GeForce 820M vs GeForce GTX 960

Intro

Compare those specs to the GeForce GTX 960, which uses a 28 nm design. nVidia has clocked the core speed at 1127 MHz. The GDDR5 RAM is set to run at a frequency of 1750 MHz on this particular card. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

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 960		7627 points
GeForce 820M		850 points
	Difference: 6777 (797%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 960		120 Watts
	Difference: 105 Watts (700%)

Memory Bandwidth

In theory, the GeForce GTX 960 is 600% faster than the GeForce 820M in general, due to its greater data rate. (explain)

GeForce GTX 960		112000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 96000 (600%)

Texel Rate

The GeForce GTX 960 is much (about 527%) better at anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 960		72128 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 60624 (527%)

Pixel Rate

The GeForce GTX 960 is a lot (more or less 1154%) better at full screen anti-aliasing than the GeForce 820M, and able to handle higher resolutions more effectively. (explain)

GeForce GTX 960		36064 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 33188 (1154%)

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 information (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 processed per second. This is worked out by multiplying the total number 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 in a 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. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.