GeForce 820M vs GeForce GTX 880M

Intro

Compare all that to the GeForce GTX 880M, which has core speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator 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 880M		6360 points
GeForce 820M		850 points
	Difference: 5510 (648%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 880M		130 Watts
	Difference: 115 Watts (767%)

Memory Bandwidth

The GeForce GTX 880M should in theory be much faster than the GeForce 820M in general. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 112000 (700%)

Texel Rate

The GeForce GTX 880M should be much (approximately 961%) better at texture filtering than the GeForce 820M. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 110608 (961%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 880M is superior to the GeForce 820M, and very much so. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 27652 (961%)

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 MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

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