GeForce 820M vs GeForce GT 210

Intro

Compare all of that to the GeForce GT 210, which has a clock speed of 589 MHz and a DDR3 memory frequency of 800 MHz. It also uses a 64-bit memory bus, and makes use of a 40 nm design. It is comprised of 16 SPUs, 8 TAUs, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
GeForce GT 210		31 Watts
	Difference: 16 Watts (107%)

Memory Bandwidth

Theoretically speaking, the GeForce 820M should be 25% faster than the GeForce GT 210 in general, because of its higher data rate. (explain)

GeForce 820M		16000 MB/sec
GeForce GT 210		12800 MB/sec
	Difference: 3200 (25%)

Texel Rate

The GeForce 820M should be quite a bit (about 144%) better at AF than the GeForce GT 210. (explain)

GeForce 820M		11504 Mtexels/sec
GeForce GT 210		4712 Mtexels/sec
	Difference: 6792 (144%)

Pixel Rate

The GeForce 820M should be much (approximately 22%) faster with regards to FSAA than the GeForce GT 210, and also able to handle higher resolutions while still performing well. (explain)

GeForce 820M		2876 Mpixels/sec
GeForce GT 210		2356 Mpixels/sec
	Difference: 520 (22%)

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 maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units 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 also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.