPUs, 56 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 GTX 460		2557 points
GeForce 820M		850 points
	Difference: 1707 (201%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 460		150 Watts
	Difference: 135 Watts (900%)

Memory Bandwidth

In theory, the GeForce GTX 460 is 440% faster than the GeForce 820M overall, due to its higher bandwidth. (explain)

GeForce GTX 460		86400 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 70400 (440%)

Texel Rate

The GeForce GTX 460 should be a lot (more or less 229%) more effective at anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 460		37800 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 26296 (229%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 460 is a better choice, and very much so. (explain)

GeForce GTX 460		16200 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 13324 (463%)

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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 are processed per second. This number is worked out by multiplying the total amount of texture units by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.