GeForce 820M vs GeForce GTX 590

Intro

Compare all that to the GeForce GTX 590, which comes with a clock speed of 607 MHz and a GDDR5 memory frequency of 855 MHz. It also features a 384-bit bus, and makes use of a 40 nm design. It is comprised of 512 SPUs, 64 Texture Address Units, and 48 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 590		6680 points
GeForce 820M		850 points
	Difference: 5830 (686%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GTX 590		365 Watts
	Difference: 350 Watts (2333%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 590 should perform much faster than the GeForce 820M in general. (explain)

GeForce GTX 590		328320 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 312320 (1952%)

Texel Rate

The GeForce GTX 590 is quite a bit (more or less 575%) more effective at anisotropic filtering than the GeForce 820M. (explain)

GeForce GTX 590		77696 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 66192 (575%)

Pixel Rate

The GeForce GTX 590 should be a lot (approximately 1926%) faster with regards to anti-aliasing than the GeForce 820M, and should be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 590		58272 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 55396 (1926%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at 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 card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the max fill rate.