GeForce 820M vs Geforce GTX 690

Intro

Compare all of that to the Geforce GTX 690, which uses a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 RAM is set to run at a frequency of 1502 MHz on this particular card. It features 1536 SPUs along with 128 TAUs 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 690		13111 points
GeForce 820M		850 points
	Difference: 12261 (1442%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Geforce GTX 690		300 Watts
	Difference: 285 Watts (1900%)

Memory Bandwidth

Theoretically, the Geforce GTX 690 should perform quite a bit faster than the GeForce 820M overall. (explain)

Geforce GTX 690		384512 MB/sec
GeForce 820M		16000 MB/sec
	Difference: 368512 (2303%)

Texel Rate

The Geforce GTX 690 will be a lot (approximately 1936%) faster with regards to texture filtering than the GeForce 820M. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce 820M		11504 Mtexels/sec
	Difference: 222736 (1936%)

Pixel Rate

The Geforce GTX 690 should be much (about 1936%) faster with regards to AA than the GeForce 820M, and should be able to handle higher resolutions better. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce 820M		2876 Mpixels/sec
	Difference: 55684 (1936%)

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 largest amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could 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 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.