GeForce 810M vs GeForce GT 420

Intro

Compare all that to the GeForce GT 420, which comes with core clock speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 48 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 810M		15 Watts
GeForce GT 420		50 Watts
	Difference: 35 Watts (233%)

Memory Bandwidth

Performance-wise, the GeForce GT 420 should in theory be quite a bit superior to the GeForce 810M in general. (explain)

GeForce GT 420		28800 MB/sec
GeForce 810M		14400 MB/sec
	Difference: 14400 (100%)

Texel Rate

The GeForce 810M will be a small bit (approximately 5%) more effective at texture filtering than the GeForce GT 420. (explain)

GeForce 810M		5904 Mtexels/sec
GeForce GT 420		5600 Mtexels/sec
	Difference: 304 (5%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 810M is the winner, but it probably won't make a huge difference. (explain)

GeForce 810M		2952 Mpixels/sec
GeForce GT 420		2800 Mpixels/sec
	Difference: 152 (5%)

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 data (counted in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 amount of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of 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.