GeForce 820M vs GeForce GTX 280

Intro

Compare those specs to the GeForce GTX 280, which comes with core speeds of 602 MHz on the GPU, and 1107 MHz on the 1024 MB of GDDR3 memory. It features 240 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 280		236 Watts
	Difference: 221 Watts (1473%)

Memory Bandwidth

Performance-wise, the GeForce GTX 280 should theoretically be much superior to the GeForce 820M in general. (explain)

GeForce GTX 280		141696 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 125696 (786%)

Texel Rate

The GeForce GTX 280 is a lot (approximately 319%) faster with regards to anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 280		48160 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 36656 (319%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 280 is superior to the GeForce 820M, by far. (explain)

GeForce GTX 280		19264 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 16388 (570%)

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 data (counted in MB per second) that can be transported over the external memory interface in a second. It is worked out 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 it uses DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out 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 also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.